Mercurial > sdl-ios-xcode
annotate src/stdlib/SDL_malloc.c @ 4527:3ce59cbecaa3
Added support for testing window manager icons
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Wed, 14 Jul 2010 21:25:15 -0700 |
| parents | f7b03b6838cb |
| children | b530ef003506 |
| rev | line source |
|---|---|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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1 /* |
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2 SDL - Simple DirectMedia Layer |
| 3697 | 3 Copyright (C) 1997-2010 Sam Lantinga |
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4 |
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5 This library is free software; you can redistribute it and/or |
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6 modify it under the terms of the GNU Lesser General Public |
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7 License as published by the Free Software Foundation; either |
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8 version 2.1 of the License, or (at your option) any later version. |
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9 |
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10 This library is distributed in the hope that it will be useful, |
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 Lesser General Public License for more details. |
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14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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18 |
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19 Sam Lantinga |
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20 slouken@libsdl.org |
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21 */ |
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22 #include "SDL_config.h" |
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23 |
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24 /* This file contains portable memory management functions for SDL */ |
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25 |
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Fixed build problem with SDL_string.c
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26 #include "SDL_stdinc.h" |
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27 |
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28 #ifndef HAVE_MALLOC |
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29 |
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Updated WinCE support by Dmitry (with some tweaks)
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30 #define LACKS_SYS_TYPES_H |
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31 #define LACKS_STDIO_H |
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32 #define LACKS_STRINGS_H |
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33 #define LACKS_STRING_H |
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34 #define LACKS_STDLIB_H |
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35 #define ABORT |
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36 |
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37 /* |
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38 This is a version (aka dlmalloc) of malloc/free/realloc written by |
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39 Doug Lea and released to the public domain, as explained at |
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40 http://creativecommons.org/licenses/publicdomain. Send questions, |
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41 comments, complaints, performance data, etc to dl@cs.oswego.edu |
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42 |
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43 * Version 2.8.3 Thu Sep 22 11:16:15 2005 Doug Lea (dl at gee) |
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44 |
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45 Note: There may be an updated version of this malloc obtainable at |
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46 ftp://gee.cs.oswego.edu/pub/misc/malloc.c |
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47 Check before installing! |
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48 |
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49 * Quickstart |
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50 |
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51 This library is all in one file to simplify the most common usage: |
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52 ftp it, compile it (-O3), and link it into another program. All of |
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53 the compile-time options default to reasonable values for use on |
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54 most platforms. You might later want to step through various |
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55 compile-time and dynamic tuning options. |
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56 |
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57 For convenience, an include file for code using this malloc is at: |
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58 ftp://gee.cs.oswego.edu/pub/misc/malloc-2.8.3.h |
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59 You don't really need this .h file unless you call functions not |
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60 defined in your system include files. The .h file contains only the |
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61 excerpts from this file needed for using this malloc on ANSI C/C++ |
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62 systems, so long as you haven't changed compile-time options about |
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63 naming and tuning parameters. If you do, then you can create your |
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64 own malloc.h that does include all settings by cutting at the point |
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65 indicated below. Note that you may already by default be using a C |
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66 library containing a malloc that is based on some version of this |
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67 malloc (for example in linux). You might still want to use the one |
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68 in this file to customize settings or to avoid overheads associated |
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69 with library versions. |
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70 |
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71 * Vital statistics: |
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72 |
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73 Supported pointer/size_t representation: 4 or 8 bytes |
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74 size_t MUST be an unsigned type of the same width as |
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75 pointers. (If you are using an ancient system that declares |
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76 size_t as a signed type, or need it to be a different width |
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77 than pointers, you can use a previous release of this malloc |
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78 (e.g. 2.7.2) supporting these.) |
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79 |
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80 Alignment: 8 bytes (default) |
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81 This suffices for nearly all current machines and C compilers. |
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82 However, you can define MALLOC_ALIGNMENT to be wider than this |
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83 if necessary (up to 128bytes), at the expense of using more space. |
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84 |
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85 Minimum overhead per allocated chunk: 4 or 8 bytes (if 4byte sizes) |
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86 8 or 16 bytes (if 8byte sizes) |
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87 Each malloced chunk has a hidden word of overhead holding size |
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88 and status information, and additional cross-check word |
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89 if FOOTERS is defined. |
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90 |
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91 Minimum allocated size: 4-byte ptrs: 16 bytes (including overhead) |
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92 8-byte ptrs: 32 bytes (including overhead) |
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93 |
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94 Even a request for zero bytes (i.e., malloc(0)) returns a |
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95 pointer to something of the minimum allocatable size. |
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96 The maximum overhead wastage (i.e., number of extra bytes |
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97 allocated than were requested in malloc) is less than or equal |
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98 to the minimum size, except for requests >= mmap_threshold that |
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99 are serviced via mmap(), where the worst case wastage is about |
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100 32 bytes plus the remainder from a system page (the minimal |
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101 mmap unit); typically 4096 or 8192 bytes. |
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102 |
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103 Security: static-safe; optionally more or less |
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104 The "security" of malloc refers to the ability of malicious |
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105 code to accentuate the effects of errors (for example, freeing |
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106 space that is not currently malloc'ed or overwriting past the |
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107 ends of chunks) in code that calls malloc. This malloc |
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108 guarantees not to modify any memory locations below the base of |
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109 heap, i.e., static variables, even in the presence of usage |
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110 errors. The routines additionally detect most improper frees |
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111 and reallocs. All this holds as long as the static bookkeeping |
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112 for malloc itself is not corrupted by some other means. This |
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113 is only one aspect of security -- these checks do not, and |
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114 cannot, detect all possible programming errors. |
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115 |
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116 If FOOTERS is defined nonzero, then each allocated chunk |
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117 carries an additional check word to verify that it was malloced |
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118 from its space. These check words are the same within each |
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119 execution of a program using malloc, but differ across |
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120 executions, so externally crafted fake chunks cannot be |
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121 freed. This improves security by rejecting frees/reallocs that |
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122 could corrupt heap memory, in addition to the checks preventing |
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123 writes to statics that are always on. This may further improve |
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124 security at the expense of time and space overhead. (Note that |
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125 FOOTERS may also be worth using with MSPACES.) |
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126 |
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127 By default detected errors cause the program to abort (calling |
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128 "abort()"). You can override this to instead proceed past |
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129 errors by defining PROCEED_ON_ERROR. In this case, a bad free |
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130 has no effect, and a malloc that encounters a bad address |
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131 caused by user overwrites will ignore the bad address by |
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132 dropping pointers and indices to all known memory. This may |
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133 be appropriate for programs that should continue if at all |
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134 possible in the face of programming errors, although they may |
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135 run out of memory because dropped memory is never reclaimed. |
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136 |
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137 If you don't like either of these options, you can define |
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138 CORRUPTION_ERROR_ACTION and USAGE_ERROR_ACTION to do anything |
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139 else. And if if you are sure that your program using malloc has |
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140 no errors or vulnerabilities, you can define INSECURE to 1, |
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141 which might (or might not) provide a small performance improvement. |
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142 |
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143 Thread-safety: NOT thread-safe unless USE_LOCKS defined |
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144 When USE_LOCKS is defined, each public call to malloc, free, |
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145 etc is surrounded with either a pthread mutex or a win32 |
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146 spinlock (depending on WIN32). This is not especially fast, and |
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147 can be a major bottleneck. It is designed only to provide |
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148 minimal protection in concurrent environments, and to provide a |
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149 basis for extensions. If you are using malloc in a concurrent |
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150 program, consider instead using ptmalloc, which is derived from |
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151 a version of this malloc. (See http://www.malloc.de). |
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152 |
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153 System requirements: Any combination of MORECORE and/or MMAP/MUNMAP |
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154 This malloc can use unix sbrk or any emulation (invoked using |
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155 the CALL_MORECORE macro) and/or mmap/munmap or any emulation |
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156 (invoked using CALL_MMAP/CALL_MUNMAP) to get and release system |
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157 memory. On most unix systems, it tends to work best if both |
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158 MORECORE and MMAP are enabled. On Win32, it uses emulations |
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159 based on VirtualAlloc. It also uses common C library functions |
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160 like memset. |
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161 |
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162 Compliance: I believe it is compliant with the Single Unix Specification |
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163 (See http://www.unix.org). Also SVID/XPG, ANSI C, and probably |
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164 others as well. |
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165 |
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166 * Overview of algorithms |
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167 |
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168 This is not the fastest, most space-conserving, most portable, or |
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169 most tunable malloc ever written. However it is among the fastest |
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170 while also being among the most space-conserving, portable and |
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171 tunable. Consistent balance across these factors results in a good |
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172 general-purpose allocator for malloc-intensive programs. |
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173 |
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174 In most ways, this malloc is a best-fit allocator. Generally, it |
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175 chooses the best-fitting existing chunk for a request, with ties |
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176 broken in approximately least-recently-used order. (This strategy |
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177 normally maintains low fragmentation.) However, for requests less |
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178 than 256bytes, it deviates from best-fit when there is not an |
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179 exactly fitting available chunk by preferring to use space adjacent |
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180 to that used for the previous small request, as well as by breaking |
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181 ties in approximately most-recently-used order. (These enhance |
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182 locality of series of small allocations.) And for very large requests |
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183 (>= 256Kb by default), it relies on system memory mapping |
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184 facilities, if supported. (This helps avoid carrying around and |
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185 possibly fragmenting memory used only for large chunks.) |
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186 |
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187 All operations (except malloc_stats and mallinfo) have execution |
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188 times that are bounded by a constant factor of the number of bits in |
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189 a size_t, not counting any clearing in calloc or copying in realloc, |
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190 or actions surrounding MORECORE and MMAP that have times |
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191 proportional to the number of non-contiguous regions returned by |
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192 system allocation routines, which is often just 1. |
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193 |
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194 The implementation is not very modular and seriously overuses |
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195 macros. Perhaps someday all C compilers will do as good a job |
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196 inlining modular code as can now be done by brute-force expansion, |
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197 but now, enough of them seem not to. |
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198 |
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199 Some compilers issue a lot of warnings about code that is |
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200 dead/unreachable only on some platforms, and also about intentional |
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201 uses of negation on unsigned types. All known cases of each can be |
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202 ignored. |
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203 |
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204 For a longer but out of date high-level description, see |
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205 http://gee.cs.oswego.edu/dl/html/malloc.html |
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206 |
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207 * MSPACES |
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208 If MSPACES is defined, then in addition to malloc, free, etc., |
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209 this file also defines mspace_malloc, mspace_free, etc. These |
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210 are versions of malloc routines that take an "mspace" argument |
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211 obtained using create_mspace, to control all internal bookkeeping. |
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212 If ONLY_MSPACES is defined, only these versions are compiled. |
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213 So if you would like to use this allocator for only some allocations, |
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214 and your system malloc for others, you can compile with |
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215 ONLY_MSPACES and then do something like... |
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216 static mspace mymspace = create_mspace(0,0); // for example |
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217 #define mymalloc(bytes) mspace_malloc(mymspace, bytes) |
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218 |
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219 (Note: If you only need one instance of an mspace, you can instead |
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220 use "USE_DL_PREFIX" to relabel the global malloc.) |
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221 |
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222 You can similarly create thread-local allocators by storing |
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223 mspaces as thread-locals. For example: |
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224 static __thread mspace tlms = 0; |
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225 void* tlmalloc(size_t bytes) { |
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226 if (tlms == 0) tlms = create_mspace(0, 0); |
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227 return mspace_malloc(tlms, bytes); |
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228 } |
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229 void tlfree(void* mem) { mspace_free(tlms, mem); } |
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230 |
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231 Unless FOOTERS is defined, each mspace is completely independent. |
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232 You cannot allocate from one and free to another (although |
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233 conformance is only weakly checked, so usage errors are not always |
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234 caught). If FOOTERS is defined, then each chunk carries around a tag |
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235 indicating its originating mspace, and frees are directed to their |
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236 originating spaces. |
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237 |
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238 ------------------------- Compile-time options --------------------------- |
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239 |
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240 Be careful in setting #define values for numerical constants of type |
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241 size_t. On some systems, literal values are not automatically extended |
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242 to size_t precision unless they are explicitly casted. |
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243 |
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244 WIN32 default: defined if _WIN32 defined |
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245 Defining WIN32 sets up defaults for MS environment and compilers. |
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246 Otherwise defaults are for unix. |
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247 |
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248 MALLOC_ALIGNMENT default: (size_t)8 |
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249 Controls the minimum alignment for malloc'ed chunks. It must be a |
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250 power of two and at least 8, even on machines for which smaller |
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251 alignments would suffice. It may be defined as larger than this |
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252 though. Note however that code and data structures are optimized for |
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253 the case of 8-byte alignment. |
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254 |
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255 MSPACES default: 0 (false) |
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256 If true, compile in support for independent allocation spaces. |
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257 This is only supported if HAVE_MMAP is true. |
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258 |
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259 ONLY_MSPACES default: 0 (false) |
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260 If true, only compile in mspace versions, not regular versions. |
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261 |
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262 USE_LOCKS default: 0 (false) |
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263 Causes each call to each public routine to be surrounded with |
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264 pthread or WIN32 mutex lock/unlock. (If set true, this can be |
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265 overridden on a per-mspace basis for mspace versions.) |
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266 |
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267 FOOTERS default: 0 |
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268 If true, provide extra checking and dispatching by placing |
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269 information in the footers of allocated chunks. This adds |
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270 space and time overhead. |
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271 |
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272 INSECURE default: 0 |
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273 If true, omit checks for usage errors and heap space overwrites. |
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274 |
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275 USE_DL_PREFIX default: NOT defined |
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276 Causes compiler to prefix all public routines with the string 'dl'. |
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277 This can be useful when you only want to use this malloc in one part |
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278 of a program, using your regular system malloc elsewhere. |
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279 |
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280 ABORT default: defined as abort() |
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281 Defines how to abort on failed checks. On most systems, a failed |
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282 check cannot die with an "assert" or even print an informative |
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283 message, because the underlying print routines in turn call malloc, |
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284 which will fail again. Generally, the best policy is to simply call |
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285 abort(). It's not very useful to do more than this because many |
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286 errors due to overwriting will show up as address faults (null, odd |
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287 addresses etc) rather than malloc-triggered checks, so will also |
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288 abort. Also, most compilers know that abort() does not return, so |
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289 can better optimize code conditionally calling it. |
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290 |
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291 PROCEED_ON_ERROR default: defined as 0 (false) |
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292 Controls whether detected bad addresses cause them to bypassed |
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293 rather than aborting. If set, detected bad arguments to free and |
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294 realloc are ignored. And all bookkeeping information is zeroed out |
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295 upon a detected overwrite of freed heap space, thus losing the |
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296 ability to ever return it from malloc again, but enabling the |
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297 application to proceed. If PROCEED_ON_ERROR is defined, the |
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298 static variable malloc_corruption_error_count is compiled in |
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299 and can be examined to see if errors have occurred. This option |
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300 generates slower code than the default abort policy. |
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301 |
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302 DEBUG default: NOT defined |
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303 The DEBUG setting is mainly intended for people trying to modify |
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304 this code or diagnose problems when porting to new platforms. |
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305 However, it may also be able to better isolate user errors than just |
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306 using runtime checks. The assertions in the check routines spell |
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307 out in more detail the assumptions and invariants underlying the |
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308 algorithms. The checking is fairly extensive, and will slow down |
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309 execution noticeably. Calling malloc_stats or mallinfo with DEBUG |
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310 set will attempt to check every non-mmapped allocated and free chunk |
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311 in the course of computing the summaries. |
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312 |
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313 ABORT_ON_ASSERT_FAILURE default: defined as 1 (true) |
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314 Debugging assertion failures can be nearly impossible if your |
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315 version of the assert macro causes malloc to be called, which will |
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316 lead to a cascade of further failures, blowing the runtime stack. |
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317 ABORT_ON_ASSERT_FAILURE cause assertions failures to call abort(), |
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318 which will usually make debugging easier. |
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319 |
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320 MALLOC_FAILURE_ACTION default: sets errno to ENOMEM, or no-op on win32 |
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321 The action to take before "return 0" when malloc fails to be able to |
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322 return memory because there is none available. |
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323 |
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324 HAVE_MORECORE default: 1 (true) unless win32 or ONLY_MSPACES |
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325 True if this system supports sbrk or an emulation of it. |
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326 |
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327 MORECORE default: sbrk |
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328 The name of the sbrk-style system routine to call to obtain more |
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329 memory. See below for guidance on writing custom MORECORE |
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330 functions. The type of the argument to sbrk/MORECORE varies across |
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331 systems. It cannot be size_t, because it supports negative |
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332 arguments, so it is normally the signed type of the same width as |
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333 size_t (sometimes declared as "intptr_t"). It doesn't much matter |
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334 though. Internally, we only call it with arguments less than half |
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335 the max value of a size_t, which should work across all reasonable |
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336 possibilities, although sometimes generating compiler warnings. See |
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337 near the end of this file for guidelines for creating a custom |
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338 version of MORECORE. |
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339 |
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340 MORECORE_CONTIGUOUS default: 1 (true) |
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341 If true, take advantage of fact that consecutive calls to MORECORE |
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342 with positive arguments always return contiguous increasing |
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343 addresses. This is true of unix sbrk. It does not hurt too much to |
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344 set it true anyway, since malloc copes with non-contiguities. |
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345 Setting it false when definitely non-contiguous saves time |
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346 and possibly wasted space it would take to discover this though. |
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347 |
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348 MORECORE_CANNOT_TRIM default: NOT defined |
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349 True if MORECORE cannot release space back to the system when given |
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350 negative arguments. This is generally necessary only if you are |
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351 using a hand-crafted MORECORE function that cannot handle negative |
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352 arguments. |
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353 |
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354 HAVE_MMAP default: 1 (true) |
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355 True if this system supports mmap or an emulation of it. If so, and |
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356 HAVE_MORECORE is not true, MMAP is used for all system |
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357 allocation. If set and HAVE_MORECORE is true as well, MMAP is |
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358 primarily used to directly allocate very large blocks. It is also |
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359 used as a backup strategy in cases where MORECORE fails to provide |
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360 space from system. Note: A single call to MUNMAP is assumed to be |
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361 able to unmap memory that may have be allocated using multiple calls |
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362 to MMAP, so long as they are adjacent. |
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363 |
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364 HAVE_MREMAP default: 1 on linux, else 0 |
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365 If true realloc() uses mremap() to re-allocate large blocks and |
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366 extend or shrink allocation spaces. |
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367 |
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368 MMAP_CLEARS default: 1 on unix |
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369 True if mmap clears memory so calloc doesn't need to. This is true |
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370 for standard unix mmap using /dev/zero. |
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371 |
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372 USE_BUILTIN_FFS default: 0 (i.e., not used) |
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373 Causes malloc to use the builtin ffs() function to compute indices. |
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374 Some compilers may recognize and intrinsify ffs to be faster than the |
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375 supplied C version. Also, the case of x86 using gcc is special-cased |
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376 to an asm instruction, so is already as fast as it can be, and so |
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377 this setting has no effect. (On most x86s, the asm version is only |
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378 slightly faster than the C version.) |
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379 |
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380 malloc_getpagesize default: derive from system includes, or 4096. |
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381 The system page size. To the extent possible, this malloc manages |
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382 memory from the system in page-size units. This may be (and |
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383 usually is) a function rather than a constant. This is ignored |
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384 if WIN32, where page size is determined using getSystemInfo during |
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385 initialization. |
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386 |
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387 USE_DEV_RANDOM default: 0 (i.e., not used) |
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388 Causes malloc to use /dev/random to initialize secure magic seed for |
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389 stamping footers. Otherwise, the current time is used. |
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390 |
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391 NO_MALLINFO default: 0 |
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392 If defined, don't compile "mallinfo". This can be a simple way |
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393 of dealing with mismatches between system declarations and |
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394 those in this file. |
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395 |
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396 MALLINFO_FIELD_TYPE default: size_t |
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397 The type of the fields in the mallinfo struct. This was originally |
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398 defined as "int" in SVID etc, but is more usefully defined as |
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399 size_t. The value is used only if HAVE_USR_INCLUDE_MALLOC_H is not set |
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400 |
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401 REALLOC_ZERO_BYTES_FREES default: not defined |
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402 This should be set if a call to realloc with zero bytes should |
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403 be the same as a call to free. Some people think it should. Otherwise, |
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404 since this malloc returns a unique pointer for malloc(0), so does |
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405 realloc(p, 0). |
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406 |
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407 LACKS_UNISTD_H, LACKS_FCNTL_H, LACKS_SYS_PARAM_H, LACKS_SYS_MMAN_H |
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408 LACKS_STRINGS_H, LACKS_STRING_H, LACKS_SYS_TYPES_H, LACKS_ERRNO_H |
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409 LACKS_STDLIB_H default: NOT defined unless on WIN32 |
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410 Define these if your system does not have these header files. |
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411 You might need to manually insert some of the declarations they provide. |
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412 |
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413 DEFAULT_GRANULARITY default: page size if MORECORE_CONTIGUOUS, |
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414 system_info.dwAllocationGranularity in WIN32, |
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415 otherwise 64K. |
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416 Also settable using mallopt(M_GRANULARITY, x) |
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417 The unit for allocating and deallocating memory from the system. On |
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418 most systems with contiguous MORECORE, there is no reason to |
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419 make this more than a page. However, systems with MMAP tend to |
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420 either require or encourage larger granularities. You can increase |
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421 this value to prevent system allocation functions to be called so |
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422 often, especially if they are slow. The value must be at least one |
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423 page and must be a power of two. Setting to 0 causes initialization |
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424 to either page size or win32 region size. (Note: In previous |
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425 versions of malloc, the equivalent of this option was called |
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426 "TOP_PAD") |
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427 |
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428 DEFAULT_TRIM_THRESHOLD default: 2MB |
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429 Also settable using mallopt(M_TRIM_THRESHOLD, x) |
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430 The maximum amount of unused top-most memory to keep before |
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431 releasing via malloc_trim in free(). Automatic trimming is mainly |
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432 useful in long-lived programs using contiguous MORECORE. Because |
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433 trimming via sbrk can be slow on some systems, and can sometimes be |
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434 wasteful (in cases where programs immediately afterward allocate |
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435 more large chunks) the value should be high enough so that your |
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436 overall system performance would improve by releasing this much |
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437 memory. As a rough guide, you might set to a value close to the |
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438 average size of a process (program) running on your system. |
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439 Releasing this much memory would allow such a process to run in |
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440 memory. Generally, it is worth tuning trim thresholds when a |
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441 program undergoes phases where several large chunks are allocated |
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442 and released in ways that can reuse each other's storage, perhaps |
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443 mixed with phases where there are no such chunks at all. The trim |
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444 value must be greater than page size to have any useful effect. To |
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445 disable trimming completely, you can set to MAX_SIZE_T. Note that the trick |
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446 some people use of mallocing a huge space and then freeing it at |
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447 program startup, in an attempt to reserve system memory, doesn't |
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448 have the intended effect under automatic trimming, since that memory |
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449 will immediately be returned to the system. |
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450 |
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451 DEFAULT_MMAP_THRESHOLD default: 256K |
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452 Also settable using mallopt(M_MMAP_THRESHOLD, x) |
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453 The request size threshold for using MMAP to directly service a |
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454 request. Requests of at least this size that cannot be allocated |
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455 using already-existing space will be serviced via mmap. (If enough |
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456 normal freed space already exists it is used instead.) Using mmap |
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457 segregates relatively large chunks of memory so that they can be |
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458 individually obtained and released from the host system. A request |
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459 serviced through mmap is never reused by any other request (at least |
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460 not directly; the system may just so happen to remap successive |
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461 requests to the same locations). Segregating space in this way has |
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462 the benefits that: Mmapped space can always be individually released |
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463 back to the system, which helps keep the system level memory demands |
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464 of a long-lived program low. Also, mapped memory doesn't become |
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465 `locked' between other chunks, as can happen with normally allocated |
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466 chunks, which means that even trimming via malloc_trim would not |
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467 release them. However, it has the disadvantage that the space |
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468 cannot be reclaimed, consolidated, and then used to service later |
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469 requests, as happens with normal chunks. The advantages of mmap |
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470 nearly always outweigh disadvantages for "large" chunks, but the |
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471 value of "large" may vary across systems. The default is an |
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472 empirically derived value that works well in most systems. You can |
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473 disable mmap by setting to MAX_SIZE_T. |
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474 |
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475 */ |
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476 |
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477 #ifndef WIN32 |
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478 #ifdef _WIN32 |
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479 #define WIN32 1 |
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480 #endif /* _WIN32 */ |
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481 #endif /* WIN32 */ |
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482 #ifdef WIN32 |
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483 #define WIN32_LEAN_AND_MEAN |
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484 #include <windows.h> |
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485 #define HAVE_MMAP 1 |
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486 #define HAVE_MORECORE 0 |
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487 #define LACKS_UNISTD_H |
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488 #define LACKS_SYS_PARAM_H |
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489 #define LACKS_SYS_MMAN_H |
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490 #define LACKS_STRING_H |
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491 #define LACKS_STRINGS_H |
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492 #define LACKS_SYS_TYPES_H |
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493 #define LACKS_ERRNO_H |
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494 #define LACKS_FCNTL_H |
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495 #define MALLOC_FAILURE_ACTION |
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496 #define MMAP_CLEARS 0 /* WINCE and some others apparently don't clear */ |
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497 #endif /* WIN32 */ |
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498 |
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499 #if defined(DARWIN) || defined(_DARWIN) |
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500 /* Mac OSX docs advise not to use sbrk; it seems better to use mmap */ |
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501 #ifndef HAVE_MORECORE |
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502 #define HAVE_MORECORE 0 |
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503 #define HAVE_MMAP 1 |
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504 #endif /* HAVE_MORECORE */ |
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505 #endif /* DARWIN */ |
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506 |
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507 #ifndef LACKS_SYS_TYPES_H |
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508 #include <sys/types.h> /* For size_t */ |
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509 #endif /* LACKS_SYS_TYPES_H */ |
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510 |
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511 /* The maximum possible size_t value has all bits set */ |
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512 #define MAX_SIZE_T (~(size_t)0) |
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513 |
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514 #ifndef ONLY_MSPACES |
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515 #define ONLY_MSPACES 0 |
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516 #endif /* ONLY_MSPACES */ |
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517 #ifndef MSPACES |
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518 #if ONLY_MSPACES |
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519 #define MSPACES 1 |
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520 #else /* ONLY_MSPACES */ |
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521 #define MSPACES 0 |
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522 #endif /* ONLY_MSPACES */ |
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523 #endif /* MSPACES */ |
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524 #ifndef MALLOC_ALIGNMENT |
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525 #define MALLOC_ALIGNMENT ((size_t)8U) |
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526 #endif /* MALLOC_ALIGNMENT */ |
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527 #ifndef FOOTERS |
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528 #define FOOTERS 0 |
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529 #endif /* FOOTERS */ |
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530 #ifndef ABORT |
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531 #define ABORT abort() |
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532 #endif /* ABORT */ |
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533 #ifndef ABORT_ON_ASSERT_FAILURE |
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534 #define ABORT_ON_ASSERT_FAILURE 1 |
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535 #endif /* ABORT_ON_ASSERT_FAILURE */ |
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536 #ifndef PROCEED_ON_ERROR |
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537 #define PROCEED_ON_ERROR 0 |
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538 #endif /* PROCEED_ON_ERROR */ |
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539 #ifndef USE_LOCKS |
|
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|
540 #define USE_LOCKS 0 |
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541 #endif /* USE_LOCKS */ |
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542 #ifndef INSECURE |
|
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543 #define INSECURE 0 |
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544 #endif /* INSECURE */ |
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545 #ifndef HAVE_MMAP |
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546 #define HAVE_MMAP 1 |
|
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547 #endif /* HAVE_MMAP */ |
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548 #ifndef MMAP_CLEARS |
|
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549 #define MMAP_CLEARS 1 |
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550 #endif /* MMAP_CLEARS */ |
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551 #ifndef HAVE_MREMAP |
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552 #ifdef linux |
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553 #define HAVE_MREMAP 1 |
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554 #else /* linux */ |
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555 #define HAVE_MREMAP 0 |
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556 #endif /* linux */ |
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557 #endif /* HAVE_MREMAP */ |
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558 #ifndef MALLOC_FAILURE_ACTION |
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559 #define MALLOC_FAILURE_ACTION errno = ENOMEM; |
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560 #endif /* MALLOC_FAILURE_ACTION */ |
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561 #ifndef HAVE_MORECORE |
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562 #if ONLY_MSPACES |
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563 #define HAVE_MORECORE 0 |
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564 #else /* ONLY_MSPACES */ |
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565 #define HAVE_MORECORE 1 |
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566 #endif /* ONLY_MSPACES */ |
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567 #endif /* HAVE_MORECORE */ |
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568 #if !HAVE_MORECORE |
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569 #define MORECORE_CONTIGUOUS 0 |
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570 #else /* !HAVE_MORECORE */ |
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571 #ifndef MORECORE |
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572 #define MORECORE sbrk |
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573 #endif /* MORECORE */ |
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574 #ifndef MORECORE_CONTIGUOUS |
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575 #define MORECORE_CONTIGUOUS 1 |
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576 #endif /* MORECORE_CONTIGUOUS */ |
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577 #endif /* HAVE_MORECORE */ |
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578 #ifndef DEFAULT_GRANULARITY |
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579 #if MORECORE_CONTIGUOUS |
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580 #define DEFAULT_GRANULARITY (0) /* 0 means to compute in init_mparams */ |
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581 #else /* MORECORE_CONTIGUOUS */ |
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582 #define DEFAULT_GRANULARITY ((size_t)64U * (size_t)1024U) |
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583 #endif /* MORECORE_CONTIGUOUS */ |
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584 #endif /* DEFAULT_GRANULARITY */ |
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585 #ifndef DEFAULT_TRIM_THRESHOLD |
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586 #ifndef MORECORE_CANNOT_TRIM |
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587 #define DEFAULT_TRIM_THRESHOLD ((size_t)2U * (size_t)1024U * (size_t)1024U) |
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588 #else /* MORECORE_CANNOT_TRIM */ |
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589 #define DEFAULT_TRIM_THRESHOLD MAX_SIZE_T |
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590 #endif /* MORECORE_CANNOT_TRIM */ |
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591 #endif /* DEFAULT_TRIM_THRESHOLD */ |
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592 #ifndef DEFAULT_MMAP_THRESHOLD |
|
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593 #if HAVE_MMAP |
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594 #define DEFAULT_MMAP_THRESHOLD ((size_t)256U * (size_t)1024U) |
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595 #else /* HAVE_MMAP */ |
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596 #define DEFAULT_MMAP_THRESHOLD MAX_SIZE_T |
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597 #endif /* HAVE_MMAP */ |
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598 #endif /* DEFAULT_MMAP_THRESHOLD */ |
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599 #ifndef USE_BUILTIN_FFS |
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600 #define USE_BUILTIN_FFS 0 |
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601 #endif /* USE_BUILTIN_FFS */ |
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602 #ifndef USE_DEV_RANDOM |
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603 #define USE_DEV_RANDOM 0 |
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604 #endif /* USE_DEV_RANDOM */ |
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605 #ifndef NO_MALLINFO |
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606 #define NO_MALLINFO 0 |
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607 #endif /* NO_MALLINFO */ |
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608 #ifndef MALLINFO_FIELD_TYPE |
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609 #define MALLINFO_FIELD_TYPE size_t |
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610 #endif /* MALLINFO_FIELD_TYPE */ |
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611 |
|
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612 #define memset SDL_memset |
|
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Reverted r3255:3256. Don't actually need it unless the build is broken. :)
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613 #define memcpy SDL_memcpy |
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614 #define malloc SDL_malloc |
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615 #define calloc SDL_calloc |
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616 #define realloc SDL_realloc |
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617 #define free SDL_free |
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618 |
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619 /* |
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620 mallopt tuning options. SVID/XPG defines four standard parameter |
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621 numbers for mallopt, normally defined in malloc.h. None of these |
|
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622 are used in this malloc, so setting them has no effect. But this |
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623 malloc does support the following options. |
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624 */ |
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625 |
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626 #define M_TRIM_THRESHOLD (-1) |
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627 #define M_GRANULARITY (-2) |
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628 #define M_MMAP_THRESHOLD (-3) |
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629 |
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|
630 /* ------------------------ Mallinfo declarations ------------------------ */ |
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631 |
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|
632 #if !NO_MALLINFO |
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|
633 /* |
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|
634 This version of malloc supports the standard SVID/XPG mallinfo |
|
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635 routine that returns a struct containing usage properties and |
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|
636 statistics. It should work on any system that has a |
|
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|
637 /usr/include/malloc.h defining struct mallinfo. The main |
|
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|
638 declaration needed is the mallinfo struct that is returned (by-copy) |
|
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|
639 by mallinfo(). The malloinfo struct contains a bunch of fields that |
|
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|
640 are not even meaningful in this version of malloc. These fields are |
|
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|
641 are instead filled by mallinfo() with other numbers that might be of |
|
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|
642 interest. |
|
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|
643 |
|
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|
644 HAVE_USR_INCLUDE_MALLOC_H should be set if you have a |
|
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645 /usr/include/malloc.h file that includes a declaration of struct |
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646 mallinfo. If so, it is included; else a compliant version is |
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647 declared below. These must be precisely the same for mallinfo() to |
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|
648 work. The original SVID version of this struct, defined on most |
|
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|
649 systems with mallinfo, declares all fields as ints. But some others |
|
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|
650 define as unsigned long. If your system defines the fields using a |
|
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|
651 type of different width than listed here, you MUST #include your |
|
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|
652 system version and #define HAVE_USR_INCLUDE_MALLOC_H. |
|
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|
653 */ |
|
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|
654 |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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|
655 /* #define HAVE_USR_INCLUDE_MALLOC_H */ |
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656 |
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657 #ifdef HAVE_USR_INCLUDE_MALLOC_H |
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658 #include "/usr/include/malloc.h" |
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659 #else /* HAVE_USR_INCLUDE_MALLOC_H */ |
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660 |
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661 struct mallinfo |
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662 { |
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663 MALLINFO_FIELD_TYPE arena; /* non-mmapped space allocated from system */ |
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664 MALLINFO_FIELD_TYPE ordblks; /* number of free chunks */ |
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665 MALLINFO_FIELD_TYPE smblks; /* always 0 */ |
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666 MALLINFO_FIELD_TYPE hblks; /* always 0 */ |
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667 MALLINFO_FIELD_TYPE hblkhd; /* space in mmapped regions */ |
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668 MALLINFO_FIELD_TYPE usmblks; /* maximum total allocated space */ |
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669 MALLINFO_FIELD_TYPE fsmblks; /* always 0 */ |
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670 MALLINFO_FIELD_TYPE uordblks; /* total allocated space */ |
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671 MALLINFO_FIELD_TYPE fordblks; /* total free space */ |
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672 MALLINFO_FIELD_TYPE keepcost; /* releasable (via malloc_trim) space */ |
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673 }; |
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674 |
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675 #endif /* HAVE_USR_INCLUDE_MALLOC_H */ |
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676 #endif /* NO_MALLINFO */ |
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677 |
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678 #ifdef __cplusplus |
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679 extern "C" |
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680 { |
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681 #endif /* __cplusplus */ |
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682 |
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683 #if !ONLY_MSPACES |
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684 |
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685 /* ------------------- Declarations of public routines ------------------- */ |
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686 |
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687 #ifndef USE_DL_PREFIX |
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688 #define dlcalloc calloc |
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689 #define dlfree free |
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690 #define dlmalloc malloc |
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691 #define dlmemalign memalign |
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692 #define dlrealloc realloc |
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693 #define dlvalloc valloc |
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694 #define dlpvalloc pvalloc |
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695 #define dlmallinfo mallinfo |
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696 #define dlmallopt mallopt |
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697 #define dlmalloc_trim malloc_trim |
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698 #define dlmalloc_stats malloc_stats |
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699 #define dlmalloc_usable_size malloc_usable_size |
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700 #define dlmalloc_footprint malloc_footprint |
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701 #define dlmalloc_max_footprint malloc_max_footprint |
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702 #define dlindependent_calloc independent_calloc |
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703 #define dlindependent_comalloc independent_comalloc |
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704 #endif /* USE_DL_PREFIX */ |
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705 |
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706 |
|
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707 /* |
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|
708 malloc(size_t n) |
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709 Returns a pointer to a newly allocated chunk of at least n bytes, or |
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710 null if no space is available, in which case errno is set to ENOMEM |
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711 on ANSI C systems. |
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712 |
|
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|
713 If n is zero, malloc returns a minimum-sized chunk. (The minimum |
|
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714 size is 16 bytes on most 32bit systems, and 32 bytes on 64bit |
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715 systems.) Note that size_t is an unsigned type, so calls with |
|
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716 arguments that would be negative if signed are interpreted as |
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717 requests for huge amounts of space, which will often fail. The |
|
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|
718 maximum supported value of n differs across systems, but is in all |
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|
719 cases less than the maximum representable value of a size_t. |
|
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|
720 */ |
|
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|
721 void *dlmalloc(size_t); |
|
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722 |
|
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|
723 /* |
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|
724 free(void* p) |
|
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|
725 Releases the chunk of memory pointed to by p, that had been previously |
|
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|
726 allocated using malloc or a related routine such as realloc. |
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727 It has no effect if p is null. If p was not malloced or already |
|
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|
728 freed, free(p) will by default cause the current program to abort. |
|
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|
729 */ |
|
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|
730 void dlfree(void *); |
|
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|
731 |
|
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|
732 /* |
|
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|
733 calloc(size_t n_elements, size_t element_size); |
|
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|
734 Returns a pointer to n_elements * element_size bytes, with all locations |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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|
735 set to zero. |
|
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|
736 */ |
|
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|
737 void *dlcalloc(size_t, size_t); |
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738 |
|
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|
739 /* |
|
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|
740 realloc(void* p, size_t n) |
|
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|
741 Returns a pointer to a chunk of size n that contains the same data |
|
450721ad5436
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parents:
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|
742 as does chunk p up to the minimum of (n, p's size) bytes, or null |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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|
743 if no space is available. |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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|
744 |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
diff
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|
745 The returned pointer may or may not be the same as p. The algorithm |
|
450721ad5436
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parents:
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|
746 prefers extending p in most cases when possible, otherwise it |
|
450721ad5436
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Sam Lantinga <slouken@libsdl.org>
parents:
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|
747 employs the equivalent of a malloc-copy-free sequence. |
|
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|
748 |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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|
749 If p is null, realloc is equivalent to malloc. |
|
450721ad5436
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parents:
diff
changeset
|
750 |
|
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Sam Lantinga <slouken@libsdl.org>
parents:
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changeset
|
751 If space is not available, realloc returns null, errno is set (if on |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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|
752 ANSI) and p is NOT freed. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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changeset
|
753 |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
754 if n is for fewer bytes than already held by p, the newly unused |
|
450721ad5436
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parents:
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changeset
|
755 space is lopped off and freed if possible. realloc with a size |
|
450721ad5436
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parents:
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|
756 argument of zero (re)allocates a minimum-sized chunk. |
|
450721ad5436
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|
757 |
|
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changeset
|
758 The old unix realloc convention of allowing the last-free'd chunk |
|
450721ad5436
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|
759 to be used as an argument to realloc is not supported. |
|
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|
760 */ |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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|
761 |
|
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|
762 void *dlrealloc(void *, size_t); |
|
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|
763 |
|
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parents:
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changeset
|
764 /* |
|
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|
765 memalign(size_t alignment, size_t n); |
|
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It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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|
766 Returns a pointer to a newly allocated chunk of n bytes, aligned |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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767 in accord with the alignment argument. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
768 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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|
769 The alignment argument should be a power of two. If the argument is |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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changeset
|
770 not a power of two, the nearest greater power is used. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
771 8-byte alignment is guaranteed by normal malloc calls, so don't |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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changeset
|
772 bother calling memalign with an argument of 8 or less. |
|
450721ad5436
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parents:
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|
773 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
774 Overreliance on memalign is a sure way to fragment space. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
775 */ |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
776 void *dlmemalign(size_t, size_t); |
|
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|
777 |
|
450721ad5436
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parents:
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|
778 /* |
|
450721ad5436
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parents:
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|
779 valloc(size_t n); |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
780 Equivalent to memalign(pagesize, n), where pagesize is the page |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
781 size of the system. If the pagesize is unknown, 4096 is used. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
782 */ |
|
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c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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1465
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|
783 void *dlvalloc(size_t); |
|
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784 |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
785 /* |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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changeset
|
786 mallopt(int parameter_number, int parameter_value) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
787 Sets tunable parameters The format is to provide a |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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|
788 (parameter-number, parameter-value) pair. mallopt then sets the |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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|
789 corresponding parameter to the argument value if it can (i.e., so |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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|
790 long as the value is meaningful), and returns 1 if successful else |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
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|
791 0. SVID/XPG/ANSI defines four standard param numbers for mallopt, |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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|
792 normally defined in malloc.h. None of these are use in this malloc, |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
793 so setting them has no effect. But this malloc also supports other |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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changeset
|
794 options in mallopt. See below for details. Briefly, supported |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
795 parameters are as follows (listed defaults are for "typical" |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
796 configurations). |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
797 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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changeset
|
798 Symbol param # default allowed param values |
|
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parents:
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|
799 M_TRIM_THRESHOLD -1 2*1024*1024 any (MAX_SIZE_T disables) |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
800 M_GRANULARITY -2 page size any power of 2 >= page size |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
801 M_MMAP_THRESHOLD -3 256*1024 any (or 0 if no MMAP support) |
|
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parents:
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|
802 */ |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
803 int dlmallopt(int, int); |
|
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|
804 |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
805 /* |
|
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parents:
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|
806 malloc_footprint(); |
|
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parents:
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|
807 Returns the number of bytes obtained from the system. The total |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
808 number of bytes allocated by malloc, realloc etc., is less than this |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
809 value. Unlike mallinfo, this function returns only a precomputed |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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|
810 result, so can be called frequently to monitor memory consumption. |
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Sam Lantinga <slouken@libsdl.org>
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|
811 Even if locks are otherwise defined, this function does not use them, |
|
450721ad5436
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|
812 so results might not be up to date. |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
813 */ |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
814 size_t dlmalloc_footprint(void); |
|
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|
815 |
|
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|
816 /* |
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|
817 malloc_max_footprint(); |
|
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parents:
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|
818 Returns the maximum number of bytes obtained from the system. This |
|
450721ad5436
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parents:
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|
819 value will be greater than current footprint if deallocated space |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
820 has been reclaimed by the system. The peak number of bytes allocated |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
821 by malloc, realloc etc., is less than this value. Unlike mallinfo, |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
822 this function returns only a precomputed result, so can be called |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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changeset
|
823 frequently to monitor memory consumption. Even if locks are |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
824 otherwise defined, this function does not use them, so results might |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
825 not be up to date. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
826 */ |
|
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827 size_t dlmalloc_max_footprint(void); |
|
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|
828 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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changeset
|
829 #if !NO_MALLINFO |
|
450721ad5436
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|
830 /* |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
diff
changeset
|
831 mallinfo() |
|
450721ad5436
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parents:
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|
832 Returns (by copy) a struct containing various summary statistics: |
|
450721ad5436
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parents:
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|
833 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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changeset
|
834 arena: current total non-mmapped bytes allocated from system |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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|
835 ordblks: the number of free chunks |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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|
836 smblks: always zero. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
837 hblks: current number of mmapped regions |
|
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It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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|
838 hblkhd: total bytes held in mmapped regions |
|
450721ad5436
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|
839 usmblks: the maximum total allocated space. This will be greater |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
840 than current total if trimming has occurred. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
841 fsmblks: always zero |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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|
842 uordblks: current total allocated space (normal or mmapped) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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|
843 fordblks: total free space |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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|
844 keepcost: the maximum number of bytes that could ideally be released |
|
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parents:
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|
845 back to system via malloc_trim. ("ideally" means that |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
846 it ignores page restrictions etc.) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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|
847 |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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changeset
|
848 Because these fields are ints, but internal bookkeeping may |
|
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|
849 be kept as longs, the reported values may wrap around zero and |
|
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|
850 thus be inaccurate. |
|
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|
851 */ |
|
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|
852 struct mallinfo dlmallinfo(void); |
|
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|
853 #endif /* NO_MALLINFO */ |
|
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|
854 |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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|
855 /* |
|
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|
856 independent_calloc(size_t n_elements, size_t element_size, void* chunks[]); |
|
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|
857 |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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changeset
|
858 independent_calloc is similar to calloc, but instead of returning a |
|
450721ad5436
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|
859 single cleared space, it returns an array of pointers to n_elements |
|
450721ad5436
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|
860 independent elements that can hold contents of size elem_size, each |
|
450721ad5436
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parents:
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|
861 of which starts out cleared, and can be independently freed, |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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|
862 realloc'ed etc. The elements are guaranteed to be adjacently |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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|
863 allocated (this is not guaranteed to occur with multiple callocs or |
|
450721ad5436
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|
864 mallocs), which may also improve cache locality in some |
|
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parents:
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|
865 applications. |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
866 |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
867 The "chunks" argument is optional (i.e., may be null, which is |
|
450721ad5436
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|
868 probably the most typical usage). If it is null, the returned array |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
869 is itself dynamically allocated and should also be freed when it is |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
870 no longer needed. Otherwise, the chunks array must be of at least |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
871 n_elements in length. It is filled in with the pointers to the |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
872 chunks. |
|
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parents:
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changeset
|
873 |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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changeset
|
874 In either case, independent_calloc returns this pointer array, or |
|
450721ad5436
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parents:
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|
875 null if the allocation failed. If n_elements is zero and "chunks" |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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|
876 is null, it returns a chunk representing an array with zero elements |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
877 (which should be freed if not wanted). |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
878 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
879 Each element must be individually freed when it is no longer |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
880 needed. If you'd like to instead be able to free all at once, you |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
881 should instead use regular calloc and assign pointers into this |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
882 space to represent elements. (In this case though, you cannot |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
883 independently free elements.) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
884 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
885 independent_calloc simplifies and speeds up implementations of many |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
886 kinds of pools. It may also be useful when constructing large data |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
887 structures that initially have a fixed number of fixed-sized nodes, |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
888 but the number is not known at compile time, and some of the nodes |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
889 may later need to be freed. For example: |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
890 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
891 struct Node { int item; struct Node* next; }; |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
892 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
893 struct Node* build_list() { |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
894 struct Node** pool; |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
895 int n = read_number_of_nodes_needed(); |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
896 if (n <= 0) return 0; |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
897 pool = (struct Node**)(independent_calloc(n, sizeof(struct Node), 0); |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
898 if (pool == 0) die(); |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
899 // organize into a linked list... |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
900 struct Node* first = pool[0]; |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
901 for (i = 0; i < n-1; ++i) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
902 pool[i]->next = pool[i+1]; |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
903 free(pool); // Can now free the array (or not, if it is needed later) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
904 return first; |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
905 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
906 */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
907 void **dlindependent_calloc(size_t, size_t, void **); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
908 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
909 /* |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
910 independent_comalloc(size_t n_elements, size_t sizes[], void* chunks[]); |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
911 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
912 independent_comalloc allocates, all at once, a set of n_elements |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
913 chunks with sizes indicated in the "sizes" array. It returns |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
914 an array of pointers to these elements, each of which can be |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
915 independently freed, realloc'ed etc. The elements are guaranteed to |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
916 be adjacently allocated (this is not guaranteed to occur with |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
917 multiple callocs or mallocs), which may also improve cache locality |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
918 in some applications. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
919 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
920 The "chunks" argument is optional (i.e., may be null). If it is null |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
921 the returned array is itself dynamically allocated and should also |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
922 be freed when it is no longer needed. Otherwise, the chunks array |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
923 must be of at least n_elements in length. It is filled in with the |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
924 pointers to the chunks. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
925 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
926 In either case, independent_comalloc returns this pointer array, or |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
927 null if the allocation failed. If n_elements is zero and chunks is |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
928 null, it returns a chunk representing an array with zero elements |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
929 (which should be freed if not wanted). |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
930 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
931 Each element must be individually freed when it is no longer |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
932 needed. If you'd like to instead be able to free all at once, you |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
933 should instead use a single regular malloc, and assign pointers at |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
934 particular offsets in the aggregate space. (In this case though, you |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
935 cannot independently free elements.) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
936 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
937 independent_comallac differs from independent_calloc in that each |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
938 element may have a different size, and also that it does not |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
939 automatically clear elements. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
940 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
941 independent_comalloc can be used to speed up allocation in cases |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
942 where several structs or objects must always be allocated at the |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
943 same time. For example: |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
944 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
945 struct Head { ... } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
946 struct Foot { ... } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
947 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
948 void send_message(char* msg) { |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
949 int msglen = strlen(msg); |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
950 size_t sizes[3] = { sizeof(struct Head), msglen, sizeof(struct Foot) }; |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
951 void* chunks[3]; |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
952 if (independent_comalloc(3, sizes, chunks) == 0) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
953 die(); |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
954 struct Head* head = (struct Head*)(chunks[0]); |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
955 char* body = (char*)(chunks[1]); |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
956 struct Foot* foot = (struct Foot*)(chunks[2]); |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
957 // ... |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
958 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
959 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
960 In general though, independent_comalloc is worth using only for |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
961 larger values of n_elements. For small values, you probably won't |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
962 detect enough difference from series of malloc calls to bother. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
963 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
964 Overuse of independent_comalloc can increase overall memory usage, |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
965 since it cannot reuse existing noncontiguous small chunks that |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
966 might be available for some of the elements. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
967 */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
968 void **dlindependent_comalloc(size_t, size_t *, void **); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
969 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
970 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
971 /* |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
972 pvalloc(size_t n); |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
973 Equivalent to valloc(minimum-page-that-holds(n)), that is, |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
974 round up n to nearest pagesize. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
975 */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
976 void *dlpvalloc(size_t); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
977 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
978 /* |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
979 malloc_trim(size_t pad); |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
980 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
981 If possible, gives memory back to the system (via negative arguments |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
982 to sbrk) if there is unused memory at the `high' end of the malloc |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
983 pool or in unused MMAP segments. You can call this after freeing |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
984 large blocks of memory to potentially reduce the system-level memory |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
985 requirements of a program. However, it cannot guarantee to reduce |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
986 memory. Under some allocation patterns, some large free blocks of |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
987 memory will be locked between two used chunks, so they cannot be |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
988 given back to the system. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
989 |
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
990 The `pad' argument to malloc_trim represents the amount of free |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
991 trailing space to leave untrimmed. If this argument is zero, only |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
992 the minimum amount of memory to maintain internal data structures |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
993 will be left. Non-zero arguments can be supplied to maintain enough |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
994 trailing space to service future expected allocations without having |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
995 to re-obtain memory from the system. |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
996 |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
997 Malloc_trim returns 1 if it actually released any memory, else 0. |
|
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|
998 */ |
|
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|
999 int dlmalloc_trim(size_t); |
|
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1000 |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
1001 /* |
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It's now possible to build SDL without any C runtime at all on Windows,
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|
1002 malloc_usable_size(void* p); |
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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1003 |
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
1004 Returns the number of bytes you can actually use in |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
1005 an allocated chunk, which may be more than you requested (although |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
1006 often not) due to alignment and minimum size constraints. |
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
1007 You can use this many bytes without worrying about |
|
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It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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|
1008 overwriting other allocated objects. This is not a particularly great |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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|
1009 programming practice. malloc_usable_size can be more useful in |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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|
1010 debugging and assertions, for example: |
|
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It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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|
1011 |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
1012 p = malloc(n); |
|
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It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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|
1013 assert(malloc_usable_size(p) >= 256); |
|
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It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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|
1014 */ |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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1465
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|
1015 size_t dlmalloc_usable_size(void *); |
|
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|
1016 |
|
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It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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|
1017 /* |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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|
1018 malloc_stats(); |
|
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It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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|
1019 Prints on stderr the amount of space obtained from the system (both |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1020 via sbrk and mmap), the maximum amount (which may be more than |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
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|
1021 current if malloc_trim and/or munmap got called), and the current |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
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|
1022 number of bytes allocated via malloc (or realloc, etc) but not yet |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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|
1023 freed. Note that this is the number of bytes allocated, not the |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
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|
1024 number requested. It will be larger than the number requested |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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|
1025 because of alignment and bookkeeping overhead. Because it includes |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
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|
1026 alignment wastage as being in use, this figure may be greater than |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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|
1027 zero even when no user-level chunks are allocated. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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|
1028 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1029 The reported current and maximum system memory can be inaccurate if |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1030 a program makes other calls to system memory allocation functions |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
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|
1031 (normally sbrk) outside of malloc. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1032 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1033 malloc_stats prints only the most commonly interesting statistics. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1034 More information can be obtained by calling mallinfo. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1035 */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
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|
1036 void dlmalloc_stats(void); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1037 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1038 #endif /* ONLY_MSPACES */ |
|
1330
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parents:
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|
1039 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1040 #if MSPACES |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1041 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1042 /* |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1043 mspace is an opaque type representing an independent |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1044 region of space that supports mspace_malloc, etc. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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|
1045 */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1046 typedef void *mspace; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
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|
1047 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1048 /* |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1049 create_mspace creates and returns a new independent space with the |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1050 given initial capacity, or, if 0, the default granularity size. It |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1051 returns null if there is no system memory available to create the |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1052 space. If argument locked is non-zero, the space uses a separate |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1053 lock to control access. The capacity of the space will grow |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1054 dynamically as needed to service mspace_malloc requests. You can |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1055 control the sizes of incremental increases of this space by |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1056 compiling with a different DEFAULT_GRANULARITY or dynamically |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1057 setting with mallopt(M_GRANULARITY, value). |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1058 */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
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|
1059 mspace create_mspace(size_t capacity, int locked); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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changeset
|
1060 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1061 /* |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1062 destroy_mspace destroys the given space, and attempts to return all |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1063 of its memory back to the system, returning the total number of |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1064 bytes freed. After destruction, the results of access to all memory |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1065 used by the space become undefined. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1066 */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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|
1067 size_t destroy_mspace(mspace msp); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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changeset
|
1068 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1069 /* |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1070 create_mspace_with_base uses the memory supplied as the initial base |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1071 of a new mspace. Part (less than 128*sizeof(size_t) bytes) of this |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1072 space is used for bookkeeping, so the capacity must be at least this |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1073 large. (Otherwise 0 is returned.) When this initial space is |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1074 exhausted, additional memory will be obtained from the system. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1075 Destroying this space will deallocate all additionally allocated |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1076 space (if possible) but not the initial base. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1077 */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
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changeset
|
1078 mspace create_mspace_with_base(void *base, size_t capacity, int locked); |
|
1330
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It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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changeset
|
1079 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1080 /* |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1081 mspace_malloc behaves as malloc, but operates within |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1082 the given space. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1083 */ |
|
1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
1084 void *mspace_malloc(mspace msp, size_t bytes); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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changeset
|
1085 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1086 /* |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1087 mspace_free behaves as free, but operates within |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1088 the given space. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1089 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1090 If compiled with FOOTERS==1, mspace_free is not actually needed. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1091 free may be called instead of mspace_free because freed chunks from |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1092 any space are handled by their originating spaces. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1093 */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1094 void mspace_free(mspace msp, void *mem); |
|
1330
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It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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changeset
|
1095 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1096 /* |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1097 mspace_realloc behaves as realloc, but operates within |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1098 the given space. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1099 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1100 If compiled with FOOTERS==1, mspace_realloc is not actually |
|
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|
1101 needed. realloc may be called instead of mspace_realloc because |
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|
1102 realloced chunks from any space are handled by their originating |
|
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1103 spaces. |
|
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|
1104 */ |
|
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1105 void *mspace_realloc(mspace msp, void *mem, size_t newsize); |
|
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1106 |
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|
1107 /* |
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|
1108 mspace_calloc behaves as calloc, but operates within |
|
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1109 the given space. |
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1110 */ |
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1111 void *mspace_calloc(mspace msp, size_t n_elements, size_t elem_size); |
|
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1112 |
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|
1113 /* |
|
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|
1114 mspace_memalign behaves as memalign, but operates within |
|
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1115 the given space. |
|
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|
1116 */ |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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1117 void *mspace_memalign(mspace msp, size_t alignment, size_t bytes); |
|
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1118 |
|
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|
1119 /* |
|
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|
1120 mspace_independent_calloc behaves as independent_calloc, but |
|
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|
1121 operates within the given space. |
|
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|
1122 */ |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1123 void **mspace_independent_calloc(mspace msp, size_t n_elements, |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1124 size_t elem_size, void *chunks[]); |
|
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1125 |
|
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|
1126 /* |
|
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|
1127 mspace_independent_comalloc behaves as independent_comalloc, but |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
1128 operates within the given space. |
|
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It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
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|
1129 */ |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1130 void **mspace_independent_comalloc(mspace msp, size_t n_elements, |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1131 size_t sizes[], void *chunks[]); |
|
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1132 |
|
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|
1133 /* |
|
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|
1134 mspace_footprint() returns the number of bytes obtained from the |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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|
1135 system for this space. |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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|
1136 */ |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1137 size_t mspace_footprint(mspace msp); |
|
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|
1138 |
|
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|
1139 /* |
|
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parents:
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|
1140 mspace_max_footprint() returns the peak number of bytes obtained from the |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
1141 system for this space. |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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|
1142 */ |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1143 size_t mspace_max_footprint(mspace msp); |
|
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1144 |
|
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|
1145 |
|
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|
1146 #if !NO_MALLINFO |
|
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|
1147 /* |
|
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|
1148 mspace_mallinfo behaves as mallinfo, but reports properties of |
|
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|
1149 the given space. |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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|
1150 */ |
|
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|
1151 struct mallinfo mspace_mallinfo(mspace msp); |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1152 #endif /* NO_MALLINFO */ |
|
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1153 |
|
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|
1154 /* |
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|
1155 mspace_malloc_stats behaves as malloc_stats, but reports |
|
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|
1156 properties of the given space. |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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|
1157 */ |
|
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|
1158 void mspace_malloc_stats(mspace msp); |
|
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1159 |
|
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|
1160 /* |
|
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|
1161 mspace_trim behaves as malloc_trim, but |
|
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|
1162 operates within the given space. |
|
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|
1163 */ |
|
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|
1164 int mspace_trim(mspace msp, size_t pad); |
|
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1165 |
|
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|
1166 /* |
|
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|
1167 An alias for mallopt. |
|
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|
1168 */ |
|
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|
1169 int mspace_mallopt(int, int); |
|
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1170 |
|
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|
1171 #endif /* MSPACES */ |
|
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|
1172 |
|
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|
1173 #ifdef __cplusplus |
|
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|
1174 }; /* end of extern "C" */ |
|
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|
1175 #endif /* __cplusplus */ |
|
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|
1176 |
|
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|
1177 /* |
|
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|
1178 ======================================================================== |
|
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|
1179 To make a fully customizable malloc.h header file, cut everything |
|
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|
1180 above this line, put into file malloc.h, edit to suit, and #include it |
|
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|
1181 on the next line, as well as in programs that use this malloc. |
|
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|
1182 ======================================================================== |
|
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|
1183 */ |
|
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|
1184 |
|
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|
1185 /* #include "malloc.h" */ |
|
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|
1186 |
|
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|
1187 /*------------------------------ internal #includes ---------------------- */ |
|
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|
1188 |
|
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|
1189 #ifdef _MSC_VER |
|
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1190 #pragma warning( disable : 4146 ) /* no "unsigned" warnings */ |
|
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|
1191 #endif /* _MSC_VER */ |
|
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|
1192 |
|
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|
1193 #ifndef LACKS_STDIO_H |
|
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1194 #include <stdio.h> /* for printing in malloc_stats */ |
|
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|
1195 #endif |
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1196 |
|
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|
1197 #ifndef LACKS_ERRNO_H |
|
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|
1198 #include <errno.h> /* for MALLOC_FAILURE_ACTION */ |
|
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|
1199 #endif /* LACKS_ERRNO_H */ |
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|
1200 #if FOOTERS |
|
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|
1201 #include <time.h> /* for magic initialization */ |
|
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|
1202 #endif /* FOOTERS */ |
|
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|
1203 #ifndef LACKS_STDLIB_H |
|
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|
1204 #include <stdlib.h> /* for abort() */ |
|
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|
1205 #endif /* LACKS_STDLIB_H */ |
|
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|
1206 #ifdef DEBUG |
|
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|
1207 #if ABORT_ON_ASSERT_FAILURE |
|
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|
1208 #define assert(x) if(!(x)) ABORT |
|
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|
1209 #else /* ABORT_ON_ASSERT_FAILURE */ |
|
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|
1210 #include <assert.h> |
|
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Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1211 #endif /* ABORT_ON_ASSERT_FAILURE */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1212 #else /* DEBUG */ |
|
1330
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It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1213 #define assert(x) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1214 #endif /* DEBUG */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1215 #ifndef LACKS_STRING_H |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1216 #include <string.h> /* for memset etc */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1217 #endif /* LACKS_STRING_H */ |
|
1330
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It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1218 #if USE_BUILTIN_FFS |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1219 #ifndef LACKS_STRINGS_H |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1220 #include <strings.h> /* for ffs */ |
|
1330
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It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1221 #endif /* LACKS_STRINGS_H */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1222 #endif /* USE_BUILTIN_FFS */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1223 #if HAVE_MMAP |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1224 #ifndef LACKS_SYS_MMAN_H |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1225 #include <sys/mman.h> /* for mmap */ |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1226 #endif /* LACKS_SYS_MMAN_H */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1227 #ifndef LACKS_FCNTL_H |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1228 #include <fcntl.h> |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1229 #endif /* LACKS_FCNTL_H */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1230 #endif /* HAVE_MMAP */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1231 #if HAVE_MORECORE |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1232 #ifndef LACKS_UNISTD_H |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1233 #include <unistd.h> /* for sbrk */ |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1234 #else /* LACKS_UNISTD_H */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1235 #if !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__NetBSD__) |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1236 extern void *sbrk(ptrdiff_t); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1237 #endif /* FreeBSD etc */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1238 #endif /* LACKS_UNISTD_H */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1239 #endif /* HAVE_MMAP */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1240 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1241 #ifndef WIN32 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1242 #ifndef malloc_getpagesize |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1243 # ifdef _SC_PAGESIZE /* some SVR4 systems omit an underscore */ |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1244 # ifndef _SC_PAGE_SIZE |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1245 # define _SC_PAGE_SIZE _SC_PAGESIZE |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1246 # endif |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1247 # endif |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1248 # ifdef _SC_PAGE_SIZE |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1249 # define malloc_getpagesize sysconf(_SC_PAGE_SIZE) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1250 # else |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1251 # if defined(BSD) || defined(DGUX) || defined(HAVE_GETPAGESIZE) |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1252 extern size_t getpagesize(); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1253 # define malloc_getpagesize getpagesize() |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1254 # else |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1255 # ifdef WIN32 /* use supplied emulation of getpagesize */ |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1256 # define malloc_getpagesize getpagesize() |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1257 # else |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1258 # ifndef LACKS_SYS_PARAM_H |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1259 # include <sys/param.h> |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1260 # endif |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1261 # ifdef EXEC_PAGESIZE |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1262 # define malloc_getpagesize EXEC_PAGESIZE |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1263 # else |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1264 # ifdef NBPG |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1265 # ifndef CLSIZE |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1266 # define malloc_getpagesize NBPG |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1267 # else |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1268 # define malloc_getpagesize (NBPG * CLSIZE) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1269 # endif |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1270 # else |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1271 # ifdef NBPC |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1272 # define malloc_getpagesize NBPC |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1273 # else |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1274 # ifdef PAGESIZE |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1275 # define malloc_getpagesize PAGESIZE |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1276 # else /* just guess */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1277 # define malloc_getpagesize ((size_t)4096U) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1278 # endif |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1279 # endif |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1280 # endif |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1281 # endif |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1282 # endif |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1283 # endif |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1284 # endif |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1285 #endif |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1286 #endif |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1287 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1288 /* ------------------- size_t and alignment properties -------------------- */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1289 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1290 /* The byte and bit size of a size_t */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1291 #define SIZE_T_SIZE (sizeof(size_t)) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1292 #define SIZE_T_BITSIZE (sizeof(size_t) << 3) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1293 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1294 /* Some constants coerced to size_t */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1295 /* Annoying but necessary to avoid errors on some plaftorms */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1296 #define SIZE_T_ZERO ((size_t)0) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1297 #define SIZE_T_ONE ((size_t)1) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1298 #define SIZE_T_TWO ((size_t)2) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1299 #define TWO_SIZE_T_SIZES (SIZE_T_SIZE<<1) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1300 #define FOUR_SIZE_T_SIZES (SIZE_T_SIZE<<2) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1301 #define SIX_SIZE_T_SIZES (FOUR_SIZE_T_SIZES+TWO_SIZE_T_SIZES) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1302 #define HALF_MAX_SIZE_T (MAX_SIZE_T / 2U) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1303 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1304 /* The bit mask value corresponding to MALLOC_ALIGNMENT */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1305 #define CHUNK_ALIGN_MASK (MALLOC_ALIGNMENT - SIZE_T_ONE) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1306 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1307 /* True if address a has acceptable alignment */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1308 #define is_aligned(A) (((size_t)((A)) & (CHUNK_ALIGN_MASK)) == 0) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1309 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1310 /* the number of bytes to offset an address to align it */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1311 #define align_offset(A)\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1312 ((((size_t)(A) & CHUNK_ALIGN_MASK) == 0)? 0 :\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1313 ((MALLOC_ALIGNMENT - ((size_t)(A) & CHUNK_ALIGN_MASK)) & CHUNK_ALIGN_MASK)) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1314 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1315 /* -------------------------- MMAP preliminaries ------------------------- */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1316 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1317 /* |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1318 If HAVE_MORECORE or HAVE_MMAP are false, we just define calls and |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1319 checks to fail so compiler optimizer can delete code rather than |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1320 using so many "#if"s. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1321 */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
diff
changeset
|
1322 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1323 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1324 /* MORECORE and MMAP must return MFAIL on failure */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1325 #define MFAIL ((void*)(MAX_SIZE_T)) |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1326 #define CMFAIL ((char*)(MFAIL)) /* defined for convenience */ |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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changeset
|
1327 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1328 #if !HAVE_MMAP |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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changeset
|
1329 #define IS_MMAPPED_BIT (SIZE_T_ZERO) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1330 #define USE_MMAP_BIT (SIZE_T_ZERO) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1331 #define CALL_MMAP(s) MFAIL |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1332 #define CALL_MUNMAP(a, s) (-1) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1333 #define DIRECT_MMAP(s) MFAIL |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1334 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1335 #else /* HAVE_MMAP */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1336 #define IS_MMAPPED_BIT (SIZE_T_ONE) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1337 #define USE_MMAP_BIT (SIZE_T_ONE) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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changeset
|
1338 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1339 #ifndef WIN32 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1340 #define CALL_MUNMAP(a, s) munmap((a), (s)) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
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|
1341 #define MMAP_PROT (PROT_READ|PROT_WRITE) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1342 #if !defined(MAP_ANONYMOUS) && defined(MAP_ANON) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1343 #define MAP_ANONYMOUS MAP_ANON |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1344 #endif /* MAP_ANON */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1345 #ifdef MAP_ANONYMOUS |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1346 #define MMAP_FLAGS (MAP_PRIVATE|MAP_ANONYMOUS) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1347 #define CALL_MMAP(s) mmap(0, (s), MMAP_PROT, MMAP_FLAGS, -1, 0) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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changeset
|
1348 #else /* MAP_ANONYMOUS */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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changeset
|
1349 /* |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1350 Nearly all versions of mmap support MAP_ANONYMOUS, so the following |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1351 is unlikely to be needed, but is supplied just in case. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1352 */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1353 #define MMAP_FLAGS (MAP_PRIVATE) |
|
1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
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|
1354 static int dev_zero_fd = -1; /* Cached file descriptor for /dev/zero. */ |
|
1330
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It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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|
1355 #define CALL_MMAP(s) ((dev_zero_fd < 0) ? \ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1356 (dev_zero_fd = open("/dev/zero", O_RDWR), \ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1357 mmap(0, (s), MMAP_PROT, MMAP_FLAGS, dev_zero_fd, 0)) : \ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1358 mmap(0, (s), MMAP_PROT, MMAP_FLAGS, dev_zero_fd, 0)) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1359 #endif /* MAP_ANONYMOUS */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1360 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1361 #define DIRECT_MMAP(s) CALL_MMAP(s) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1362 #else /* WIN32 */ |
|
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It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1363 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1364 /* Win32 MMAP via VirtualAlloc */ |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
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|
1365 static void * |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1366 win32mmap(size_t size) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1367 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1368 void *ptr = |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1369 VirtualAlloc(0, size, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1370 return (ptr != 0) ? ptr : MFAIL; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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changeset
|
1371 } |
|
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It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1372 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1373 /* For direct MMAP, use MEM_TOP_DOWN to minimize interference */ |
|
1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1374 static void * |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1375 win32direct_mmap(size_t size) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1376 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1377 void *ptr = VirtualAlloc(0, size, MEM_RESERVE | MEM_COMMIT | MEM_TOP_DOWN, |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1378 PAGE_READWRITE); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1379 return (ptr != 0) ? ptr : MFAIL; |
|
1330
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Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1380 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1381 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1382 /* This function supports releasing coalesed segments */ |
|
1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1383 static int |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1384 win32munmap(void *ptr, size_t size) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1385 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1386 MEMORY_BASIC_INFORMATION minfo; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1387 char *cptr = ptr; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1388 while (size) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1389 if (VirtualQuery(cptr, &minfo, sizeof(minfo)) == 0) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1390 return -1; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1391 if (minfo.BaseAddress != cptr || minfo.AllocationBase != cptr || |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1392 minfo.State != MEM_COMMIT || minfo.RegionSize > size) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1393 return -1; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1394 if (VirtualFree(cptr, 0, MEM_RELEASE) == 0) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1395 return -1; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1396 cptr += minfo.RegionSize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1397 size -= minfo.RegionSize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1398 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1399 return 0; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1400 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1401 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1402 #define CALL_MMAP(s) win32mmap(s) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1403 #define CALL_MUNMAP(a, s) win32munmap((a), (s)) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1404 #define DIRECT_MMAP(s) win32direct_mmap(s) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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changeset
|
1405 #endif /* WIN32 */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1406 #endif /* HAVE_MMAP */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1407 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1408 #if HAVE_MMAP && HAVE_MREMAP |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1409 #define CALL_MREMAP(addr, osz, nsz, mv) mremap((addr), (osz), (nsz), (mv)) |
|
1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1410 #else /* HAVE_MMAP && HAVE_MREMAP */ |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1411 #define CALL_MREMAP(addr, osz, nsz, mv) MFAIL |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1412 #endif /* HAVE_MMAP && HAVE_MREMAP */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1413 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1414 #if HAVE_MORECORE |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1415 #define CALL_MORECORE(S) MORECORE(S) |
|
1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1416 #else /* HAVE_MORECORE */ |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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changeset
|
1417 #define CALL_MORECORE(S) MFAIL |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1418 #endif /* HAVE_MORECORE */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1419 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1420 /* mstate bit set if continguous morecore disabled or failed */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1421 #define USE_NONCONTIGUOUS_BIT (4U) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1422 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1423 /* segment bit set in create_mspace_with_base */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1424 #define EXTERN_BIT (8U) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1425 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1426 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1427 /* --------------------------- Lock preliminaries ------------------------ */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1428 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1429 #if USE_LOCKS |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1430 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1431 /* |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1432 When locks are defined, there are up to two global locks: |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1433 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1434 * If HAVE_MORECORE, morecore_mutex protects sequences of calls to |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1435 MORECORE. In many cases sys_alloc requires two calls, that should |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1436 not be interleaved with calls by other threads. This does not |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1437 protect against direct calls to MORECORE by other threads not |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1438 using this lock, so there is still code to cope the best we can on |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1439 interference. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1440 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1441 * magic_init_mutex ensures that mparams.magic and other |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1442 unique mparams values are initialized only once. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1443 */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1444 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1445 #ifndef WIN32 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1446 /* By default use posix locks */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1447 #include <pthread.h> |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1448 #define MLOCK_T pthread_mutex_t |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1449 #define INITIAL_LOCK(l) pthread_mutex_init(l, NULL) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1450 #define ACQUIRE_LOCK(l) pthread_mutex_lock(l) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1451 #define RELEASE_LOCK(l) pthread_mutex_unlock(l) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1452 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1453 #if HAVE_MORECORE |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1454 static MLOCK_T morecore_mutex = PTHREAD_MUTEX_INITIALIZER; |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1455 #endif /* HAVE_MORECORE */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1456 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1457 static MLOCK_T magic_init_mutex = PTHREAD_MUTEX_INITIALIZER; |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1458 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1459 #else /* WIN32 */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1460 /* |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1461 Because lock-protected regions have bounded times, and there |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1462 are no recursive lock calls, we can use simple spinlocks. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1463 */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1464 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1465 #define MLOCK_T long |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1466 static int |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1467 win32_acquire_lock(MLOCK_T * sl) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1468 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1469 for (;;) { |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1470 #ifdef InterlockedCompareExchangePointer |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1471 if (!InterlockedCompareExchange(sl, 1, 0)) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1472 return 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1473 #else /* Use older void* version */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1474 if (!InterlockedCompareExchange((void **) sl, (void *) 1, (void *) 0)) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1475 return 0; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1476 #endif /* InterlockedCompareExchangePointer */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1477 Sleep(0); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1478 } |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1479 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1480 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1481 static void |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1482 win32_release_lock(MLOCK_T * sl) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1483 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1484 InterlockedExchange(sl, 0); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1485 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1486 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1487 #define INITIAL_LOCK(l) *(l)=0 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1488 #define ACQUIRE_LOCK(l) win32_acquire_lock(l) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1489 #define RELEASE_LOCK(l) win32_release_lock(l) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1490 #if HAVE_MORECORE |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1491 static MLOCK_T morecore_mutex; |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1492 #endif /* HAVE_MORECORE */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1493 static MLOCK_T magic_init_mutex; |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1494 #endif /* WIN32 */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1495 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1496 #define USE_LOCK_BIT (2U) |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1497 #else /* USE_LOCKS */ |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1498 #define USE_LOCK_BIT (0U) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1499 #define INITIAL_LOCK(l) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1500 #endif /* USE_LOCKS */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1501 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1502 #if USE_LOCKS && HAVE_MORECORE |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1503 #define ACQUIRE_MORECORE_LOCK() ACQUIRE_LOCK(&morecore_mutex); |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1504 #define RELEASE_MORECORE_LOCK() RELEASE_LOCK(&morecore_mutex); |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1505 #else /* USE_LOCKS && HAVE_MORECORE */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1506 #define ACQUIRE_MORECORE_LOCK() |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1507 #define RELEASE_MORECORE_LOCK() |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1508 #endif /* USE_LOCKS && HAVE_MORECORE */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1509 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1510 #if USE_LOCKS |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1511 #define ACQUIRE_MAGIC_INIT_LOCK() ACQUIRE_LOCK(&magic_init_mutex); |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1512 #define RELEASE_MAGIC_INIT_LOCK() RELEASE_LOCK(&magic_init_mutex); |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1513 #else /* USE_LOCKS */ |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1514 #define ACQUIRE_MAGIC_INIT_LOCK() |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1515 #define RELEASE_MAGIC_INIT_LOCK() |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1516 #endif /* USE_LOCKS */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1517 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1518 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1519 /* ----------------------- Chunk representations ------------------------ */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1520 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1521 /* |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1522 (The following includes lightly edited explanations by Colin Plumb.) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1523 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1524 The malloc_chunk declaration below is misleading (but accurate and |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1525 necessary). It declares a "view" into memory allowing access to |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1526 necessary fields at known offsets from a given base. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1527 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1528 Chunks of memory are maintained using a `boundary tag' method as |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1529 originally described by Knuth. (See the paper by Paul Wilson |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1530 ftp://ftp.cs.utexas.edu/pub/garbage/allocsrv.ps for a survey of such |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1531 techniques.) Sizes of free chunks are stored both in the front of |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1532 each chunk and at the end. This makes consolidating fragmented |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1533 chunks into bigger chunks fast. The head fields also hold bits |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1534 representing whether chunks are free or in use. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1535 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1536 Here are some pictures to make it clearer. They are "exploded" to |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1537 show that the state of a chunk can be thought of as extending from |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1538 the high 31 bits of the head field of its header through the |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1539 prev_foot and PINUSE_BIT bit of the following chunk header. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1540 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1541 A chunk that's in use looks like: |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1542 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1543 chunk-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1544 | Size of previous chunk (if P = 1) | |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1545 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1546 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |P| |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1547 | Size of this chunk 1| +-+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1548 mem-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1549 | | |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1550 +- -+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1551 | | |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1552 +- -+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1553 | : |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1554 +- size - sizeof(size_t) available payload bytes -+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1555 : | |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1556 chunk-> +- -+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1557 | | |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1558 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1559 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |1| |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1560 | Size of next chunk (may or may not be in use) | +-+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1561 mem-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1562 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1563 And if it's free, it looks like this: |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1564 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1565 chunk-> +- -+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1566 | User payload (must be in use, or we would have merged!) | |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1567 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1568 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |P| |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1569 | Size of this chunk 0| +-+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1570 mem-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1571 | Next pointer | |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1572 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1573 | Prev pointer | |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1574 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1575 | : |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1576 +- size - sizeof(struct chunk) unused bytes -+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1577 : | |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1578 chunk-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1579 | Size of this chunk | |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1580 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1581 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |0| |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1582 | Size of next chunk (must be in use, or we would have merged)| +-+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1583 mem-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1584 | : |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1585 +- User payload -+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1586 : | |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1587 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1588 |0| |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1589 +-+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1590 Note that since we always merge adjacent free chunks, the chunks |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1591 adjacent to a free chunk must be in use. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1592 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1593 Given a pointer to a chunk (which can be derived trivially from the |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1594 payload pointer) we can, in O(1) time, find out whether the adjacent |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1595 chunks are free, and if so, unlink them from the lists that they |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1596 are on and merge them with the current chunk. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1597 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1598 Chunks always begin on even word boundaries, so the mem portion |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1599 (which is returned to the user) is also on an even word boundary, and |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1600 thus at least double-word aligned. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1601 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1602 The P (PINUSE_BIT) bit, stored in the unused low-order bit of the |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1603 chunk size (which is always a multiple of two words), is an in-use |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1604 bit for the *previous* chunk. If that bit is *clear*, then the |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1605 word before the current chunk size contains the previous chunk |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1606 size, and can be used to find the front of the previous chunk. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1607 The very first chunk allocated always has this bit set, preventing |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1608 access to non-existent (or non-owned) memory. If pinuse is set for |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1609 any given chunk, then you CANNOT determine the size of the |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1610 previous chunk, and might even get a memory addressing fault when |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1611 trying to do so. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1612 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1613 The C (CINUSE_BIT) bit, stored in the unused second-lowest bit of |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1614 the chunk size redundantly records whether the current chunk is |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1615 inuse. This redundancy enables usage checks within free and realloc, |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1616 and reduces indirection when freeing and consolidating chunks. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1617 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1618 Each freshly allocated chunk must have both cinuse and pinuse set. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1619 That is, each allocated chunk borders either a previously allocated |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1620 and still in-use chunk, or the base of its memory arena. This is |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1621 ensured by making all allocations from the the `lowest' part of any |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1622 found chunk. Further, no free chunk physically borders another one, |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1623 so each free chunk is known to be preceded and followed by either |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1624 inuse chunks or the ends of memory. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1625 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1626 Note that the `foot' of the current chunk is actually represented |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1627 as the prev_foot of the NEXT chunk. This makes it easier to |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1628 deal with alignments etc but can be very confusing when trying |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1629 to extend or adapt this code. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1630 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1631 The exceptions to all this are |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1632 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1633 1. The special chunk `top' is the top-most available chunk (i.e., |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1634 the one bordering the end of available memory). It is treated |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1635 specially. Top is never included in any bin, is used only if |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1636 no other chunk is available, and is released back to the |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1637 system if it is very large (see M_TRIM_THRESHOLD). In effect, |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1638 the top chunk is treated as larger (and thus less well |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1639 fitting) than any other available chunk. The top chunk |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1640 doesn't update its trailing size field since there is no next |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1641 contiguous chunk that would have to index off it. However, |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1642 space is still allocated for it (TOP_FOOT_SIZE) to enable |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1643 separation or merging when space is extended. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1644 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1645 3. Chunks allocated via mmap, which have the lowest-order bit |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1646 (IS_MMAPPED_BIT) set in their prev_foot fields, and do not set |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1647 PINUSE_BIT in their head fields. Because they are allocated |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1648 one-by-one, each must carry its own prev_foot field, which is |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1649 also used to hold the offset this chunk has within its mmapped |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1650 region, which is needed to preserve alignment. Each mmapped |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1651 chunk is trailed by the first two fields of a fake next-chunk |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1652 for sake of usage checks. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1653 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1654 */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1655 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1656 struct malloc_chunk |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1657 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1658 size_t prev_foot; /* Size of previous chunk (if free). */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1659 size_t head; /* Size and inuse bits. */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1660 struct malloc_chunk *fd; /* double links -- used only if free. */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1661 struct malloc_chunk *bk; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1662 }; |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1663 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1664 typedef struct malloc_chunk mchunk; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1665 typedef struct malloc_chunk *mchunkptr; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1666 typedef struct malloc_chunk *sbinptr; /* The type of bins of chunks */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1667 typedef size_t bindex_t; /* Described below */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1668 typedef unsigned int binmap_t; /* Described below */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
1669 typedef unsigned int flag_t; /* The type of various bit flag sets */ |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1670 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1671 /* ------------------- Chunks sizes and alignments ----------------------- */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1672 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1673 #define MCHUNK_SIZE (sizeof(mchunk)) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1674 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1675 #if FOOTERS |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1676 #define CHUNK_OVERHEAD (TWO_SIZE_T_SIZES) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1677 #else /* FOOTERS */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1678 #define CHUNK_OVERHEAD (SIZE_T_SIZE) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1679 #endif /* FOOTERS */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1680 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1681 /* MMapped chunks need a second word of overhead ... */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1682 #define MMAP_CHUNK_OVERHEAD (TWO_SIZE_T_SIZES) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1683 /* ... and additional padding for fake next-chunk at foot */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1684 #define MMAP_FOOT_PAD (FOUR_SIZE_T_SIZES) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1685 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1686 /* The smallest size we can malloc is an aligned minimal chunk */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1687 #define MIN_CHUNK_SIZE\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1688 ((MCHUNK_SIZE + CHUNK_ALIGN_MASK) & ~CHUNK_ALIGN_MASK) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1689 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1690 /* conversion from malloc headers to user pointers, and back */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1691 #define chunk2mem(p) ((void*)((char*)(p) + TWO_SIZE_T_SIZES)) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1692 #define mem2chunk(mem) ((mchunkptr)((char*)(mem) - TWO_SIZE_T_SIZES)) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1693 /* chunk associated with aligned address A */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1694 #define align_as_chunk(A) (mchunkptr)((A) + align_offset(chunk2mem(A))) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1695 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1696 /* Bounds on request (not chunk) sizes. */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1697 #define MAX_REQUEST ((-MIN_CHUNK_SIZE) << 2) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1698 #define MIN_REQUEST (MIN_CHUNK_SIZE - CHUNK_OVERHEAD - SIZE_T_ONE) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1699 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1700 /* pad request bytes into a usable size */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1701 #define pad_request(req) \ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1702 (((req) + CHUNK_OVERHEAD + CHUNK_ALIGN_MASK) & ~CHUNK_ALIGN_MASK) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1703 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1704 /* pad request, checking for minimum (but not maximum) */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1705 #define request2size(req) \ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1706 (((req) < MIN_REQUEST)? MIN_CHUNK_SIZE : pad_request(req)) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1707 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1708 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1709 /* ------------------ Operations on head and foot fields ----------------- */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1710 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1711 /* |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1712 The head field of a chunk is or'ed with PINUSE_BIT when previous |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1713 adjacent chunk in use, and or'ed with CINUSE_BIT if this chunk is in |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1714 use. If the chunk was obtained with mmap, the prev_foot field has |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1715 IS_MMAPPED_BIT set, otherwise holding the offset of the base of the |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1716 mmapped region to the base of the chunk. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1717 */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1718 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1719 #define PINUSE_BIT (SIZE_T_ONE) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1720 #define CINUSE_BIT (SIZE_T_TWO) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1721 #define INUSE_BITS (PINUSE_BIT|CINUSE_BIT) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1722 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1723 /* Head value for fenceposts */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1724 #define FENCEPOST_HEAD (INUSE_BITS|SIZE_T_SIZE) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1725 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1726 /* extraction of fields from head words */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1727 #define cinuse(p) ((p)->head & CINUSE_BIT) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1728 #define pinuse(p) ((p)->head & PINUSE_BIT) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1729 #define chunksize(p) ((p)->head & ~(INUSE_BITS)) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1730 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1731 #define clear_pinuse(p) ((p)->head &= ~PINUSE_BIT) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1732 #define clear_cinuse(p) ((p)->head &= ~CINUSE_BIT) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1733 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1734 /* Treat space at ptr +/- offset as a chunk */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1735 #define chunk_plus_offset(p, s) ((mchunkptr)(((char*)(p)) + (s))) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1736 #define chunk_minus_offset(p, s) ((mchunkptr)(((char*)(p)) - (s))) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1737 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1738 /* Ptr to next or previous physical malloc_chunk. */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1739 #define next_chunk(p) ((mchunkptr)( ((char*)(p)) + ((p)->head & ~INUSE_BITS))) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1740 #define prev_chunk(p) ((mchunkptr)( ((char*)(p)) - ((p)->prev_foot) )) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1741 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1742 /* extract next chunk's pinuse bit */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1743 #define next_pinuse(p) ((next_chunk(p)->head) & PINUSE_BIT) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1744 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1745 /* Get/set size at footer */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1746 #define get_foot(p, s) (((mchunkptr)((char*)(p) + (s)))->prev_foot) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1747 #define set_foot(p, s) (((mchunkptr)((char*)(p) + (s)))->prev_foot = (s)) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1748 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1749 /* Set size, pinuse bit, and foot */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1750 #define set_size_and_pinuse_of_free_chunk(p, s)\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1751 ((p)->head = (s|PINUSE_BIT), set_foot(p, s)) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1752 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1753 /* Set size, pinuse bit, foot, and clear next pinuse */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1754 #define set_free_with_pinuse(p, s, n)\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1755 (clear_pinuse(n), set_size_and_pinuse_of_free_chunk(p, s)) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1756 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1757 #define is_mmapped(p)\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1758 (!((p)->head & PINUSE_BIT) && ((p)->prev_foot & IS_MMAPPED_BIT)) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1759 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1760 /* Get the internal overhead associated with chunk p */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1761 #define overhead_for(p)\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1762 (is_mmapped(p)? MMAP_CHUNK_OVERHEAD : CHUNK_OVERHEAD) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1763 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1764 /* Return true if malloced space is not necessarily cleared */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1765 #if MMAP_CLEARS |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1766 #define calloc_must_clear(p) (!is_mmapped(p)) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1767 #else /* MMAP_CLEARS */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1768 #define calloc_must_clear(p) (1) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1769 #endif /* MMAP_CLEARS */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1770 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1771 /* ---------------------- Overlaid data structures ----------------------- */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1772 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1773 /* |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1774 When chunks are not in use, they are treated as nodes of either |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1775 lists or trees. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1776 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1777 "Small" chunks are stored in circular doubly-linked lists, and look |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1778 like this: |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1779 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1780 chunk-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1781 | Size of previous chunk | |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1782 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1783 `head:' | Size of chunk, in bytes |P| |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1784 mem-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1785 | Forward pointer to next chunk in list | |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1786 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1787 | Back pointer to previous chunk in list | |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1788 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1789 | Unused space (may be 0 bytes long) . |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1790 . . |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1791 . | |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1792 nextchunk-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1793 `foot:' | Size of chunk, in bytes | |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1794 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1795 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1796 Larger chunks are kept in a form of bitwise digital trees (aka |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1797 tries) keyed on chunksizes. Because malloc_tree_chunks are only for |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1798 free chunks greater than 256 bytes, their size doesn't impose any |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1799 constraints on user chunk sizes. Each node looks like: |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1800 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1801 chunk-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1802 | Size of previous chunk | |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1803 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1804 `head:' | Size of chunk, in bytes |P| |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1805 mem-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1806 | Forward pointer to next chunk of same size | |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1807 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1808 | Back pointer to previous chunk of same size | |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1809 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1810 | Pointer to left child (child[0]) | |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1811 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1812 | Pointer to right child (child[1]) | |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1813 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1814 | Pointer to parent | |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1815 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1816 | bin index of this chunk | |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1817 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1818 | Unused space . |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1819 . | |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1820 nextchunk-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1821 `foot:' | Size of chunk, in bytes | |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1822 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1823 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1824 Each tree holding treenodes is a tree of unique chunk sizes. Chunks |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1825 of the same size are arranged in a circularly-linked list, with only |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1826 the oldest chunk (the next to be used, in our FIFO ordering) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1827 actually in the tree. (Tree members are distinguished by a non-null |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1828 parent pointer.) If a chunk with the same size an an existing node |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1829 is inserted, it is linked off the existing node using pointers that |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1830 work in the same way as fd/bk pointers of small chunks. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1831 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1832 Each tree contains a power of 2 sized range of chunk sizes (the |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1833 smallest is 0x100 <= x < 0x180), which is is divided in half at each |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1834 tree level, with the chunks in the smaller half of the range (0x100 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1835 <= x < 0x140 for the top nose) in the left subtree and the larger |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1836 half (0x140 <= x < 0x180) in the right subtree. This is, of course, |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1837 done by inspecting individual bits. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1838 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1839 Using these rules, each node's left subtree contains all smaller |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1840 sizes than its right subtree. However, the node at the root of each |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1841 subtree has no particular ordering relationship to either. (The |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1842 dividing line between the subtree sizes is based on trie relation.) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1843 If we remove the last chunk of a given size from the interior of the |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1844 tree, we need to replace it with a leaf node. The tree ordering |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1845 rules permit a node to be replaced by any leaf below it. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1846 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1847 The smallest chunk in a tree (a common operation in a best-fit |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1848 allocator) can be found by walking a path to the leftmost leaf in |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1849 the tree. Unlike a usual binary tree, where we follow left child |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1850 pointers until we reach a null, here we follow the right child |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1851 pointer any time the left one is null, until we reach a leaf with |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1852 both child pointers null. The smallest chunk in the tree will be |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1853 somewhere along that path. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1854 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1855 The worst case number of steps to add, find, or remove a node is |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1856 bounded by the number of bits differentiating chunks within |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1857 bins. Under current bin calculations, this ranges from 6 up to 21 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
1858 (for 32 bit sizes) or up to 53 (for 64 bit sizes). The typical case |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
1859 is of course much better. |
|
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parents:
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1860 */ |
|
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1861 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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1862 struct malloc_tree_chunk |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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1863 { |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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1864 /* The first four fields must be compatible with malloc_chunk */ |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1865 size_t prev_foot; |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1866 size_t head; |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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1867 struct malloc_tree_chunk *fd; |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1868 struct malloc_tree_chunk *bk; |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1869 |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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1870 struct malloc_tree_chunk *child[2]; |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1871 struct malloc_tree_chunk *parent; |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1872 bindex_t index; |
|
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1873 }; |
|
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1874 |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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1875 typedef struct malloc_tree_chunk tchunk; |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1876 typedef struct malloc_tree_chunk *tchunkptr; |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1877 typedef struct malloc_tree_chunk *tbinptr; /* The type of bins of trees */ |
|
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1878 |
|
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|
1879 /* A little helper macro for trees */ |
|
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1880 #define leftmost_child(t) ((t)->child[0] != 0? (t)->child[0] : (t)->child[1]) |
|
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1881 |
|
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|
1882 /* ----------------------------- Segments -------------------------------- */ |
|
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1883 |
|
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|
1884 /* |
|
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|
1885 Each malloc space may include non-contiguous segments, held in a |
|
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|
1886 list headed by an embedded malloc_segment record representing the |
|
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|
1887 top-most space. Segments also include flags holding properties of |
|
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1888 the space. Large chunks that are directly allocated by mmap are not |
|
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1889 included in this list. They are instead independently created and |
|
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|
1890 destroyed without otherwise keeping track of them. |
|
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1891 |
|
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|
1892 Segment management mainly comes into play for spaces allocated by |
|
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1893 MMAP. Any call to MMAP might or might not return memory that is |
|
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1894 adjacent to an existing segment. MORECORE normally contiguously |
|
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1895 extends the current space, so this space is almost always adjacent, |
|
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1896 which is simpler and faster to deal with. (This is why MORECORE is |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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1897 used preferentially to MMAP when both are available -- see |
|
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|
1898 sys_alloc.) When allocating using MMAP, we don't use any of the |
|
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1899 hinting mechanisms (inconsistently) supported in various |
|
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1900 implementations of unix mmap, or distinguish reserving from |
|
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1901 committing memory. Instead, we just ask for space, and exploit |
|
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1902 contiguity when we get it. It is probably possible to do |
|
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1903 better than this on some systems, but no general scheme seems |
|
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1904 to be significantly better. |
|
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1905 |
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1906 Management entails a simpler variant of the consolidation scheme |
|
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1907 used for chunks to reduce fragmentation -- new adjacent memory is |
|
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1908 normally prepended or appended to an existing segment. However, |
|
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1909 there are limitations compared to chunk consolidation that mostly |
|
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1910 reflect the fact that segment processing is relatively infrequent |
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1911 (occurring only when getting memory from system) and that we |
|
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1912 don't expect to have huge numbers of segments: |
|
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1913 |
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1914 * Segments are not indexed, so traversal requires linear scans. (It |
|
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1915 would be possible to index these, but is not worth the extra |
|
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1916 overhead and complexity for most programs on most platforms.) |
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1917 * New segments are only appended to old ones when holding top-most |
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1918 memory; if they cannot be prepended to others, they are held in |
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1919 different segments. |
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1920 |
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1921 Except for the top-most segment of an mstate, each segment record |
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1922 is kept at the tail of its segment. Segments are added by pushing |
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1923 segment records onto the list headed by &mstate.seg for the |
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1924 containing mstate. |
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1925 |
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1926 Segment flags control allocation/merge/deallocation policies: |
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1927 * If EXTERN_BIT set, then we did not allocate this segment, |
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1928 and so should not try to deallocate or merge with others. |
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1929 (This currently holds only for the initial segment passed |
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1930 into create_mspace_with_base.) |
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1931 * If IS_MMAPPED_BIT set, the segment may be merged with |
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1932 other surrounding mmapped segments and trimmed/de-allocated |
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1933 using munmap. |
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1934 * If neither bit is set, then the segment was obtained using |
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1935 MORECORE so can be merged with surrounding MORECORE'd segments |
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1936 and deallocated/trimmed using MORECORE with negative arguments. |
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1937 */ |
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1938 |
|
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1939 struct malloc_segment |
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1940 { |
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1941 char *base; /* base address */ |
|
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1942 size_t size; /* allocated size */ |
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1943 struct malloc_segment *next; /* ptr to next segment */ |
|
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1944 flag_t sflags; /* mmap and extern flag */ |
|
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1945 }; |
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|
1946 |
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|
1947 #define is_mmapped_segment(S) ((S)->sflags & IS_MMAPPED_BIT) |
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1948 #define is_extern_segment(S) ((S)->sflags & EXTERN_BIT) |
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1949 |
|
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1950 typedef struct malloc_segment msegment; |
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1951 typedef struct malloc_segment *msegmentptr; |
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1952 |
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1953 /* ---------------------------- malloc_state ----------------------------- */ |
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1954 |
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|
1955 /* |
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|
1956 A malloc_state holds all of the bookkeeping for a space. |
|
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|
1957 The main fields are: |
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1958 |
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|
1959 Top |
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|
1960 The topmost chunk of the currently active segment. Its size is |
|
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|
1961 cached in topsize. The actual size of topmost space is |
|
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|
1962 topsize+TOP_FOOT_SIZE, which includes space reserved for adding |
|
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|
1963 fenceposts and segment records if necessary when getting more |
|
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|
1964 space from the system. The size at which to autotrim top is |
|
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|
1965 cached from mparams in trim_check, except that it is disabled if |
|
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|
1966 an autotrim fails. |
|
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|
1967 |
|
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parents:
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|
1968 Designated victim (dv) |
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parents:
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1969 This is the preferred chunk for servicing small requests that |
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parents:
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1970 don't have exact fits. It is normally the chunk split off most |
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
1971 recently to service another small request. Its size is cached in |
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450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
1972 dvsize. The link fields of this chunk are not maintained since it |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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1973 is not kept in a bin. |
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
1974 |
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parents:
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|
1975 SmallBins |
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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1976 An array of bin headers for free chunks. These bins hold chunks |
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
1977 with sizes less than MIN_LARGE_SIZE bytes. Each bin contains |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
1978 chunks of all the same size, spaced 8 bytes apart. To simplify |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
1979 use in double-linked lists, each bin header acts as a malloc_chunk |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
1980 pointing to the real first node, if it exists (else pointing to |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
1981 itself). This avoids special-casing for headers. But to avoid |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
1982 waste, we allocate only the fd/bk pointers of bins, and then use |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
1983 repositioning tricks to treat these as the fields of a chunk. |
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450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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|
1984 |
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It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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|
1985 TreeBins |
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
1986 Treebins are pointers to the roots of trees holding a range of |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
1987 sizes. There are 2 equally spaced treebins for each power of two |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
1988 from TREE_SHIFT to TREE_SHIFT+16. The last bin holds anything |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
1989 larger. |
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450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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changeset
|
1990 |
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It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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changeset
|
1991 Bin maps |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
1992 There is one bit map for small bins ("smallmap") and one for |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
1993 treebins ("treemap). Each bin sets its bit when non-empty, and |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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|
1994 clears the bit when empty. Bit operations are then used to avoid |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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|
1995 bin-by-bin searching -- nearly all "search" is done without ever |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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|
1996 looking at bins that won't be selected. The bit maps |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
1997 conservatively use 32 bits per map word, even if on 64bit system. |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
1998 For a good description of some of the bit-based techniques used |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
1999 here, see Henry S. Warren Jr's book "Hacker's Delight" (and |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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changeset
|
2000 supplement at http://hackersdelight.org/). Many of these are |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
2001 intended to reduce the branchiness of paths through malloc etc, as |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
2002 well as to reduce the number of memory locations read or written. |
|
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It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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changeset
|
2003 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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|
2004 Segments |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
2005 A list of segments headed by an embedded malloc_segment record |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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|
2006 representing the initial space. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
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parents:
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changeset
|
2007 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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changeset
|
2008 Address check support |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2009 The least_addr field is the least address ever obtained from |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2010 MORECORE or MMAP. Attempted frees and reallocs of any address less |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2011 than this are trapped (unless INSECURE is defined). |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2012 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2013 Magic tag |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2014 A cross-check field that should always hold same value as mparams.magic. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2015 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2016 Flags |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2017 Bits recording whether to use MMAP, locks, or contiguous MORECORE |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2018 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2019 Statistics |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2020 Each space keeps track of current and maximum system memory |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2021 obtained via MORECORE or MMAP. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2022 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2023 Locking |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2024 If USE_LOCKS is defined, the "mutex" lock is acquired and released |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2025 around every public call using this mspace. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2026 */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2027 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2028 /* Bin types, widths and sizes */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2029 #define NSMALLBINS (32U) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2030 #define NTREEBINS (32U) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2031 #define SMALLBIN_SHIFT (3U) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2032 #define SMALLBIN_WIDTH (SIZE_T_ONE << SMALLBIN_SHIFT) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2033 #define TREEBIN_SHIFT (8U) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2034 #define MIN_LARGE_SIZE (SIZE_T_ONE << TREEBIN_SHIFT) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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changeset
|
2035 #define MAX_SMALL_SIZE (MIN_LARGE_SIZE - SIZE_T_ONE) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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changeset
|
2036 #define MAX_SMALL_REQUEST (MAX_SMALL_SIZE - CHUNK_ALIGN_MASK - CHUNK_OVERHEAD) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2037 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2038 struct malloc_state |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2039 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2040 binmap_t smallmap; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2041 binmap_t treemap; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2042 size_t dvsize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2043 size_t topsize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2044 char *least_addr; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2045 mchunkptr dv; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2046 mchunkptr top; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2047 size_t trim_check; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2048 size_t magic; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2049 mchunkptr smallbins[(NSMALLBINS + 1) * 2]; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2050 tbinptr treebins[NTREEBINS]; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2051 size_t footprint; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2052 size_t max_footprint; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2053 flag_t mflags; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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|
2054 #if USE_LOCKS |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
2055 MLOCK_T mutex; /* locate lock among fields that rarely change */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2056 #endif /* USE_LOCKS */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2057 msegment seg; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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changeset
|
2058 }; |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2059 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2060 typedef struct malloc_state *mstate; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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changeset
|
2061 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2062 /* ------------- Global malloc_state and malloc_params ------------------- */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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changeset
|
2063 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2064 /* |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2065 malloc_params holds global properties, including those that can be |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2066 dynamically set using mallopt. There is a single instance, mparams, |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2067 initialized in init_mparams. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2068 */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2069 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2070 struct malloc_params |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2071 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2072 size_t magic; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2073 size_t page_size; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2074 size_t granularity; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2075 size_t mmap_threshold; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2076 size_t trim_threshold; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2077 flag_t default_mflags; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2078 }; |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2079 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2080 static struct malloc_params mparams; |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2081 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2082 /* The global malloc_state used for all non-"mspace" calls */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2083 static struct malloc_state _gm_; |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2084 #define gm (&_gm_) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2085 #define is_global(M) ((M) == &_gm_) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2086 #define is_initialized(M) ((M)->top != 0) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2087 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2088 /* -------------------------- system alloc setup ------------------------- */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2089 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2090 /* Operations on mflags */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2091 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2092 #define use_lock(M) ((M)->mflags & USE_LOCK_BIT) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2093 #define enable_lock(M) ((M)->mflags |= USE_LOCK_BIT) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2094 #define disable_lock(M) ((M)->mflags &= ~USE_LOCK_BIT) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2095 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2096 #define use_mmap(M) ((M)->mflags & USE_MMAP_BIT) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2097 #define enable_mmap(M) ((M)->mflags |= USE_MMAP_BIT) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2098 #define disable_mmap(M) ((M)->mflags &= ~USE_MMAP_BIT) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2099 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2100 #define use_noncontiguous(M) ((M)->mflags & USE_NONCONTIGUOUS_BIT) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2101 #define disable_contiguous(M) ((M)->mflags |= USE_NONCONTIGUOUS_BIT) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2102 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2103 #define set_lock(M,L)\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2104 ((M)->mflags = (L)?\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2105 ((M)->mflags | USE_LOCK_BIT) :\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2106 ((M)->mflags & ~USE_LOCK_BIT)) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2107 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2108 /* page-align a size */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2109 #define page_align(S)\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2110 (((S) + (mparams.page_size)) & ~(mparams.page_size - SIZE_T_ONE)) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2111 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2112 /* granularity-align a size */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2113 #define granularity_align(S)\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2114 (((S) + (mparams.granularity)) & ~(mparams.granularity - SIZE_T_ONE)) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2115 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2116 #define is_page_aligned(S)\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2117 (((size_t)(S) & (mparams.page_size - SIZE_T_ONE)) == 0) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2118 #define is_granularity_aligned(S)\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2119 (((size_t)(S) & (mparams.granularity - SIZE_T_ONE)) == 0) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2120 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2121 /* True if segment S holds address A */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2122 #define segment_holds(S, A)\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2123 ((char*)(A) >= S->base && (char*)(A) < S->base + S->size) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2124 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2125 /* Return segment holding given address */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2126 static msegmentptr |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2127 segment_holding(mstate m, char *addr) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2128 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2129 msegmentptr sp = &m->seg; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2130 for (;;) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2131 if (addr >= sp->base && addr < sp->base + sp->size) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2132 return sp; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2133 if ((sp = sp->next) == 0) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2134 return 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2135 } |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2136 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2137 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2138 /* Return true if segment contains a segment link */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2139 static int |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2140 has_segment_link(mstate m, msegmentptr ss) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2141 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2142 msegmentptr sp = &m->seg; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2143 for (;;) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2144 if ((char *) sp >= ss->base && (char *) sp < ss->base + ss->size) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2145 return 1; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2146 if ((sp = sp->next) == 0) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2147 return 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2148 } |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2149 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2150 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2151 #ifndef MORECORE_CANNOT_TRIM |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2152 #define should_trim(M,s) ((s) > (M)->trim_check) |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2153 #else /* MORECORE_CANNOT_TRIM */ |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2154 #define should_trim(M,s) (0) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2155 #endif /* MORECORE_CANNOT_TRIM */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2156 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2157 /* |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2158 TOP_FOOT_SIZE is padding at the end of a segment, including space |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2159 that may be needed to place segment records and fenceposts when new |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2160 noncontiguous segments are added. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2161 */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2162 #define TOP_FOOT_SIZE\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2163 (align_offset(chunk2mem(0))+pad_request(sizeof(struct malloc_segment))+MIN_CHUNK_SIZE) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2164 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2165 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2166 /* ------------------------------- Hooks -------------------------------- */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2167 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2168 /* |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2169 PREACTION should be defined to return 0 on success, and nonzero on |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2170 failure. If you are not using locking, you can redefine these to do |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2171 anything you like. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2172 */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2173 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2174 #if USE_LOCKS |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2175 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2176 /* Ensure locks are initialized */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2177 #define GLOBALLY_INITIALIZE() (mparams.page_size == 0 && init_mparams()) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2178 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2179 #define PREACTION(M) ((GLOBALLY_INITIALIZE() || use_lock(M))? ACQUIRE_LOCK(&(M)->mutex) : 0) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2180 #define POSTACTION(M) { if (use_lock(M)) RELEASE_LOCK(&(M)->mutex); } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2181 #else /* USE_LOCKS */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2182 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2183 #ifndef PREACTION |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2184 #define PREACTION(M) (0) |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2185 #endif /* PREACTION */ |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2186 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2187 #ifndef POSTACTION |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2188 #define POSTACTION(M) |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2189 #endif /* POSTACTION */ |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2190 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2191 #endif /* USE_LOCKS */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2192 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2193 /* |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2194 CORRUPTION_ERROR_ACTION is triggered upon detected bad addresses. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2195 USAGE_ERROR_ACTION is triggered on detected bad frees and |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2196 reallocs. The argument p is an address that might have triggered the |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2197 fault. It is ignored by the two predefined actions, but might be |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2198 useful in custom actions that try to help diagnose errors. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2199 */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2200 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2201 #if PROCEED_ON_ERROR |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2202 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2203 /* A count of the number of corruption errors causing resets */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2204 int malloc_corruption_error_count; |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2205 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2206 /* default corruption action */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2207 static void reset_on_error(mstate m); |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2208 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2209 #define CORRUPTION_ERROR_ACTION(m) reset_on_error(m) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2210 #define USAGE_ERROR_ACTION(m, p) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2211 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2212 #else /* PROCEED_ON_ERROR */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2213 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2214 #ifndef CORRUPTION_ERROR_ACTION |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2215 #define CORRUPTION_ERROR_ACTION(m) ABORT |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2216 #endif /* CORRUPTION_ERROR_ACTION */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2217 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2218 #ifndef USAGE_ERROR_ACTION |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2219 #define USAGE_ERROR_ACTION(m,p) ABORT |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2220 #endif /* USAGE_ERROR_ACTION */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2221 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2222 #endif /* PROCEED_ON_ERROR */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2223 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2224 /* -------------------------- Debugging setup ---------------------------- */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2225 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2226 #if ! DEBUG |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2227 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2228 #define check_free_chunk(M,P) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2229 #define check_inuse_chunk(M,P) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2230 #define check_malloced_chunk(M,P,N) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2231 #define check_mmapped_chunk(M,P) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2232 #define check_malloc_state(M) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2233 #define check_top_chunk(M,P) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2234 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2235 #else /* DEBUG */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2236 #define check_free_chunk(M,P) do_check_free_chunk(M,P) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2237 #define check_inuse_chunk(M,P) do_check_inuse_chunk(M,P) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2238 #define check_top_chunk(M,P) do_check_top_chunk(M,P) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2239 #define check_malloced_chunk(M,P,N) do_check_malloced_chunk(M,P,N) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2240 #define check_mmapped_chunk(M,P) do_check_mmapped_chunk(M,P) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2241 #define check_malloc_state(M) do_check_malloc_state(M) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2242 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2243 static void do_check_any_chunk(mstate m, mchunkptr p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2244 static void do_check_top_chunk(mstate m, mchunkptr p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2245 static void do_check_mmapped_chunk(mstate m, mchunkptr p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2246 static void do_check_inuse_chunk(mstate m, mchunkptr p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2247 static void do_check_free_chunk(mstate m, mchunkptr p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2248 static void do_check_malloced_chunk(mstate m, void *mem, size_t s); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2249 static void do_check_tree(mstate m, tchunkptr t); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2250 static void do_check_treebin(mstate m, bindex_t i); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2251 static void do_check_smallbin(mstate m, bindex_t i); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2252 static void do_check_malloc_state(mstate m); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2253 static int bin_find(mstate m, mchunkptr x); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2254 static size_t traverse_and_check(mstate m); |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2255 #endif /* DEBUG */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2256 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2257 /* ---------------------------- Indexing Bins ---------------------------- */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2258 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2259 #define is_small(s) (((s) >> SMALLBIN_SHIFT) < NSMALLBINS) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2260 #define small_index(s) ((s) >> SMALLBIN_SHIFT) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2261 #define small_index2size(i) ((i) << SMALLBIN_SHIFT) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2262 #define MIN_SMALL_INDEX (small_index(MIN_CHUNK_SIZE)) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2263 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2264 /* addressing by index. See above about smallbin repositioning */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2265 #define smallbin_at(M, i) ((sbinptr)((char*)&((M)->smallbins[(i)<<1]))) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2266 #define treebin_at(M,i) (&((M)->treebins[i])) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2267 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2268 /* assign tree index for size S to variable I */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2269 #if defined(__GNUC__) && defined(i386) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2270 #define compute_tree_index(S, I)\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2271 {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2272 size_t X = S >> TREEBIN_SHIFT;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2273 if (X == 0)\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2274 I = 0;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2275 else if (X > 0xFFFF)\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2276 I = NTREEBINS-1;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2277 else {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2278 unsigned int K;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2279 __asm__("bsrl %1,%0\n\t" : "=r" (K) : "rm" (X));\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2280 I = (bindex_t)((K << 1) + ((S >> (K + (TREEBIN_SHIFT-1)) & 1)));\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2281 }\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2282 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2283 #else /* GNUC */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2284 #define compute_tree_index(S, I)\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2285 {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2286 size_t X = S >> TREEBIN_SHIFT;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2287 if (X == 0)\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2288 I = 0;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2289 else if (X > 0xFFFF)\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2290 I = NTREEBINS-1;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2291 else {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2292 unsigned int Y = (unsigned int)X;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2293 unsigned int N = ((Y - 0x100) >> 16) & 8;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2294 unsigned int K = (((Y <<= N) - 0x1000) >> 16) & 4;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2295 N += K;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2296 N += K = (((Y <<= K) - 0x4000) >> 16) & 2;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2297 K = 14 - N + ((Y <<= K) >> 15);\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2298 I = (K << 1) + ((S >> (K + (TREEBIN_SHIFT-1)) & 1));\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2299 }\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2300 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2301 #endif /* GNUC */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2302 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2303 /* Bit representing maximum resolved size in a treebin at i */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2304 #define bit_for_tree_index(i) \ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2305 (i == NTREEBINS-1)? (SIZE_T_BITSIZE-1) : (((i) >> 1) + TREEBIN_SHIFT - 2) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2306 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2307 /* Shift placing maximum resolved bit in a treebin at i as sign bit */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2308 #define leftshift_for_tree_index(i) \ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2309 ((i == NTREEBINS-1)? 0 : \ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2310 ((SIZE_T_BITSIZE-SIZE_T_ONE) - (((i) >> 1) + TREEBIN_SHIFT - 2))) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2311 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2312 /* The size of the smallest chunk held in bin with index i */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2313 #define minsize_for_tree_index(i) \ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2314 ((SIZE_T_ONE << (((i) >> 1) + TREEBIN_SHIFT)) | \ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2315 (((size_t)((i) & SIZE_T_ONE)) << (((i) >> 1) + TREEBIN_SHIFT - 1))) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2316 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2317 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2318 /* ------------------------ Operations on bin maps ----------------------- */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2319 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2320 /* bit corresponding to given index */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2321 #define idx2bit(i) ((binmap_t)(1) << (i)) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2322 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2323 /* Mark/Clear bits with given index */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2324 #define mark_smallmap(M,i) ((M)->smallmap |= idx2bit(i)) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2325 #define clear_smallmap(M,i) ((M)->smallmap &= ~idx2bit(i)) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2326 #define smallmap_is_marked(M,i) ((M)->smallmap & idx2bit(i)) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2327 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2328 #define mark_treemap(M,i) ((M)->treemap |= idx2bit(i)) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2329 #define clear_treemap(M,i) ((M)->treemap &= ~idx2bit(i)) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2330 #define treemap_is_marked(M,i) ((M)->treemap & idx2bit(i)) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2331 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2332 /* index corresponding to given bit */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2333 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2334 #if defined(__GNUC__) && defined(i386) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2335 #define compute_bit2idx(X, I)\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2336 {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2337 unsigned int J;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2338 __asm__("bsfl %1,%0\n\t" : "=r" (J) : "rm" (X));\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2339 I = (bindex_t)J;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2340 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2341 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2342 #else /* GNUC */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2343 #if USE_BUILTIN_FFS |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2344 #define compute_bit2idx(X, I) I = ffs(X)-1 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2345 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2346 #else /* USE_BUILTIN_FFS */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2347 #define compute_bit2idx(X, I)\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2348 {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2349 unsigned int Y = X - 1;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2350 unsigned int K = Y >> (16-4) & 16;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2351 unsigned int N = K; Y >>= K;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2352 N += K = Y >> (8-3) & 8; Y >>= K;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2353 N += K = Y >> (4-2) & 4; Y >>= K;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2354 N += K = Y >> (2-1) & 2; Y >>= K;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2355 N += K = Y >> (1-0) & 1; Y >>= K;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2356 I = (bindex_t)(N + Y);\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2357 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2358 #endif /* USE_BUILTIN_FFS */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2359 #endif /* GNUC */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2360 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2361 /* isolate the least set bit of a bitmap */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2362 #define least_bit(x) ((x) & -(x)) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2363 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2364 /* mask with all bits to left of least bit of x on */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2365 #define left_bits(x) ((x<<1) | -(x<<1)) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2366 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2367 /* mask with all bits to left of or equal to least bit of x on */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2368 #define same_or_left_bits(x) ((x) | -(x)) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2369 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2370 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2371 /* ----------------------- Runtime Check Support ------------------------- */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2372 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2373 /* |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2374 For security, the main invariant is that malloc/free/etc never |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2375 writes to a static address other than malloc_state, unless static |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2376 malloc_state itself has been corrupted, which cannot occur via |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2377 malloc (because of these checks). In essence this means that we |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2378 believe all pointers, sizes, maps etc held in malloc_state, but |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2379 check all of those linked or offsetted from other embedded data |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2380 structures. These checks are interspersed with main code in a way |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2381 that tends to minimize their run-time cost. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2382 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2383 When FOOTERS is defined, in addition to range checking, we also |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2384 verify footer fields of inuse chunks, which can be used guarantee |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2385 that the mstate controlling malloc/free is intact. This is a |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2386 streamlined version of the approach described by William Robertson |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2387 et al in "Run-time Detection of Heap-based Overflows" LISA'03 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2388 http://www.usenix.org/events/lisa03/tech/robertson.html The footer |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2389 of an inuse chunk holds the xor of its mstate and a random seed, |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2390 that is checked upon calls to free() and realloc(). This is |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2391 (probablistically) unguessable from outside the program, but can be |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2392 computed by any code successfully malloc'ing any chunk, so does not |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2393 itself provide protection against code that has already broken |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2394 security through some other means. Unlike Robertson et al, we |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2395 always dynamically check addresses of all offset chunks (previous, |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2396 next, etc). This turns out to be cheaper than relying on hashes. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2397 */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2398 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2399 #if !INSECURE |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2400 /* Check if address a is at least as high as any from MORECORE or MMAP */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2401 #define ok_address(M, a) ((char*)(a) >= (M)->least_addr) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2402 /* Check if address of next chunk n is higher than base chunk p */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2403 #define ok_next(p, n) ((char*)(p) < (char*)(n)) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2404 /* Check if p has its cinuse bit on */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2405 #define ok_cinuse(p) cinuse(p) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2406 /* Check if p has its pinuse bit on */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2407 #define ok_pinuse(p) pinuse(p) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2408 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2409 #else /* !INSECURE */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2410 #define ok_address(M, a) (1) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2411 #define ok_next(b, n) (1) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2412 #define ok_cinuse(p) (1) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2413 #define ok_pinuse(p) (1) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2414 #endif /* !INSECURE */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2415 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2416 #if (FOOTERS && !INSECURE) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2417 /* Check if (alleged) mstate m has expected magic field */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2418 #define ok_magic(M) ((M)->magic == mparams.magic) |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2419 #else /* (FOOTERS && !INSECURE) */ |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2420 #define ok_magic(M) (1) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2421 #endif /* (FOOTERS && !INSECURE) */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2422 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2423 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2424 /* In gcc, use __builtin_expect to minimize impact of checks */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2425 #if !INSECURE |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2426 #if defined(__GNUC__) && __GNUC__ >= 3 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2427 #define RTCHECK(e) __builtin_expect(e, 1) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2428 #else /* GNUC */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2429 #define RTCHECK(e) (e) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2430 #endif /* GNUC */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2431 #else /* !INSECURE */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2432 #define RTCHECK(e) (1) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2433 #endif /* !INSECURE */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2434 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2435 /* macros to set up inuse chunks with or without footers */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2436 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2437 #if !FOOTERS |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2438 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2439 #define mark_inuse_foot(M,p,s) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2440 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2441 /* Set cinuse bit and pinuse bit of next chunk */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2442 #define set_inuse(M,p,s)\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2443 ((p)->head = (((p)->head & PINUSE_BIT)|s|CINUSE_BIT),\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2444 ((mchunkptr)(((char*)(p)) + (s)))->head |= PINUSE_BIT) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2445 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2446 /* Set cinuse and pinuse of this chunk and pinuse of next chunk */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2447 #define set_inuse_and_pinuse(M,p,s)\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2448 ((p)->head = (s|PINUSE_BIT|CINUSE_BIT),\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2449 ((mchunkptr)(((char*)(p)) + (s)))->head |= PINUSE_BIT) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2450 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2451 /* Set size, cinuse and pinuse bit of this chunk */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2452 #define set_size_and_pinuse_of_inuse_chunk(M, p, s)\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2453 ((p)->head = (s|PINUSE_BIT|CINUSE_BIT)) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2454 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2455 #else /* FOOTERS */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2456 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2457 /* Set foot of inuse chunk to be xor of mstate and seed */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2458 #define mark_inuse_foot(M,p,s)\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2459 (((mchunkptr)((char*)(p) + (s)))->prev_foot = ((size_t)(M) ^ mparams.magic)) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2460 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2461 #define get_mstate_for(p)\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2462 ((mstate)(((mchunkptr)((char*)(p) +\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2463 (chunksize(p))))->prev_foot ^ mparams.magic)) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2464 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2465 #define set_inuse(M,p,s)\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2466 ((p)->head = (((p)->head & PINUSE_BIT)|s|CINUSE_BIT),\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2467 (((mchunkptr)(((char*)(p)) + (s)))->head |= PINUSE_BIT), \ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2468 mark_inuse_foot(M,p,s)) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2469 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2470 #define set_inuse_and_pinuse(M,p,s)\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2471 ((p)->head = (s|PINUSE_BIT|CINUSE_BIT),\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2472 (((mchunkptr)(((char*)(p)) + (s)))->head |= PINUSE_BIT),\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2473 mark_inuse_foot(M,p,s)) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2474 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2475 #define set_size_and_pinuse_of_inuse_chunk(M, p, s)\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2476 ((p)->head = (s|PINUSE_BIT|CINUSE_BIT),\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2477 mark_inuse_foot(M, p, s)) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2478 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2479 #endif /* !FOOTERS */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2480 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2481 /* ---------------------------- setting mparams -------------------------- */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2482 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2483 /* Initialize mparams */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2484 static int |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2485 init_mparams(void) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2486 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2487 if (mparams.page_size == 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2488 size_t s; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2489 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2490 mparams.mmap_threshold = DEFAULT_MMAP_THRESHOLD; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2491 mparams.trim_threshold = DEFAULT_TRIM_THRESHOLD; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2492 #if MORECORE_CONTIGUOUS |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2493 mparams.default_mflags = USE_LOCK_BIT | USE_MMAP_BIT; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2494 #else /* MORECORE_CONTIGUOUS */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2495 mparams.default_mflags = |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2496 USE_LOCK_BIT | USE_MMAP_BIT | USE_NONCONTIGUOUS_BIT; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2497 #endif /* MORECORE_CONTIGUOUS */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2498 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2499 #if (FOOTERS && !INSECURE) |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2500 { |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2501 #if USE_DEV_RANDOM |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2502 int fd; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2503 unsigned char buf[sizeof(size_t)]; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2504 /* Try to use /dev/urandom, else fall back on using time */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2505 if ((fd = open("/dev/urandom", O_RDONLY)) >= 0 && |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2506 read(fd, buf, sizeof(buf)) == sizeof(buf)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2507 s = *((size_t *) buf); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2508 close(fd); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2509 } else |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2510 #endif /* USE_DEV_RANDOM */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2511 s = (size_t) (time(0) ^ (size_t) 0x55555555U); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2512 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2513 s |= (size_t) 8U; /* ensure nonzero */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2514 s &= ~(size_t) 7U; /* improve chances of fault for bad values */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2515 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2516 } |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2517 #else /* (FOOTERS && !INSECURE) */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2518 s = (size_t) 0x58585858U; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2519 #endif /* (FOOTERS && !INSECURE) */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2520 ACQUIRE_MAGIC_INIT_LOCK(); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2521 if (mparams.magic == 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2522 mparams.magic = s; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2523 /* Set up lock for main malloc area */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2524 INITIAL_LOCK(&gm->mutex); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2525 gm->mflags = mparams.default_mflags; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2526 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2527 RELEASE_MAGIC_INIT_LOCK(); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2528 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2529 #ifndef WIN32 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2530 mparams.page_size = malloc_getpagesize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2531 mparams.granularity = ((DEFAULT_GRANULARITY != 0) ? |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2532 DEFAULT_GRANULARITY : mparams.page_size); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2533 #else /* WIN32 */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2534 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2535 SYSTEM_INFO system_info; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2536 GetSystemInfo(&system_info); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2537 mparams.page_size = system_info.dwPageSize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2538 mparams.granularity = system_info.dwAllocationGranularity; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2539 } |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2540 #endif /* WIN32 */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2541 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2542 /* Sanity-check configuration: |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2543 size_t must be unsigned and as wide as pointer type. |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2544 ints must be at least 4 bytes. |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2545 alignment must be at least 8. |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2546 Alignment, min chunk size, and page size must all be powers of 2. |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2547 */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2548 if ((sizeof(size_t) != sizeof(char *)) || |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2549 (MAX_SIZE_T < MIN_CHUNK_SIZE) || |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2550 (sizeof(int) < 4) || |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2551 (MALLOC_ALIGNMENT < (size_t) 8U) || |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2552 ((MALLOC_ALIGNMENT & (MALLOC_ALIGNMENT - SIZE_T_ONE)) != 0) || |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2553 ((MCHUNK_SIZE & (MCHUNK_SIZE - SIZE_T_ONE)) != 0) || |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2554 ((mparams.granularity & (mparams.granularity - SIZE_T_ONE)) != 0) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2555 || ((mparams.page_size & (mparams.page_size - SIZE_T_ONE)) != 0)) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2556 ABORT; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2557 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2558 return 0; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2559 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2560 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2561 /* support for mallopt */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2562 static int |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2563 change_mparam(int param_number, int value) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2564 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2565 size_t val = (size_t) value; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2566 init_mparams(); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2567 switch (param_number) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2568 case M_TRIM_THRESHOLD: |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2569 mparams.trim_threshold = val; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2570 return 1; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2571 case M_GRANULARITY: |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2572 if (val >= mparams.page_size && ((val & (val - 1)) == 0)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2573 mparams.granularity = val; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2574 return 1; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2575 } else |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2576 return 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2577 case M_MMAP_THRESHOLD: |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2578 mparams.mmap_threshold = val; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2579 return 1; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2580 default: |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2581 return 0; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2582 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2583 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2584 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2585 #if DEBUG |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2586 /* ------------------------- Debugging Support --------------------------- */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2587 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2588 /* Check properties of any chunk, whether free, inuse, mmapped etc */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2589 static void |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2590 do_check_any_chunk(mstate m, mchunkptr p) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2591 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2592 assert((is_aligned(chunk2mem(p))) || (p->head == FENCEPOST_HEAD)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2593 assert(ok_address(m, p)); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2594 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2595 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2596 /* Check properties of top chunk */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2597 static void |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2598 do_check_top_chunk(mstate m, mchunkptr p) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2599 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2600 msegmentptr sp = segment_holding(m, (char *) p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2601 size_t sz = chunksize(p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2602 assert(sp != 0); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2603 assert((is_aligned(chunk2mem(p))) || (p->head == FENCEPOST_HEAD)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2604 assert(ok_address(m, p)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2605 assert(sz == m->topsize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2606 assert(sz > 0); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2607 assert(sz == ((sp->base + sp->size) - (char *) p) - TOP_FOOT_SIZE); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2608 assert(pinuse(p)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2609 assert(!next_pinuse(p)); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2610 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2611 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2612 /* Check properties of (inuse) mmapped chunks */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2613 static void |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2614 do_check_mmapped_chunk(mstate m, mchunkptr p) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2615 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2616 size_t sz = chunksize(p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2617 size_t len = (sz + (p->prev_foot & ~IS_MMAPPED_BIT) + MMAP_FOOT_PAD); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2618 assert(is_mmapped(p)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2619 assert(use_mmap(m)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2620 assert((is_aligned(chunk2mem(p))) || (p->head == FENCEPOST_HEAD)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2621 assert(ok_address(m, p)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2622 assert(!is_small(sz)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2623 assert((len & (mparams.page_size - SIZE_T_ONE)) == 0); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2624 assert(chunk_plus_offset(p, sz)->head == FENCEPOST_HEAD); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2625 assert(chunk_plus_offset(p, sz + SIZE_T_SIZE)->head == 0); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2626 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2627 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2628 /* Check properties of inuse chunks */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2629 static void |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2630 do_check_inuse_chunk(mstate m, mchunkptr p) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2631 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2632 do_check_any_chunk(m, p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2633 assert(cinuse(p)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2634 assert(next_pinuse(p)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2635 /* If not pinuse and not mmapped, previous chunk has OK offset */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2636 assert(is_mmapped(p) || pinuse(p) || next_chunk(prev_chunk(p)) == p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2637 if (is_mmapped(p)) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2638 do_check_mmapped_chunk(m, p); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2639 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2640 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2641 /* Check properties of free chunks */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2642 static void |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2643 do_check_free_chunk(mstate m, mchunkptr p) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2644 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2645 size_t sz = p->head & ~(PINUSE_BIT | CINUSE_BIT); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2646 mchunkptr next = chunk_plus_offset(p, sz); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2647 do_check_any_chunk(m, p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2648 assert(!cinuse(p)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2649 assert(!next_pinuse(p)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2650 assert(!is_mmapped(p)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2651 if (p != m->dv && p != m->top) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2652 if (sz >= MIN_CHUNK_SIZE) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2653 assert((sz & CHUNK_ALIGN_MASK) == 0); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2654 assert(is_aligned(chunk2mem(p))); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2655 assert(next->prev_foot == sz); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2656 assert(pinuse(p)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2657 assert(next == m->top || cinuse(next)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2658 assert(p->fd->bk == p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2659 assert(p->bk->fd == p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2660 } else /* markers are always of size SIZE_T_SIZE */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2661 assert(sz == SIZE_T_SIZE); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2662 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2663 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2664 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2665 /* Check properties of malloced chunks at the point they are malloced */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2666 static void |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2667 do_check_malloced_chunk(mstate m, void *mem, size_t s) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2668 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2669 if (mem != 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2670 mchunkptr p = mem2chunk(mem); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2671 size_t sz = p->head & ~(PINUSE_BIT | CINUSE_BIT); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2672 do_check_inuse_chunk(m, p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2673 assert((sz & CHUNK_ALIGN_MASK) == 0); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2674 assert(sz >= MIN_CHUNK_SIZE); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2675 assert(sz >= s); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2676 /* unless mmapped, size is less than MIN_CHUNK_SIZE more than request */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2677 assert(is_mmapped(p) || sz < (s + MIN_CHUNK_SIZE)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2678 } |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2679 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2680 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2681 /* Check a tree and its subtrees. */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2682 static void |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2683 do_check_tree(mstate m, tchunkptr t) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2684 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2685 tchunkptr head = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2686 tchunkptr u = t; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2687 bindex_t tindex = t->index; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2688 size_t tsize = chunksize(t); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2689 bindex_t idx; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2690 compute_tree_index(tsize, idx); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2691 assert(tindex == idx); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2692 assert(tsize >= MIN_LARGE_SIZE); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2693 assert(tsize >= minsize_for_tree_index(idx)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2694 assert((idx == NTREEBINS - 1) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2695 || (tsize < minsize_for_tree_index((idx + 1)))); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2696 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2697 do { /* traverse through chain of same-sized nodes */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2698 do_check_any_chunk(m, ((mchunkptr) u)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2699 assert(u->index == tindex); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2700 assert(chunksize(u) == tsize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2701 assert(!cinuse(u)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2702 assert(!next_pinuse(u)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2703 assert(u->fd->bk == u); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2704 assert(u->bk->fd == u); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2705 if (u->parent == 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2706 assert(u->child[0] == 0); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2707 assert(u->child[1] == 0); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2708 } else { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2709 assert(head == 0); /* only one node on chain has parent */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2710 head = u; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2711 assert(u->parent != u); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2712 assert(u->parent->child[0] == u || |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2713 u->parent->child[1] == u || |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2714 *((tbinptr *) (u->parent)) == u); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2715 if (u->child[0] != 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2716 assert(u->child[0]->parent == u); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2717 assert(u->child[0] != u); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2718 do_check_tree(m, u->child[0]); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2719 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2720 if (u->child[1] != 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2721 assert(u->child[1]->parent == u); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2722 assert(u->child[1] != u); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2723 do_check_tree(m, u->child[1]); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2724 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2725 if (u->child[0] != 0 && u->child[1] != 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2726 assert(chunksize(u->child[0]) < chunksize(u->child[1])); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2727 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2728 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2729 u = u->fd; |
| 2203 | 2730 } while (u != t); |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2731 assert(head != 0); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2732 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2733 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2734 /* Check all the chunks in a treebin. */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2735 static void |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2736 do_check_treebin(mstate m, bindex_t i) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2737 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2738 tbinptr *tb = treebin_at(m, i); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2739 tchunkptr t = *tb; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2740 int empty = (m->treemap & (1U << i)) == 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2741 if (t == 0) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2742 assert(empty); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2743 if (!empty) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2744 do_check_tree(m, t); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2745 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2746 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2747 /* Check all the chunks in a smallbin. */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2748 static void |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2749 do_check_smallbin(mstate m, bindex_t i) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2750 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2751 sbinptr b = smallbin_at(m, i); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2752 mchunkptr p = b->bk; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2753 unsigned int empty = (m->smallmap & (1U << i)) == 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2754 if (p == b) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2755 assert(empty); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2756 if (!empty) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2757 for (; p != b; p = p->bk) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2758 size_t size = chunksize(p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2759 mchunkptr q; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2760 /* each chunk claims to be free */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2761 do_check_free_chunk(m, p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2762 /* chunk belongs in bin */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2763 assert(small_index(size) == i); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2764 assert(p->bk == b || chunksize(p->bk) == chunksize(p)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2765 /* chunk is followed by an inuse chunk */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2766 q = next_chunk(p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2767 if (q->head != FENCEPOST_HEAD) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2768 do_check_inuse_chunk(m, q); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2769 } |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2770 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2771 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2772 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2773 /* Find x in a bin. Used in other check functions. */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2774 static int |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2775 bin_find(mstate m, mchunkptr x) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2776 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2777 size_t size = chunksize(x); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2778 if (is_small(size)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2779 bindex_t sidx = small_index(size); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2780 sbinptr b = smallbin_at(m, sidx); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2781 if (smallmap_is_marked(m, sidx)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2782 mchunkptr p = b; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2783 do { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2784 if (p == x) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2785 return 1; |
| 2203 | 2786 } while ((p = p->fd) != b); |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2787 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2788 } else { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2789 bindex_t tidx; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2790 compute_tree_index(size, tidx); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2791 if (treemap_is_marked(m, tidx)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2792 tchunkptr t = *treebin_at(m, tidx); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2793 size_t sizebits = size << leftshift_for_tree_index(tidx); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2794 while (t != 0 && chunksize(t) != size) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2795 t = t->child[(sizebits >> (SIZE_T_BITSIZE - SIZE_T_ONE)) & 1]; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2796 sizebits <<= 1; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2797 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2798 if (t != 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2799 tchunkptr u = t; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2800 do { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2801 if (u == (tchunkptr) x) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2802 return 1; |
| 2203 | 2803 } while ((u = u->fd) != t); |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2804 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2805 } |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2806 } |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2807 return 0; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2808 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2809 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2810 /* Traverse each chunk and check it; return total */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2811 static size_t |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2812 traverse_and_check(mstate m) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2813 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2814 size_t sum = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2815 if (is_initialized(m)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2816 msegmentptr s = &m->seg; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2817 sum += m->topsize + TOP_FOOT_SIZE; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2818 while (s != 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2819 mchunkptr q = align_as_chunk(s->base); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2820 mchunkptr lastq = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2821 assert(pinuse(q)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2822 while (segment_holds(s, q) && |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2823 q != m->top && q->head != FENCEPOST_HEAD) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2824 sum += chunksize(q); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2825 if (cinuse(q)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2826 assert(!bin_find(m, q)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2827 do_check_inuse_chunk(m, q); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2828 } else { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2829 assert(q == m->dv || bin_find(m, q)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2830 assert(lastq == 0 || cinuse(lastq)); /* Not 2 consecutive free */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2831 do_check_free_chunk(m, q); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2832 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2833 lastq = q; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2834 q = next_chunk(q); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2835 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2836 s = s->next; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2837 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2838 } |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2839 return sum; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2840 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2841 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2842 /* Check all properties of malloc_state. */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2843 static void |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2844 do_check_malloc_state(mstate m) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2845 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2846 bindex_t i; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2847 size_t total; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2848 /* check bins */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2849 for (i = 0; i < NSMALLBINS; ++i) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2850 do_check_smallbin(m, i); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2851 for (i = 0; i < NTREEBINS; ++i) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2852 do_check_treebin(m, i); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2853 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2854 if (m->dvsize != 0) { /* check dv chunk */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2855 do_check_any_chunk(m, m->dv); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2856 assert(m->dvsize == chunksize(m->dv)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2857 assert(m->dvsize >= MIN_CHUNK_SIZE); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2858 assert(bin_find(m, m->dv) == 0); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2859 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2860 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2861 if (m->top != 0) { /* check top chunk */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2862 do_check_top_chunk(m, m->top); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2863 assert(m->topsize == chunksize(m->top)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2864 assert(m->topsize > 0); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2865 assert(bin_find(m, m->top) == 0); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2866 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2867 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2868 total = traverse_and_check(m); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2869 assert(total <= m->footprint); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2870 assert(m->footprint <= m->max_footprint); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2871 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2872 #endif /* DEBUG */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2873 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2874 /* ----------------------------- statistics ------------------------------ */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2875 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2876 #if !NO_MALLINFO |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2877 static struct mallinfo |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2878 internal_mallinfo(mstate m) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2879 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2880 struct mallinfo nm = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2881 if (!PREACTION(m)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2882 check_malloc_state(m); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2883 if (is_initialized(m)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2884 size_t nfree = SIZE_T_ONE; /* top always free */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2885 size_t mfree = m->topsize + TOP_FOOT_SIZE; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2886 size_t sum = mfree; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2887 msegmentptr s = &m->seg; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2888 while (s != 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2889 mchunkptr q = align_as_chunk(s->base); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2890 while (segment_holds(s, q) && |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2891 q != m->top && q->head != FENCEPOST_HEAD) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2892 size_t sz = chunksize(q); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2893 sum += sz; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2894 if (!cinuse(q)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2895 mfree += sz; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2896 ++nfree; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2897 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2898 q = next_chunk(q); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2899 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2900 s = s->next; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2901 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2902 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2903 nm.arena = sum; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2904 nm.ordblks = nfree; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2905 nm.hblkhd = m->footprint - sum; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2906 nm.usmblks = m->max_footprint; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2907 nm.uordblks = m->footprint - mfree; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2908 nm.fordblks = mfree; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2909 nm.keepcost = m->topsize; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2910 } |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2911 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2912 POSTACTION(m); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2913 } |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2914 return nm; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2915 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2916 #endif /* !NO_MALLINFO */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2917 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2918 static void |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2919 internal_malloc_stats(mstate m) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2920 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2921 if (!PREACTION(m)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2922 size_t maxfp = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2923 size_t fp = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2924 size_t used = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2925 check_malloc_state(m); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2926 if (is_initialized(m)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2927 msegmentptr s = &m->seg; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2928 maxfp = m->max_footprint; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2929 fp = m->footprint; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2930 used = fp - (m->topsize + TOP_FOOT_SIZE); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2931 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2932 while (s != 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2933 mchunkptr q = align_as_chunk(s->base); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2934 while (segment_holds(s, q) && |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2935 q != m->top && q->head != FENCEPOST_HEAD) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2936 if (!cinuse(q)) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2937 used -= chunksize(q); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2938 q = next_chunk(q); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2939 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2940 s = s->next; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2941 } |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2942 } |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2943 #ifndef LACKS_STDIO_H |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2944 fprintf(stderr, "max system bytes = %10lu\n", |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2945 (unsigned long) (maxfp)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2946 fprintf(stderr, "system bytes = %10lu\n", (unsigned long) (fp)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2947 fprintf(stderr, "in use bytes = %10lu\n", (unsigned long) (used)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2948 #endif |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2949 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
2950 POSTACTION(m); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2951 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2952 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2953 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2954 /* ----------------------- Operations on smallbins ----------------------- */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2955 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2956 /* |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2957 Various forms of linking and unlinking are defined as macros. Even |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2958 the ones for trees, which are very long but have very short typical |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2959 paths. This is ugly but reduces reliance on inlining support of |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2960 compilers. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2961 */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2962 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2963 /* Link a free chunk into a smallbin */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2964 #define insert_small_chunk(M, P, S) {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2965 bindex_t I = small_index(S);\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2966 mchunkptr B = smallbin_at(M, I);\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2967 mchunkptr F = B;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2968 assert(S >= MIN_CHUNK_SIZE);\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2969 if (!smallmap_is_marked(M, I))\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2970 mark_smallmap(M, I);\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2971 else if (RTCHECK(ok_address(M, B->fd)))\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2972 F = B->fd;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2973 else {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2974 CORRUPTION_ERROR_ACTION(M);\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2975 }\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2976 B->fd = P;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2977 F->bk = P;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2978 P->fd = F;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2979 P->bk = B;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2980 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2981 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2982 /* Unlink a chunk from a smallbin */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2983 #define unlink_small_chunk(M, P, S) {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2984 mchunkptr F = P->fd;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2985 mchunkptr B = P->bk;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2986 bindex_t I = small_index(S);\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2987 assert(P != B);\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2988 assert(P != F);\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2989 assert(chunksize(P) == small_index2size(I));\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2990 if (F == B)\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2991 clear_smallmap(M, I);\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2992 else if (RTCHECK((F == smallbin_at(M,I) || ok_address(M, F)) &&\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2993 (B == smallbin_at(M,I) || ok_address(M, B)))) {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2994 F->bk = B;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2995 B->fd = F;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2996 }\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2997 else {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2998 CORRUPTION_ERROR_ACTION(M);\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
2999 }\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3000 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3001 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3002 /* Unlink the first chunk from a smallbin */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3003 #define unlink_first_small_chunk(M, B, P, I) {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3004 mchunkptr F = P->fd;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3005 assert(P != B);\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3006 assert(P != F);\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3007 assert(chunksize(P) == small_index2size(I));\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3008 if (B == F)\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3009 clear_smallmap(M, I);\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3010 else if (RTCHECK(ok_address(M, F))) {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3011 B->fd = F;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3012 F->bk = B;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3013 }\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3014 else {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3015 CORRUPTION_ERROR_ACTION(M);\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3016 }\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3017 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3018 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3019 /* Replace dv node, binning the old one */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3020 /* Used only when dvsize known to be small */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3021 #define replace_dv(M, P, S) {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3022 size_t DVS = M->dvsize;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3023 if (DVS != 0) {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3024 mchunkptr DV = M->dv;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3025 assert(is_small(DVS));\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3026 insert_small_chunk(M, DV, DVS);\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3027 }\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3028 M->dvsize = S;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3029 M->dv = P;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3030 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3031 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3032 /* ------------------------- Operations on trees ------------------------- */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3033 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3034 /* Insert chunk into tree */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3035 #define insert_large_chunk(M, X, S) {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3036 tbinptr* H;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3037 bindex_t I;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3038 compute_tree_index(S, I);\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3039 H = treebin_at(M, I);\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3040 X->index = I;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3041 X->child[0] = X->child[1] = 0;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3042 if (!treemap_is_marked(M, I)) {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3043 mark_treemap(M, I);\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3044 *H = X;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3045 X->parent = (tchunkptr)H;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3046 X->fd = X->bk = X;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3047 }\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3048 else {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3049 tchunkptr T = *H;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3050 size_t K = S << leftshift_for_tree_index(I);\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3051 for (;;) {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3052 if (chunksize(T) != S) {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3053 tchunkptr* C = &(T->child[(K >> (SIZE_T_BITSIZE-SIZE_T_ONE)) & 1]);\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3054 K <<= 1;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3055 if (*C != 0)\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3056 T = *C;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3057 else if (RTCHECK(ok_address(M, C))) {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3058 *C = X;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3059 X->parent = T;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3060 X->fd = X->bk = X;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3061 break;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3062 }\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3063 else {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3064 CORRUPTION_ERROR_ACTION(M);\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3065 break;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3066 }\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3067 }\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3068 else {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3069 tchunkptr F = T->fd;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3070 if (RTCHECK(ok_address(M, T) && ok_address(M, F))) {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3071 T->fd = F->bk = X;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3072 X->fd = F;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3073 X->bk = T;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3074 X->parent = 0;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3075 break;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3076 }\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3077 else {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3078 CORRUPTION_ERROR_ACTION(M);\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3079 break;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3080 }\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3081 }\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3082 }\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3083 }\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3084 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3085 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3086 /* |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3087 Unlink steps: |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3088 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3089 1. If x is a chained node, unlink it from its same-sized fd/bk links |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3090 and choose its bk node as its replacement. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3091 2. If x was the last node of its size, but not a leaf node, it must |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3092 be replaced with a leaf node (not merely one with an open left or |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3093 right), to make sure that lefts and rights of descendents |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3094 correspond properly to bit masks. We use the rightmost descendent |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3095 of x. We could use any other leaf, but this is easy to locate and |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3096 tends to counteract removal of leftmosts elsewhere, and so keeps |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3097 paths shorter than minimally guaranteed. This doesn't loop much |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3098 because on average a node in a tree is near the bottom. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3099 3. If x is the base of a chain (i.e., has parent links) relink |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3100 x's parent and children to x's replacement (or null if none). |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3101 */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3102 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3103 #define unlink_large_chunk(M, X) {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3104 tchunkptr XP = X->parent;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3105 tchunkptr R;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3106 if (X->bk != X) {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3107 tchunkptr F = X->fd;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3108 R = X->bk;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3109 if (RTCHECK(ok_address(M, F))) {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3110 F->bk = R;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3111 R->fd = F;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3112 }\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3113 else {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3114 CORRUPTION_ERROR_ACTION(M);\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3115 }\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3116 }\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3117 else {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3118 tchunkptr* RP;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3119 if (((R = *(RP = &(X->child[1]))) != 0) ||\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3120 ((R = *(RP = &(X->child[0]))) != 0)) {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3121 tchunkptr* CP;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3122 while ((*(CP = &(R->child[1])) != 0) ||\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3123 (*(CP = &(R->child[0])) != 0)) {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3124 R = *(RP = CP);\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3125 }\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3126 if (RTCHECK(ok_address(M, RP)))\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3127 *RP = 0;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3128 else {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3129 CORRUPTION_ERROR_ACTION(M);\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3130 }\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3131 }\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3132 }\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3133 if (XP != 0) {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3134 tbinptr* H = treebin_at(M, X->index);\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3135 if (X == *H) {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3136 if ((*H = R) == 0) \ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3137 clear_treemap(M, X->index);\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3138 }\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3139 else if (RTCHECK(ok_address(M, XP))) {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3140 if (XP->child[0] == X) \ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3141 XP->child[0] = R;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3142 else \ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3143 XP->child[1] = R;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3144 }\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3145 else\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3146 CORRUPTION_ERROR_ACTION(M);\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3147 if (R != 0) {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3148 if (RTCHECK(ok_address(M, R))) {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3149 tchunkptr C0, C1;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3150 R->parent = XP;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3151 if ((C0 = X->child[0]) != 0) {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3152 if (RTCHECK(ok_address(M, C0))) {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3153 R->child[0] = C0;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3154 C0->parent = R;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3155 }\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3156 else\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3157 CORRUPTION_ERROR_ACTION(M);\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3158 }\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3159 if ((C1 = X->child[1]) != 0) {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3160 if (RTCHECK(ok_address(M, C1))) {\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3161 R->child[1] = C1;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3162 C1->parent = R;\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3163 }\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3164 else\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3165 CORRUPTION_ERROR_ACTION(M);\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3166 }\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3167 }\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3168 else\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3169 CORRUPTION_ERROR_ACTION(M);\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3170 }\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3171 }\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3172 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3173 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3174 /* Relays to large vs small bin operations */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3175 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3176 #define insert_chunk(M, P, S)\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3177 if (is_small(S)) insert_small_chunk(M, P, S)\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3178 else { tchunkptr TP = (tchunkptr)(P); insert_large_chunk(M, TP, S); } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3179 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3180 #define unlink_chunk(M, P, S)\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3181 if (is_small(S)) unlink_small_chunk(M, P, S)\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3182 else { tchunkptr TP = (tchunkptr)(P); unlink_large_chunk(M, TP); } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3183 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3184 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3185 /* Relays to internal calls to malloc/free from realloc, memalign etc */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3186 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3187 #if ONLY_MSPACES |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3188 #define internal_malloc(m, b) mspace_malloc(m, b) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3189 #define internal_free(m, mem) mspace_free(m,mem); |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3190 #else /* ONLY_MSPACES */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3191 #if MSPACES |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3192 #define internal_malloc(m, b)\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3193 (m == gm)? dlmalloc(b) : mspace_malloc(m, b) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3194 #define internal_free(m, mem)\ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3195 if (m == gm) dlfree(mem); else mspace_free(m,mem); |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3196 #else /* MSPACES */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3197 #define internal_malloc(m, b) dlmalloc(b) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3198 #define internal_free(m, mem) dlfree(mem) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3199 #endif /* MSPACES */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3200 #endif /* ONLY_MSPACES */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3201 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3202 /* ----------------------- Direct-mmapping chunks ----------------------- */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3203 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3204 /* |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3205 Directly mmapped chunks are set up with an offset to the start of |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3206 the mmapped region stored in the prev_foot field of the chunk. This |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3207 allows reconstruction of the required argument to MUNMAP when freed, |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3208 and also allows adjustment of the returned chunk to meet alignment |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3209 requirements (especially in memalign). There is also enough space |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3210 allocated to hold a fake next chunk of size SIZE_T_SIZE to maintain |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3211 the PINUSE bit so frees can be checked. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3212 */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3213 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3214 /* Malloc using mmap */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3215 static void * |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3216 mmap_alloc(mstate m, size_t nb) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3217 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3218 size_t mmsize = |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3219 granularity_align(nb + SIX_SIZE_T_SIZES + CHUNK_ALIGN_MASK); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3220 if (mmsize > nb) { /* Check for wrap around 0 */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3221 char *mm = (char *) (DIRECT_MMAP(mmsize)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3222 if (mm != CMFAIL) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3223 size_t offset = align_offset(chunk2mem(mm)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3224 size_t psize = mmsize - offset - MMAP_FOOT_PAD; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3225 mchunkptr p = (mchunkptr) (mm + offset); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3226 p->prev_foot = offset | IS_MMAPPED_BIT; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3227 (p)->head = (psize | CINUSE_BIT); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3228 mark_inuse_foot(m, p, psize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3229 chunk_plus_offset(p, psize)->head = FENCEPOST_HEAD; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3230 chunk_plus_offset(p, psize + SIZE_T_SIZE)->head = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3231 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3232 if (mm < m->least_addr) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3233 m->least_addr = mm; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3234 if ((m->footprint += mmsize) > m->max_footprint) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3235 m->max_footprint = m->footprint; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3236 assert(is_aligned(chunk2mem(p))); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3237 check_mmapped_chunk(m, p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3238 return chunk2mem(p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3239 } |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3240 } |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3241 return 0; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3242 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3243 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3244 /* Realloc using mmap */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3245 static mchunkptr |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3246 mmap_resize(mstate m, mchunkptr oldp, size_t nb) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3247 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3248 size_t oldsize = chunksize(oldp); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3249 if (is_small(nb)) /* Can't shrink mmap regions below small size */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3250 return 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3251 /* Keep old chunk if big enough but not too big */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3252 if (oldsize >= nb + SIZE_T_SIZE && |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3253 (oldsize - nb) <= (mparams.granularity << 1)) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3254 return oldp; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3255 else { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3256 size_t offset = oldp->prev_foot & ~IS_MMAPPED_BIT; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3257 size_t oldmmsize = oldsize + offset + MMAP_FOOT_PAD; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3258 size_t newmmsize = granularity_align(nb + SIX_SIZE_T_SIZES + |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3259 CHUNK_ALIGN_MASK); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3260 char *cp = (char *) CALL_MREMAP((char *) oldp - offset, |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3261 oldmmsize, newmmsize, 1); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3262 if (cp != CMFAIL) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3263 mchunkptr newp = (mchunkptr) (cp + offset); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3264 size_t psize = newmmsize - offset - MMAP_FOOT_PAD; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3265 newp->head = (psize | CINUSE_BIT); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3266 mark_inuse_foot(m, newp, psize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3267 chunk_plus_offset(newp, psize)->head = FENCEPOST_HEAD; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3268 chunk_plus_offset(newp, psize + SIZE_T_SIZE)->head = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3269 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3270 if (cp < m->least_addr) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3271 m->least_addr = cp; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3272 if ((m->footprint += newmmsize - oldmmsize) > m->max_footprint) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3273 m->max_footprint = m->footprint; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3274 check_mmapped_chunk(m, newp); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3275 return newp; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3276 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3277 } |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3278 return 0; |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3279 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3280 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3281 /* -------------------------- mspace management -------------------------- */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3282 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3283 /* Initialize top chunk and its size */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3284 static void |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3285 init_top(mstate m, mchunkptr p, size_t psize) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3286 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3287 /* Ensure alignment */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3288 size_t offset = align_offset(chunk2mem(p)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3289 p = (mchunkptr) ((char *) p + offset); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3290 psize -= offset; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3291 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3292 m->top = p; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3293 m->topsize = psize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3294 p->head = psize | PINUSE_BIT; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3295 /* set size of fake trailing chunk holding overhead space only once */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3296 chunk_plus_offset(p, psize)->head = TOP_FOOT_SIZE; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3297 m->trim_check = mparams.trim_threshold; /* reset on each update */ |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3298 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3299 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3300 /* Initialize bins for a new mstate that is otherwise zeroed out */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3301 static void |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3302 init_bins(mstate m) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3303 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3304 /* Establish circular links for smallbins */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3305 bindex_t i; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3306 for (i = 0; i < NSMALLBINS; ++i) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3307 sbinptr bin = smallbin_at(m, i); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3308 bin->fd = bin->bk = bin; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3309 } |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3310 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3311 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3312 #if PROCEED_ON_ERROR |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3313 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3314 /* default corruption action */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3315 static void |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3316 reset_on_error(mstate m) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3317 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3318 int i; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3319 ++malloc_corruption_error_count; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3320 /* Reinitialize fields to forget about all memory */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3321 m->smallbins = m->treebins = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3322 m->dvsize = m->topsize = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3323 m->seg.base = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3324 m->seg.size = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3325 m->seg.next = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3326 m->top = m->dv = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3327 for (i = 0; i < NTREEBINS; ++i) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3328 *treebin_at(m, i) = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3329 init_bins(m); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3330 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3331 #endif /* PROCEED_ON_ERROR */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3332 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3333 /* Allocate chunk and prepend remainder with chunk in successor base. */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3334 static void * |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3335 prepend_alloc(mstate m, char *newbase, char *oldbase, size_t nb) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3336 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3337 mchunkptr p = align_as_chunk(newbase); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3338 mchunkptr oldfirst = align_as_chunk(oldbase); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3339 size_t psize = (char *) oldfirst - (char *) p; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3340 mchunkptr q = chunk_plus_offset(p, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3341 size_t qsize = psize - nb; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3342 set_size_and_pinuse_of_inuse_chunk(m, p, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3343 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3344 assert((char *) oldfirst > (char *) q); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3345 assert(pinuse(oldfirst)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3346 assert(qsize >= MIN_CHUNK_SIZE); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3347 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3348 /* consolidate remainder with first chunk of old base */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3349 if (oldfirst == m->top) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3350 size_t tsize = m->topsize += qsize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3351 m->top = q; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3352 q->head = tsize | PINUSE_BIT; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3353 check_top_chunk(m, q); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3354 } else if (oldfirst == m->dv) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3355 size_t dsize = m->dvsize += qsize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3356 m->dv = q; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3357 set_size_and_pinuse_of_free_chunk(q, dsize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3358 } else { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3359 if (!cinuse(oldfirst)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3360 size_t nsize = chunksize(oldfirst); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3361 unlink_chunk(m, oldfirst, nsize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3362 oldfirst = chunk_plus_offset(oldfirst, nsize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3363 qsize += nsize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3364 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3365 set_free_with_pinuse(q, qsize, oldfirst); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3366 insert_chunk(m, q, qsize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3367 check_free_chunk(m, q); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3368 } |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3369 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3370 check_malloced_chunk(m, chunk2mem(p), nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3371 return chunk2mem(p); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3372 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3373 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3374 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3375 /* Add a segment to hold a new noncontiguous region */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3376 static void |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3377 add_segment(mstate m, char *tbase, size_t tsize, flag_t mmapped) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3378 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3379 /* Determine locations and sizes of segment, fenceposts, old top */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3380 char *old_top = (char *) m->top; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3381 msegmentptr oldsp = segment_holding(m, old_top); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3382 char *old_end = oldsp->base + oldsp->size; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3383 size_t ssize = pad_request(sizeof(struct malloc_segment)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3384 char *rawsp = old_end - (ssize + FOUR_SIZE_T_SIZES + CHUNK_ALIGN_MASK); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3385 size_t offset = align_offset(chunk2mem(rawsp)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3386 char *asp = rawsp + offset; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3387 char *csp = (asp < (old_top + MIN_CHUNK_SIZE)) ? old_top : asp; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3388 mchunkptr sp = (mchunkptr) csp; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3389 msegmentptr ss = (msegmentptr) (chunk2mem(sp)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3390 mchunkptr tnext = chunk_plus_offset(sp, ssize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3391 mchunkptr p = tnext; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3392 int nfences = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3393 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3394 /* reset top to new space */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3395 init_top(m, (mchunkptr) tbase, tsize - TOP_FOOT_SIZE); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3396 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3397 /* Set up segment record */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3398 assert(is_aligned(ss)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3399 set_size_and_pinuse_of_inuse_chunk(m, sp, ssize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3400 *ss = m->seg; /* Push current record */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3401 m->seg.base = tbase; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3402 m->seg.size = tsize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3403 m->seg.sflags = mmapped; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3404 m->seg.next = ss; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3405 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3406 /* Insert trailing fenceposts */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3407 for (;;) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3408 mchunkptr nextp = chunk_plus_offset(p, SIZE_T_SIZE); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3409 p->head = FENCEPOST_HEAD; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3410 ++nfences; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3411 if ((char *) (&(nextp->head)) < old_end) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3412 p = nextp; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3413 else |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3414 break; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3415 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3416 assert(nfences >= 2); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3417 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3418 /* Insert the rest of old top into a bin as an ordinary free chunk */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3419 if (csp != old_top) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3420 mchunkptr q = (mchunkptr) old_top; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3421 size_t psize = csp - old_top; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3422 mchunkptr tn = chunk_plus_offset(q, psize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3423 set_free_with_pinuse(q, psize, tn); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3424 insert_chunk(m, q, psize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3425 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3426 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3427 check_top_chunk(m, m->top); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3428 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3429 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3430 /* -------------------------- System allocation -------------------------- */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3431 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3432 /* Get memory from system using MORECORE or MMAP */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3433 static void * |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3434 sys_alloc(mstate m, size_t nb) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3435 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3436 char *tbase = CMFAIL; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3437 size_t tsize = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3438 flag_t mmap_flag = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3439 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3440 init_mparams(); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3441 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3442 /* Directly map large chunks */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3443 if (use_mmap(m) && nb >= mparams.mmap_threshold) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3444 void *mem = mmap_alloc(m, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3445 if (mem != 0) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3446 return mem; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3447 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3448 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3449 /* |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3450 Try getting memory in any of three ways (in most-preferred to |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3451 least-preferred order): |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3452 1. A call to MORECORE that can normally contiguously extend memory. |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3453 (disabled if not MORECORE_CONTIGUOUS or not HAVE_MORECORE or |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3454 or main space is mmapped or a previous contiguous call failed) |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3455 2. A call to MMAP new space (disabled if not HAVE_MMAP). |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3456 Note that under the default settings, if MORECORE is unable to |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3457 fulfill a request, and HAVE_MMAP is true, then mmap is |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3458 used as a noncontiguous system allocator. This is a useful backup |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3459 strategy for systems with holes in address spaces -- in this case |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3460 sbrk cannot contiguously expand the heap, but mmap may be able to |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3461 find space. |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3462 3. A call to MORECORE that cannot usually contiguously extend memory. |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3463 (disabled if not HAVE_MORECORE) |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3464 */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3465 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3466 if (MORECORE_CONTIGUOUS && !use_noncontiguous(m)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3467 char *br = CMFAIL; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3468 msegmentptr ss = |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3469 (m->top == 0) ? 0 : segment_holding(m, (char *) m->top); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3470 size_t asize = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3471 ACQUIRE_MORECORE_LOCK(); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3472 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3473 if (ss == 0) { /* First time through or recovery */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3474 char *base = (char *) CALL_MORECORE(0); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3475 if (base != CMFAIL) { |
| 2203 | 3476 asize = |
| 3477 granularity_align(nb + TOP_FOOT_SIZE + MALLOC_ALIGNMENT + | |
| 3478 SIZE_T_ONE); | |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3479 /* Adjust to end on a page boundary */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3480 if (!is_page_aligned(base)) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3481 asize += (page_align((size_t) base) - (size_t) base); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3482 /* Can't call MORECORE if size is negative when treated as signed */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3483 if (asize < HALF_MAX_SIZE_T && |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3484 (br = (char *) (CALL_MORECORE(asize))) == base) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3485 tbase = base; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3486 tsize = asize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3487 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3488 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3489 } else { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3490 /* Subtract out existing available top space from MORECORE request. */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3491 asize = |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3492 granularity_align(nb - m->topsize + TOP_FOOT_SIZE + |
| 2203 | 3493 MALLOC_ALIGNMENT + SIZE_T_ONE); |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3494 /* Use mem here only if it did continuously extend old space */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3495 if (asize < HALF_MAX_SIZE_T && |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3496 (br = |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3497 (char *) (CALL_MORECORE(asize))) == ss->base + ss->size) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3498 tbase = br; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3499 tsize = asize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3500 } |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3501 } |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3502 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3503 if (tbase == CMFAIL) { /* Cope with partial failure */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3504 if (br != CMFAIL) { /* Try to use/extend the space we did get */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3505 if (asize < HALF_MAX_SIZE_T && |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3506 asize < nb + TOP_FOOT_SIZE + SIZE_T_ONE) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3507 size_t esize = |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3508 granularity_align(nb + TOP_FOOT_SIZE + |
| 2203 | 3509 MALLOC_ALIGNMENT + SIZE_T_ONE - |
| 3510 asize); | |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3511 if (esize < HALF_MAX_SIZE_T) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3512 char *end = (char *) CALL_MORECORE(esize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3513 if (end != CMFAIL) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3514 asize += esize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3515 else { /* Can't use; try to release */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3516 end = (char *) CALL_MORECORE(-asize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3517 br = CMFAIL; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3518 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3519 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3520 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3521 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3522 if (br != CMFAIL) { /* Use the space we did get */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3523 tbase = br; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3524 tsize = asize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3525 } else |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3526 disable_contiguous(m); /* Don't try contiguous path in the future */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3527 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3528 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3529 RELEASE_MORECORE_LOCK(); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3530 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3531 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3532 if (HAVE_MMAP && tbase == CMFAIL) { /* Try MMAP */ |
| 2203 | 3533 size_t req = nb + TOP_FOOT_SIZE + MALLOC_ALIGNMENT + SIZE_T_ONE; |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3534 size_t rsize = granularity_align(req); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3535 if (rsize > nb) { /* Fail if wraps around zero */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3536 char *mp = (char *) (CALL_MMAP(rsize)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3537 if (mp != CMFAIL) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3538 tbase = mp; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3539 tsize = rsize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3540 mmap_flag = IS_MMAPPED_BIT; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3541 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3542 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3543 } |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3544 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3545 if (HAVE_MORECORE && tbase == CMFAIL) { /* Try noncontiguous MORECORE */ |
| 2203 | 3546 size_t asize = |
| 3547 granularity_align(nb + TOP_FOOT_SIZE + MALLOC_ALIGNMENT + | |
| 3548 SIZE_T_ONE); | |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3549 if (asize < HALF_MAX_SIZE_T) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3550 char *br = CMFAIL; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3551 char *end = CMFAIL; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3552 ACQUIRE_MORECORE_LOCK(); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3553 br = (char *) (CALL_MORECORE(asize)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3554 end = (char *) (CALL_MORECORE(0)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3555 RELEASE_MORECORE_LOCK(); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3556 if (br != CMFAIL && end != CMFAIL && br < end) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3557 size_t ssize = end - br; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3558 if (ssize > nb + TOP_FOOT_SIZE) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3559 tbase = br; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3560 tsize = ssize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3561 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3562 } |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3563 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3564 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3565 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3566 if (tbase != CMFAIL) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3567 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3568 if ((m->footprint += tsize) > m->max_footprint) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3569 m->max_footprint = m->footprint; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3570 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3571 if (!is_initialized(m)) { /* first-time initialization */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3572 m->seg.base = m->least_addr = tbase; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3573 m->seg.size = tsize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3574 m->seg.sflags = mmap_flag; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3575 m->magic = mparams.magic; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3576 init_bins(m); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3577 if (is_global(m)) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3578 init_top(m, (mchunkptr) tbase, tsize - TOP_FOOT_SIZE); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3579 else { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3580 /* Offset top by embedded malloc_state */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3581 mchunkptr mn = next_chunk(mem2chunk(m)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3582 init_top(m, mn, |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3583 (size_t) ((tbase + tsize) - (char *) mn) - |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3584 TOP_FOOT_SIZE); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3585 } |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3586 } |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3587 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3588 else { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3589 /* Try to merge with an existing segment */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3590 msegmentptr sp = &m->seg; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3591 while (sp != 0 && tbase != sp->base + sp->size) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3592 sp = sp->next; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3593 if (sp != 0 && !is_extern_segment(sp) && (sp->sflags & IS_MMAPPED_BIT) == mmap_flag && segment_holds(sp, m->top)) { /* append */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3594 sp->size += tsize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3595 init_top(m, m->top, m->topsize + tsize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3596 } else { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3597 if (tbase < m->least_addr) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3598 m->least_addr = tbase; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3599 sp = &m->seg; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3600 while (sp != 0 && sp->base != tbase + tsize) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3601 sp = sp->next; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3602 if (sp != 0 && |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3603 !is_extern_segment(sp) && |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3604 (sp->sflags & IS_MMAPPED_BIT) == mmap_flag) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3605 char *oldbase = sp->base; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3606 sp->base = tbase; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3607 sp->size += tsize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3608 return prepend_alloc(m, tbase, oldbase, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3609 } else |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3610 add_segment(m, tbase, tsize, mmap_flag); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3611 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3612 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3613 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3614 if (nb < m->topsize) { /* Allocate from new or extended top space */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3615 size_t rsize = m->topsize -= nb; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3616 mchunkptr p = m->top; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3617 mchunkptr r = m->top = chunk_plus_offset(p, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3618 r->head = rsize | PINUSE_BIT; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3619 set_size_and_pinuse_of_inuse_chunk(m, p, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3620 check_top_chunk(m, m->top); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3621 check_malloced_chunk(m, chunk2mem(p), nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3622 return chunk2mem(p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3623 } |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3624 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3625 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3626 MALLOC_FAILURE_ACTION; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3627 return 0; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3628 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3629 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3630 /* ----------------------- system deallocation -------------------------- */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3631 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3632 /* Unmap and unlink any mmapped segments that don't contain used chunks */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3633 static size_t |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3634 release_unused_segments(mstate m) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3635 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3636 size_t released = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3637 msegmentptr pred = &m->seg; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3638 msegmentptr sp = pred->next; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3639 while (sp != 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3640 char *base = sp->base; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3641 size_t size = sp->size; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3642 msegmentptr next = sp->next; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3643 if (is_mmapped_segment(sp) && !is_extern_segment(sp)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3644 mchunkptr p = align_as_chunk(base); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3645 size_t psize = chunksize(p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3646 /* Can unmap if first chunk holds entire segment and not pinned */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3647 if (!cinuse(p) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3648 && (char *) p + psize >= base + size - TOP_FOOT_SIZE) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3649 tchunkptr tp = (tchunkptr) p; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3650 assert(segment_holds(sp, (char *) sp)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3651 if (p == m->dv) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3652 m->dv = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3653 m->dvsize = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3654 } else { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3655 unlink_large_chunk(m, tp); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3656 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3657 if (CALL_MUNMAP(base, size) == 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3658 released += size; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3659 m->footprint -= size; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3660 /* unlink obsoleted record */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3661 sp = pred; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3662 sp->next = next; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3663 } else { /* back out if cannot unmap */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3664 insert_large_chunk(m, tp, psize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3665 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3666 } |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3667 } |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3668 pred = sp; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3669 sp = next; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3670 } |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3671 return released; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3672 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3673 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3674 static int |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3675 sys_trim(mstate m, size_t pad) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3676 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3677 size_t released = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3678 if (pad < MAX_REQUEST && is_initialized(m)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3679 pad += TOP_FOOT_SIZE; /* ensure enough room for segment overhead */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3680 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3681 if (m->topsize > pad) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3682 /* Shrink top space in granularity-size units, keeping at least one */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3683 size_t unit = mparams.granularity; |
| 2203 | 3684 size_t extra = ((m->topsize - pad + (unit - SIZE_T_ONE)) / unit - |
| 3685 SIZE_T_ONE) * unit; | |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3686 msegmentptr sp = segment_holding(m, (char *) m->top); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3687 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3688 if (!is_extern_segment(sp)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3689 if (is_mmapped_segment(sp)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3690 if (HAVE_MMAP && sp->size >= extra && !has_segment_link(m, sp)) { /* can't shrink if pinned */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3691 size_t newsize = sp->size - extra; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3692 /* Prefer mremap, fall back to munmap */ |
| 2203 | 3693 if ((CALL_MREMAP(sp->base, sp->size, newsize, 0) != |
| 3694 MFAIL) | |
| 2210 | 3695 || (CALL_MUNMAP(sp->base + newsize, extra) == 0)) { |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3696 released = extra; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3697 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3698 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3699 } else if (HAVE_MORECORE) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3700 if (extra >= HALF_MAX_SIZE_T) /* Avoid wrapping negative */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3701 extra = (HALF_MAX_SIZE_T) + SIZE_T_ONE - unit; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3702 ACQUIRE_MORECORE_LOCK(); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3703 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3704 /* Make sure end of memory is where we last set it. */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3705 char *old_br = (char *) (CALL_MORECORE(0)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3706 if (old_br == sp->base + sp->size) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3707 char *rel_br = (char *) (CALL_MORECORE(-extra)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3708 char *new_br = (char *) (CALL_MORECORE(0)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3709 if (rel_br != CMFAIL && new_br < old_br) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3710 released = old_br - new_br; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3711 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3712 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3713 RELEASE_MORECORE_LOCK(); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3714 } |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3715 } |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3716 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3717 if (released != 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3718 sp->size -= released; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3719 m->footprint -= released; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3720 init_top(m, m->top, m->topsize - released); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3721 check_top_chunk(m, m->top); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3722 } |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3723 } |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3724 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3725 /* Unmap any unused mmapped segments */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3726 if (HAVE_MMAP) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3727 released += release_unused_segments(m); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3728 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3729 /* On failure, disable autotrim to avoid repeated failed future calls */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3730 if (released == 0) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3731 m->trim_check = MAX_SIZE_T; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3732 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3733 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3734 return (released != 0) ? 1 : 0; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3735 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3736 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3737 /* ---------------------------- malloc support --------------------------- */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3738 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3739 /* allocate a large request from the best fitting chunk in a treebin */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3740 static void * |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3741 tmalloc_large(mstate m, size_t nb) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3742 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3743 tchunkptr v = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3744 size_t rsize = -nb; /* Unsigned negation */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3745 tchunkptr t; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3746 bindex_t idx; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3747 compute_tree_index(nb, idx); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3748 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3749 if ((t = *treebin_at(m, idx)) != 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3750 /* Traverse tree for this bin looking for node with size == nb */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3751 size_t sizebits = nb << leftshift_for_tree_index(idx); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3752 tchunkptr rst = 0; /* The deepest untaken right subtree */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3753 for (;;) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3754 tchunkptr rt; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3755 size_t trem = chunksize(t) - nb; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3756 if (trem < rsize) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3757 v = t; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3758 if ((rsize = trem) == 0) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3759 break; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3760 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3761 rt = t->child[1]; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3762 t = t->child[(sizebits >> (SIZE_T_BITSIZE - SIZE_T_ONE)) & 1]; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3763 if (rt != 0 && rt != t) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3764 rst = rt; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3765 if (t == 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3766 t = rst; /* set t to least subtree holding sizes > nb */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3767 break; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3768 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3769 sizebits <<= 1; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3770 } |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3771 } |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3772 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3773 if (t == 0 && v == 0) { /* set t to root of next non-empty treebin */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3774 binmap_t leftbits = left_bits(idx2bit(idx)) & m->treemap; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3775 if (leftbits != 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3776 bindex_t i; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3777 binmap_t leastbit = least_bit(leftbits); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3778 compute_bit2idx(leastbit, i); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3779 t = *treebin_at(m, i); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3780 } |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3781 } |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3782 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3783 while (t != 0) { /* find smallest of tree or subtree */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3784 size_t trem = chunksize(t) - nb; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3785 if (trem < rsize) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3786 rsize = trem; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3787 v = t; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3788 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3789 t = leftmost_child(t); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3790 } |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3791 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3792 /* If dv is a better fit, return 0 so malloc will use it */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3793 if (v != 0 && rsize < (size_t) (m->dvsize - nb)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3794 if (RTCHECK(ok_address(m, v))) { /* split */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3795 mchunkptr r = chunk_plus_offset(v, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3796 assert(chunksize(v) == rsize + nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3797 if (RTCHECK(ok_next(v, r))) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3798 unlink_large_chunk(m, v); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3799 if (rsize < MIN_CHUNK_SIZE) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3800 set_inuse_and_pinuse(m, v, (rsize + nb)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3801 else { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3802 set_size_and_pinuse_of_inuse_chunk(m, v, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3803 set_size_and_pinuse_of_free_chunk(r, rsize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3804 insert_chunk(m, r, rsize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3805 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3806 return chunk2mem(v); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3807 } |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3808 } |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3809 CORRUPTION_ERROR_ACTION(m); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3810 } |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3811 return 0; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3812 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3813 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3814 /* allocate a small request from the best fitting chunk in a treebin */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3815 static void * |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3816 tmalloc_small(mstate m, size_t nb) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3817 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3818 tchunkptr t, v; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3819 size_t rsize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3820 bindex_t i; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3821 binmap_t leastbit = least_bit(m->treemap); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3822 compute_bit2idx(leastbit, i); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3823 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3824 v = t = *treebin_at(m, i); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3825 rsize = chunksize(t) - nb; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3826 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3827 while ((t = leftmost_child(t)) != 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3828 size_t trem = chunksize(t) - nb; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3829 if (trem < rsize) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3830 rsize = trem; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3831 v = t; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3832 } |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3833 } |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3834 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3835 if (RTCHECK(ok_address(m, v))) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3836 mchunkptr r = chunk_plus_offset(v, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3837 assert(chunksize(v) == rsize + nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3838 if (RTCHECK(ok_next(v, r))) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3839 unlink_large_chunk(m, v); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3840 if (rsize < MIN_CHUNK_SIZE) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3841 set_inuse_and_pinuse(m, v, (rsize + nb)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3842 else { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3843 set_size_and_pinuse_of_inuse_chunk(m, v, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3844 set_size_and_pinuse_of_free_chunk(r, rsize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3845 replace_dv(m, r, rsize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3846 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3847 return chunk2mem(v); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3848 } |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3849 } |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3850 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3851 CORRUPTION_ERROR_ACTION(m); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3852 return 0; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3853 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3854 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3855 /* --------------------------- realloc support --------------------------- */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3856 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3857 static void * |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3858 internal_realloc(mstate m, void *oldmem, size_t bytes) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3859 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3860 if (bytes >= MAX_REQUEST) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3861 MALLOC_FAILURE_ACTION; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3862 return 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3863 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3864 if (!PREACTION(m)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3865 mchunkptr oldp = mem2chunk(oldmem); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3866 size_t oldsize = chunksize(oldp); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3867 mchunkptr next = chunk_plus_offset(oldp, oldsize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3868 mchunkptr newp = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3869 void *extra = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3870 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3871 /* Try to either shrink or extend into top. Else malloc-copy-free */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3872 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3873 if (RTCHECK(ok_address(m, oldp) && ok_cinuse(oldp) && |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3874 ok_next(oldp, next) && ok_pinuse(next))) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3875 size_t nb = request2size(bytes); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3876 if (is_mmapped(oldp)) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3877 newp = mmap_resize(m, oldp, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3878 else if (oldsize >= nb) { /* already big enough */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3879 size_t rsize = oldsize - nb; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3880 newp = oldp; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3881 if (rsize >= MIN_CHUNK_SIZE) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3882 mchunkptr remainder = chunk_plus_offset(newp, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3883 set_inuse(m, newp, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3884 set_inuse(m, remainder, rsize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3885 extra = chunk2mem(remainder); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3886 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3887 } else if (next == m->top && oldsize + m->topsize > nb) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3888 /* Expand into top */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3889 size_t newsize = oldsize + m->topsize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3890 size_t newtopsize = newsize - nb; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3891 mchunkptr newtop = chunk_plus_offset(oldp, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3892 set_inuse(m, oldp, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3893 newtop->head = newtopsize | PINUSE_BIT; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3894 m->top = newtop; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3895 m->topsize = newtopsize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3896 newp = oldp; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3897 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3898 } else { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3899 USAGE_ERROR_ACTION(m, oldmem); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3900 POSTACTION(m); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3901 return 0; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3902 } |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3903 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3904 POSTACTION(m); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3905 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3906 if (newp != 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3907 if (extra != 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3908 internal_free(m, extra); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3909 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3910 check_inuse_chunk(m, newp); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3911 return chunk2mem(newp); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3912 } else { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3913 void *newmem = internal_malloc(m, bytes); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3914 if (newmem != 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3915 size_t oc = oldsize - overhead_for(oldp); |
|
2196
2aee80dab68a
Reverted r3255:3256. Don't actually need it unless the build is broken. :)
Ryan C. Gordon <icculus@icculus.org>
parents:
2194
diff
changeset
|
3916 memcpy(newmem, oldmem, (oc < bytes) ? oc : bytes); |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3917 internal_free(m, oldmem); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3918 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3919 return newmem; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3920 } |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3921 } |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3922 return 0; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3923 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3924 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3925 /* --------------------------- memalign support -------------------------- */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3926 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3927 static void * |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3928 internal_memalign(mstate m, size_t alignment, size_t bytes) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3929 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3930 if (alignment <= MALLOC_ALIGNMENT) /* Can just use malloc */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3931 return internal_malloc(m, bytes); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3932 if (alignment < MIN_CHUNK_SIZE) /* must be at least a minimum chunk size */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3933 alignment = MIN_CHUNK_SIZE; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3934 if ((alignment & (alignment - SIZE_T_ONE)) != 0) { /* Ensure a power of 2 */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3935 size_t a = MALLOC_ALIGNMENT << 1; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3936 while (a < alignment) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3937 a <<= 1; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3938 alignment = a; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3939 } |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3940 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3941 if (bytes >= MAX_REQUEST - alignment) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3942 if (m != 0) { /* Test isn't needed but avoids compiler warning */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3943 MALLOC_FAILURE_ACTION; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
3944 } |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3945 } else { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3946 size_t nb = request2size(bytes); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3947 size_t req = nb + alignment + MIN_CHUNK_SIZE - CHUNK_OVERHEAD; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3948 char *mem = (char *) internal_malloc(m, req); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3949 if (mem != 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3950 void *leader = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3951 void *trailer = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3952 mchunkptr p = mem2chunk(mem); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3953 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3954 if (PREACTION(m)) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3955 return 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3956 if ((((size_t) (mem)) % alignment) != 0) { /* misaligned */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3957 /* |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3958 Find an aligned spot inside chunk. Since we need to give |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3959 back leading space in a chunk of at least MIN_CHUNK_SIZE, if |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3960 the first calculation places us at a spot with less than |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3961 MIN_CHUNK_SIZE leader, we can move to the next aligned spot. |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3962 We've allocated enough total room so that this is always |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3963 possible. |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3964 */ |
| 2203 | 3965 char *br = (char *) mem2chunk((size_t) (((size_t) (mem + |
| 3966 alignment - | |
| 3967 SIZE_T_ONE)) | |
| 3968 & -alignment)); | |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3969 char *pos = |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3970 ((size_t) (br - (char *) (p)) >= |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3971 MIN_CHUNK_SIZE) ? br : br + alignment; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3972 mchunkptr newp = (mchunkptr) pos; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3973 size_t leadsize = pos - (char *) (p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3974 size_t newsize = chunksize(p) - leadsize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3975 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3976 if (is_mmapped(p)) { /* For mmapped chunks, just adjust offset */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3977 newp->prev_foot = p->prev_foot + leadsize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3978 newp->head = (newsize | CINUSE_BIT); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3979 } else { /* Otherwise, give back leader, use the rest */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3980 set_inuse(m, newp, newsize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3981 set_inuse(m, p, leadsize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3982 leader = chunk2mem(p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3983 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3984 p = newp; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3985 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3986 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3987 /* Give back spare room at the end */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3988 if (!is_mmapped(p)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3989 size_t size = chunksize(p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3990 if (size > nb + MIN_CHUNK_SIZE) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3991 size_t remainder_size = size - nb; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3992 mchunkptr remainder = chunk_plus_offset(p, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3993 set_inuse(m, p, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3994 set_inuse(m, remainder, remainder_size); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3995 trailer = chunk2mem(remainder); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3996 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3997 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3998 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
3999 assert(chunksize(p) >= nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4000 assert((((size_t) (chunk2mem(p))) % alignment) == 0); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4001 check_inuse_chunk(m, p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4002 POSTACTION(m); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4003 if (leader != 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4004 internal_free(m, leader); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4005 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4006 if (trailer != 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4007 internal_free(m, trailer); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4008 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4009 return chunk2mem(p); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4010 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4011 } |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4012 return 0; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4013 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4014 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4015 /* ------------------------ comalloc/coalloc support --------------------- */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4016 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4017 static void ** |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4018 ialloc(mstate m, size_t n_elements, size_t * sizes, int opts, void *chunks[]) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4019 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4020 /* |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4021 This provides common support for independent_X routines, handling |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4022 all of the combinations that can result. |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4023 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4024 The opts arg has: |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4025 bit 0 set if all elements are same size (using sizes[0]) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4026 bit 1 set if elements should be zeroed |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4027 */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4028 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4029 size_t element_size; /* chunksize of each element, if all same */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4030 size_t contents_size; /* total size of elements */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4031 size_t array_size; /* request size of pointer array */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4032 void *mem; /* malloced aggregate space */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4033 mchunkptr p; /* corresponding chunk */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4034 size_t remainder_size; /* remaining bytes while splitting */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4035 void **marray; /* either "chunks" or malloced ptr array */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4036 mchunkptr array_chunk; /* chunk for malloced ptr array */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4037 flag_t was_enabled; /* to disable mmap */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4038 size_t size; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4039 size_t i; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4040 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4041 /* compute array length, if needed */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4042 if (chunks != 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4043 if (n_elements == 0) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4044 return chunks; /* nothing to do */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4045 marray = chunks; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4046 array_size = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4047 } else { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4048 /* if empty req, must still return chunk representing empty array */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4049 if (n_elements == 0) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4050 return (void **) internal_malloc(m, 0); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4051 marray = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4052 array_size = request2size(n_elements * (sizeof(void *))); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4053 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4054 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4055 /* compute total element size */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4056 if (opts & 0x1) { /* all-same-size */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4057 element_size = request2size(*sizes); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4058 contents_size = n_elements * element_size; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4059 } else { /* add up all the sizes */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4060 element_size = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4061 contents_size = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4062 for (i = 0; i != n_elements; ++i) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4063 contents_size += request2size(sizes[i]); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4064 } |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4065 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4066 size = contents_size + array_size; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4067 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4068 /* |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4069 Allocate the aggregate chunk. First disable direct-mmapping so |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4070 malloc won't use it, since we would not be able to later |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4071 free/realloc space internal to a segregated mmap region. |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4072 */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4073 was_enabled = use_mmap(m); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4074 disable_mmap(m); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4075 mem = internal_malloc(m, size - CHUNK_OVERHEAD); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4076 if (was_enabled) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4077 enable_mmap(m); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4078 if (mem == 0) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4079 return 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4080 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4081 if (PREACTION(m)) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4082 return 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4083 p = mem2chunk(mem); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4084 remainder_size = chunksize(p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4085 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4086 assert(!is_mmapped(p)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4087 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4088 if (opts & 0x2) { /* optionally clear the elements */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4089 memset((size_t *) mem, 0, remainder_size - SIZE_T_SIZE - array_size); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4090 } |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4091 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4092 /* If not provided, allocate the pointer array as final part of chunk */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4093 if (marray == 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4094 size_t array_chunk_size; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4095 array_chunk = chunk_plus_offset(p, contents_size); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4096 array_chunk_size = remainder_size - contents_size; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4097 marray = (void **) (chunk2mem(array_chunk)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4098 set_size_and_pinuse_of_inuse_chunk(m, array_chunk, array_chunk_size); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4099 remainder_size = contents_size; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4100 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4101 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4102 /* split out elements */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4103 for (i = 0;; ++i) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4104 marray[i] = chunk2mem(p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4105 if (i != n_elements - 1) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4106 if (element_size != 0) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4107 size = element_size; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4108 else |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4109 size = request2size(sizes[i]); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4110 remainder_size -= size; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4111 set_size_and_pinuse_of_inuse_chunk(m, p, size); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4112 p = chunk_plus_offset(p, size); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4113 } else { /* the final element absorbs any overallocation slop */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4114 set_size_and_pinuse_of_inuse_chunk(m, p, remainder_size); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4115 break; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4116 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4117 } |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4118 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4119 #if DEBUG |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4120 if (marray != chunks) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4121 /* final element must have exactly exhausted chunk */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4122 if (element_size != 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4123 assert(remainder_size == element_size); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4124 } else { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4125 assert(remainder_size == request2size(sizes[i])); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4126 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4127 check_inuse_chunk(m, mem2chunk(marray)); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4128 } |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4129 for (i = 0; i != n_elements; ++i) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4130 check_inuse_chunk(m, mem2chunk(marray[i])); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4131 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4132 #endif /* DEBUG */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4133 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4134 POSTACTION(m); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4135 return marray; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4136 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4137 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4138 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4139 /* -------------------------- public routines ---------------------------- */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4140 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4141 #if !ONLY_MSPACES |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4142 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4143 void * |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4144 dlmalloc(size_t bytes) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4145 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4146 /* |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4147 Basic algorithm: |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4148 If a small request (< 256 bytes minus per-chunk overhead): |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4149 1. If one exists, use a remainderless chunk in associated smallbin. |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4150 (Remainderless means that there are too few excess bytes to |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4151 represent as a chunk.) |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4152 2. If it is big enough, use the dv chunk, which is normally the |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4153 chunk adjacent to the one used for the most recent small request. |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4154 3. If one exists, split the smallest available chunk in a bin, |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4155 saving remainder in dv. |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4156 4. If it is big enough, use the top chunk. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4157 5. If available, get memory from system and use it |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4158 Otherwise, for a large request: |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4159 1. Find the smallest available binned chunk that fits, and use it |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4160 if it is better fitting than dv chunk, splitting if necessary. |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4161 2. If better fitting than any binned chunk, use the dv chunk. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4162 3. If it is big enough, use the top chunk. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4163 4. If request size >= mmap threshold, try to directly mmap this chunk. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4164 5. If available, get memory from system and use it |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4165 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4166 The ugly goto's here ensure that postaction occurs along all paths. |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4167 */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4168 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4169 if (!PREACTION(gm)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4170 void *mem; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4171 size_t nb; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4172 if (bytes <= MAX_SMALL_REQUEST) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4173 bindex_t idx; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4174 binmap_t smallbits; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4175 nb = (bytes < MIN_REQUEST) ? MIN_CHUNK_SIZE : pad_request(bytes); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4176 idx = small_index(nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4177 smallbits = gm->smallmap >> idx; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4178 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4179 if ((smallbits & 0x3U) != 0) { /* Remainderless fit to a smallbin. */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4180 mchunkptr b, p; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4181 idx += ~smallbits & 1; /* Uses next bin if idx empty */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4182 b = smallbin_at(gm, idx); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4183 p = b->fd; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4184 assert(chunksize(p) == small_index2size(idx)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4185 unlink_first_small_chunk(gm, b, p, idx); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4186 set_inuse_and_pinuse(gm, p, small_index2size(idx)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4187 mem = chunk2mem(p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4188 check_malloced_chunk(gm, mem, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4189 goto postaction; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4190 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4191 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4192 else if (nb > gm->dvsize) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4193 if (smallbits != 0) { /* Use chunk in next nonempty smallbin */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4194 mchunkptr b, p, r; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4195 size_t rsize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4196 bindex_t i; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4197 binmap_t leftbits = |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4198 (smallbits << idx) & left_bits(idx2bit(idx)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4199 binmap_t leastbit = least_bit(leftbits); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4200 compute_bit2idx(leastbit, i); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4201 b = smallbin_at(gm, i); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4202 p = b->fd; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4203 assert(chunksize(p) == small_index2size(i)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4204 unlink_first_small_chunk(gm, b, p, i); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4205 rsize = small_index2size(i) - nb; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4206 /* Fit here cannot be remainderless if 4byte sizes */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4207 if (SIZE_T_SIZE != 4 && rsize < MIN_CHUNK_SIZE) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4208 set_inuse_and_pinuse(gm, p, small_index2size(i)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4209 else { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4210 set_size_and_pinuse_of_inuse_chunk(gm, p, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4211 r = chunk_plus_offset(p, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4212 set_size_and_pinuse_of_free_chunk(r, rsize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4213 replace_dv(gm, r, rsize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4214 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4215 mem = chunk2mem(p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4216 check_malloced_chunk(gm, mem, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4217 goto postaction; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4218 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4219 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4220 else if (gm->treemap != 0 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4221 && (mem = tmalloc_small(gm, nb)) != 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4222 check_malloced_chunk(gm, mem, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4223 goto postaction; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4224 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4225 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4226 } else if (bytes >= MAX_REQUEST) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4227 nb = MAX_SIZE_T; /* Too big to allocate. Force failure (in sys alloc) */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4228 else { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4229 nb = pad_request(bytes); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4230 if (gm->treemap != 0 && (mem = tmalloc_large(gm, nb)) != 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4231 check_malloced_chunk(gm, mem, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4232 goto postaction; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4233 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4234 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4235 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4236 if (nb <= gm->dvsize) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4237 size_t rsize = gm->dvsize - nb; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4238 mchunkptr p = gm->dv; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4239 if (rsize >= MIN_CHUNK_SIZE) { /* split dv */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4240 mchunkptr r = gm->dv = chunk_plus_offset(p, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4241 gm->dvsize = rsize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4242 set_size_and_pinuse_of_free_chunk(r, rsize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4243 set_size_and_pinuse_of_inuse_chunk(gm, p, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4244 } else { /* exhaust dv */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4245 size_t dvs = gm->dvsize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4246 gm->dvsize = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4247 gm->dv = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4248 set_inuse_and_pinuse(gm, p, dvs); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4249 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4250 mem = chunk2mem(p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4251 check_malloced_chunk(gm, mem, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4252 goto postaction; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4253 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4254 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4255 else if (nb < gm->topsize) { /* Split top */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4256 size_t rsize = gm->topsize -= nb; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4257 mchunkptr p = gm->top; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4258 mchunkptr r = gm->top = chunk_plus_offset(p, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4259 r->head = rsize | PINUSE_BIT; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4260 set_size_and_pinuse_of_inuse_chunk(gm, p, nb); |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4261 mem = chunk2mem(p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4262 check_top_chunk(gm, gm->top); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4263 check_malloced_chunk(gm, mem, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4264 goto postaction; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4265 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4266 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4267 mem = sys_alloc(gm, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4268 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4269 postaction: |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4270 POSTACTION(gm); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4271 return mem; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4272 } |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4273 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4274 return 0; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4275 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4276 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4277 void |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4278 dlfree(void *mem) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4279 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4280 /* |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4281 Consolidate freed chunks with preceeding or succeeding bordering |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4282 free chunks, if they exist, and then place in a bin. Intermixed |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4283 with special cases for top, dv, mmapped chunks, and usage errors. |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4284 */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4285 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4286 if (mem != 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4287 mchunkptr p = mem2chunk(mem); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4288 #if FOOTERS |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4289 mstate fm = get_mstate_for(p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4290 if (!ok_magic(fm)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4291 USAGE_ERROR_ACTION(fm, p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4292 return; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4293 } |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4294 #else /* FOOTERS */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4295 #define fm gm |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4296 #endif /* FOOTERS */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4297 if (!PREACTION(fm)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4298 check_inuse_chunk(fm, p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4299 if (RTCHECK(ok_address(fm, p) && ok_cinuse(p))) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4300 size_t psize = chunksize(p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4301 mchunkptr next = chunk_plus_offset(p, psize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4302 if (!pinuse(p)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4303 size_t prevsize = p->prev_foot; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4304 if ((prevsize & IS_MMAPPED_BIT) != 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4305 prevsize &= ~IS_MMAPPED_BIT; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4306 psize += prevsize + MMAP_FOOT_PAD; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4307 if (CALL_MUNMAP((char *) p - prevsize, psize) == 0) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4308 fm->footprint -= psize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4309 goto postaction; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4310 } else { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4311 mchunkptr prev = chunk_minus_offset(p, prevsize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4312 psize += prevsize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4313 p = prev; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4314 if (RTCHECK(ok_address(fm, prev))) { /* consolidate backward */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4315 if (p != fm->dv) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4316 unlink_chunk(fm, p, prevsize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4317 } else if ((next->head & INUSE_BITS) == |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4318 INUSE_BITS) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4319 fm->dvsize = psize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4320 set_free_with_pinuse(p, psize, next); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4321 goto postaction; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4322 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4323 } else |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4324 goto erroraction; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4325 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4326 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4327 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4328 if (RTCHECK(ok_next(p, next) && ok_pinuse(next))) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4329 if (!cinuse(next)) { /* consolidate forward */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4330 if (next == fm->top) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4331 size_t tsize = fm->topsize += psize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4332 fm->top = p; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4333 p->head = tsize | PINUSE_BIT; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4334 if (p == fm->dv) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4335 fm->dv = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4336 fm->dvsize = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4337 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4338 if (should_trim(fm, tsize)) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4339 sys_trim(fm, 0); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4340 goto postaction; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4341 } else if (next == fm->dv) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4342 size_t dsize = fm->dvsize += psize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4343 fm->dv = p; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4344 set_size_and_pinuse_of_free_chunk(p, dsize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4345 goto postaction; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4346 } else { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4347 size_t nsize = chunksize(next); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4348 psize += nsize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4349 unlink_chunk(fm, next, nsize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4350 set_size_and_pinuse_of_free_chunk(p, psize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4351 if (p == fm->dv) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4352 fm->dvsize = psize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4353 goto postaction; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4354 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4355 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4356 } else |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4357 set_free_with_pinuse(p, psize, next); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4358 insert_chunk(fm, p, psize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4359 check_free_chunk(fm, p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4360 goto postaction; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4361 } |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4362 } |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4363 erroraction: |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4364 USAGE_ERROR_ACTION(fm, p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4365 postaction: |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4366 POSTACTION(fm); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4367 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4368 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4369 #if !FOOTERS |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4370 #undef fm |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4371 #endif /* FOOTERS */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4372 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4373 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4374 void * |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4375 dlcalloc(size_t n_elements, size_t elem_size) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4376 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4377 void *mem; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4378 size_t req = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4379 if (n_elements != 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4380 req = n_elements * elem_size; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4381 if (((n_elements | elem_size) & ~(size_t) 0xffff) && |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4382 (req / n_elements != elem_size)) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4383 req = MAX_SIZE_T; /* force downstream failure on overflow */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4384 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4385 mem = dlmalloc(req); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4386 if (mem != 0 && calloc_must_clear(mem2chunk(mem))) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4387 memset(mem, 0, req); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4388 return mem; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4389 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4390 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4391 void * |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4392 dlrealloc(void *oldmem, size_t bytes) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4393 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4394 if (oldmem == 0) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4395 return dlmalloc(bytes); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4396 #ifdef REALLOC_ZERO_BYTES_FREES |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4397 if (bytes == 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4398 dlfree(oldmem); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4399 return 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4400 } |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4401 #endif /* REALLOC_ZERO_BYTES_FREES */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4402 else { |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4403 #if ! FOOTERS |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4404 mstate m = gm; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4405 #else /* FOOTERS */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4406 mstate m = get_mstate_for(mem2chunk(oldmem)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4407 if (!ok_magic(m)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4408 USAGE_ERROR_ACTION(m, oldmem); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4409 return 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4410 } |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4411 #endif /* FOOTERS */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4412 return internal_realloc(m, oldmem, bytes); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4413 } |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4414 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4415 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4416 void * |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4417 dlmemalign(size_t alignment, size_t bytes) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4418 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4419 return internal_memalign(gm, alignment, bytes); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4420 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4421 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4422 void ** |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4423 dlindependent_calloc(size_t n_elements, size_t elem_size, void *chunks[]) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4424 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4425 size_t sz = elem_size; /* serves as 1-element array */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4426 return ialloc(gm, n_elements, &sz, 3, chunks); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4427 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4428 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4429 void ** |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4430 dlindependent_comalloc(size_t n_elements, size_t sizes[], void *chunks[]) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4431 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4432 return ialloc(gm, n_elements, sizes, 0, chunks); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4433 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4434 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4435 void * |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4436 dlvalloc(size_t bytes) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4437 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4438 size_t pagesz; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4439 init_mparams(); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4440 pagesz = mparams.page_size; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4441 return dlmemalign(pagesz, bytes); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4442 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4443 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4444 void * |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4445 dlpvalloc(size_t bytes) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4446 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4447 size_t pagesz; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4448 init_mparams(); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4449 pagesz = mparams.page_size; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4450 return dlmemalign(pagesz, |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4451 (bytes + pagesz - SIZE_T_ONE) & ~(pagesz - SIZE_T_ONE)); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4452 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4453 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4454 int |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4455 dlmalloc_trim(size_t pad) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4456 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4457 int result = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4458 if (!PREACTION(gm)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4459 result = sys_trim(gm, pad); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4460 POSTACTION(gm); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4461 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4462 return result; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4463 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4464 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4465 size_t |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4466 dlmalloc_footprint(void) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4467 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4468 return gm->footprint; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4469 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4470 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4471 size_t |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4472 dlmalloc_max_footprint(void) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4473 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4474 return gm->max_footprint; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4475 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4476 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4477 #if !NO_MALLINFO |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4478 struct mallinfo |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4479 dlmallinfo(void) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4480 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4481 return internal_mallinfo(gm); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4482 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4483 #endif /* NO_MALLINFO */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4484 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4485 void |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4486 dlmalloc_stats() |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4487 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4488 internal_malloc_stats(gm); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4489 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4490 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4491 size_t |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4492 dlmalloc_usable_size(void *mem) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4493 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4494 if (mem != 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4495 mchunkptr p = mem2chunk(mem); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4496 if (cinuse(p)) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4497 return chunksize(p) - overhead_for(p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4498 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4499 return 0; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4500 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4501 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4502 int |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4503 dlmallopt(int param_number, int value) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4504 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4505 return change_mparam(param_number, value); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4506 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4507 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4508 #endif /* !ONLY_MSPACES */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4509 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4510 /* ----------------------------- user mspaces ---------------------------- */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4511 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4512 #if MSPACES |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4513 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4514 static mstate |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4515 init_user_mstate(char *tbase, size_t tsize) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4516 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4517 size_t msize = pad_request(sizeof(struct malloc_state)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4518 mchunkptr mn; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4519 mchunkptr msp = align_as_chunk(tbase); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4520 mstate m = (mstate) (chunk2mem(msp)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4521 memset(m, 0, msize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4522 INITIAL_LOCK(&m->mutex); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4523 msp->head = (msize | PINUSE_BIT | CINUSE_BIT); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4524 m->seg.base = m->least_addr = tbase; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4525 m->seg.size = m->footprint = m->max_footprint = tsize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4526 m->magic = mparams.magic; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4527 m->mflags = mparams.default_mflags; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4528 disable_contiguous(m); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4529 init_bins(m); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4530 mn = next_chunk(mem2chunk(m)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4531 init_top(m, mn, (size_t) ((tbase + tsize) - (char *) mn) - TOP_FOOT_SIZE); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4532 check_top_chunk(m, m->top); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4533 return m; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4534 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4535 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4536 mspace |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4537 create_mspace(size_t capacity, int locked) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4538 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4539 mstate m = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4540 size_t msize = pad_request(sizeof(struct malloc_state)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4541 init_mparams(); /* Ensure pagesize etc initialized */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4542 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4543 if (capacity < (size_t) - (msize + TOP_FOOT_SIZE + mparams.page_size)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4544 size_t rs = ((capacity == 0) ? mparams.granularity : |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4545 (capacity + TOP_FOOT_SIZE + msize)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4546 size_t tsize = granularity_align(rs); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4547 char *tbase = (char *) (CALL_MMAP(tsize)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4548 if (tbase != CMFAIL) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4549 m = init_user_mstate(tbase, tsize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4550 m->seg.sflags = IS_MMAPPED_BIT; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4551 set_lock(m, locked); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4552 } |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4553 } |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4554 return (mspace) m; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4555 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4556 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4557 mspace |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4558 create_mspace_with_base(void *base, size_t capacity, int locked) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4559 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4560 mstate m = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4561 size_t msize = pad_request(sizeof(struct malloc_state)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4562 init_mparams(); /* Ensure pagesize etc initialized */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4563 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4564 if (capacity > msize + TOP_FOOT_SIZE && |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4565 capacity < (size_t) - (msize + TOP_FOOT_SIZE + mparams.page_size)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4566 m = init_user_mstate((char *) base, capacity); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4567 m->seg.sflags = EXTERN_BIT; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4568 set_lock(m, locked); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4569 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4570 return (mspace) m; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4571 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4572 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4573 size_t |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4574 destroy_mspace(mspace msp) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4575 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4576 size_t freed = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4577 mstate ms = (mstate) msp; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4578 if (ok_magic(ms)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4579 msegmentptr sp = &ms->seg; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4580 while (sp != 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4581 char *base = sp->base; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4582 size_t size = sp->size; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4583 flag_t flag = sp->sflags; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4584 sp = sp->next; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4585 if ((flag & IS_MMAPPED_BIT) && !(flag & EXTERN_BIT) && |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4586 CALL_MUNMAP(base, size) == 0) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4587 freed += size; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4588 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4589 } else { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4590 USAGE_ERROR_ACTION(ms, ms); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4591 } |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4592 return freed; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4593 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4594 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4595 /* |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4596 mspace versions of routines are near-clones of the global |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4597 versions. This is not so nice but better than the alternatives. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4598 */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4599 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4600 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4601 void * |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4602 mspace_malloc(mspace msp, size_t bytes) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4603 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4604 mstate ms = (mstate) msp; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4605 if (!ok_magic(ms)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4606 USAGE_ERROR_ACTION(ms, ms); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4607 return 0; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4608 } |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4609 if (!PREACTION(ms)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4610 void *mem; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4611 size_t nb; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4612 if (bytes <= MAX_SMALL_REQUEST) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4613 bindex_t idx; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4614 binmap_t smallbits; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4615 nb = (bytes < MIN_REQUEST) ? MIN_CHUNK_SIZE : pad_request(bytes); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4616 idx = small_index(nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4617 smallbits = ms->smallmap >> idx; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4618 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4619 if ((smallbits & 0x3U) != 0) { /* Remainderless fit to a smallbin. */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4620 mchunkptr b, p; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4621 idx += ~smallbits & 1; /* Uses next bin if idx empty */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4622 b = smallbin_at(ms, idx); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4623 p = b->fd; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4624 assert(chunksize(p) == small_index2size(idx)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4625 unlink_first_small_chunk(ms, b, p, idx); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4626 set_inuse_and_pinuse(ms, p, small_index2size(idx)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4627 mem = chunk2mem(p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4628 check_malloced_chunk(ms, mem, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4629 goto postaction; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4630 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4631 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4632 else if (nb > ms->dvsize) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4633 if (smallbits != 0) { /* Use chunk in next nonempty smallbin */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4634 mchunkptr b, p, r; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4635 size_t rsize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4636 bindex_t i; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4637 binmap_t leftbits = |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4638 (smallbits << idx) & left_bits(idx2bit(idx)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4639 binmap_t leastbit = least_bit(leftbits); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4640 compute_bit2idx(leastbit, i); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4641 b = smallbin_at(ms, i); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4642 p = b->fd; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4643 assert(chunksize(p) == small_index2size(i)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4644 unlink_first_small_chunk(ms, b, p, i); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4645 rsize = small_index2size(i) - nb; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4646 /* Fit here cannot be remainderless if 4byte sizes */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4647 if (SIZE_T_SIZE != 4 && rsize < MIN_CHUNK_SIZE) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4648 set_inuse_and_pinuse(ms, p, small_index2size(i)); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4649 else { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4650 set_size_and_pinuse_of_inuse_chunk(ms, p, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4651 r = chunk_plus_offset(p, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4652 set_size_and_pinuse_of_free_chunk(r, rsize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4653 replace_dv(ms, r, rsize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4654 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4655 mem = chunk2mem(p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4656 check_malloced_chunk(ms, mem, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4657 goto postaction; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4658 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4659 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4660 else if (ms->treemap != 0 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4661 && (mem = tmalloc_small(ms, nb)) != 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4662 check_malloced_chunk(ms, mem, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4663 goto postaction; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4664 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4665 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4666 } else if (bytes >= MAX_REQUEST) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4667 nb = MAX_SIZE_T; /* Too big to allocate. Force failure (in sys alloc) */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4668 else { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4669 nb = pad_request(bytes); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4670 if (ms->treemap != 0 && (mem = tmalloc_large(ms, nb)) != 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4671 check_malloced_chunk(ms, mem, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4672 goto postaction; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4673 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4674 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4675 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4676 if (nb <= ms->dvsize) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4677 size_t rsize = ms->dvsize - nb; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4678 mchunkptr p = ms->dv; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4679 if (rsize >= MIN_CHUNK_SIZE) { /* split dv */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4680 mchunkptr r = ms->dv = chunk_plus_offset(p, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4681 ms->dvsize = rsize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4682 set_size_and_pinuse_of_free_chunk(r, rsize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4683 set_size_and_pinuse_of_inuse_chunk(ms, p, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4684 } else { /* exhaust dv */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4685 size_t dvs = ms->dvsize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4686 ms->dvsize = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4687 ms->dv = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4688 set_inuse_and_pinuse(ms, p, dvs); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4689 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4690 mem = chunk2mem(p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4691 check_malloced_chunk(ms, mem, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4692 goto postaction; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4693 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4694 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4695 else if (nb < ms->topsize) { /* Split top */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4696 size_t rsize = ms->topsize -= nb; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4697 mchunkptr p = ms->top; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4698 mchunkptr r = ms->top = chunk_plus_offset(p, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4699 r->head = rsize | PINUSE_BIT; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4700 set_size_and_pinuse_of_inuse_chunk(ms, p, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4701 mem = chunk2mem(p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4702 check_top_chunk(ms, ms->top); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4703 check_malloced_chunk(ms, mem, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4704 goto postaction; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4705 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4706 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4707 mem = sys_alloc(ms, nb); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4708 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4709 postaction: |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4710 POSTACTION(ms); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4711 return mem; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4712 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4713 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4714 return 0; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4715 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4716 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4717 void |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4718 mspace_free(mspace msp, void *mem) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4719 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4720 if (mem != 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4721 mchunkptr p = mem2chunk(mem); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4722 #if FOOTERS |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4723 mstate fm = get_mstate_for(p); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4724 #else /* FOOTERS */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4725 mstate fm = (mstate) msp; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4726 #endif /* FOOTERS */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4727 if (!ok_magic(fm)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4728 USAGE_ERROR_ACTION(fm, p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4729 return; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4730 } |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4731 if (!PREACTION(fm)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4732 check_inuse_chunk(fm, p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4733 if (RTCHECK(ok_address(fm, p) && ok_cinuse(p))) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4734 size_t psize = chunksize(p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4735 mchunkptr next = chunk_plus_offset(p, psize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4736 if (!pinuse(p)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4737 size_t prevsize = p->prev_foot; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4738 if ((prevsize & IS_MMAPPED_BIT) != 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4739 prevsize &= ~IS_MMAPPED_BIT; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4740 psize += prevsize + MMAP_FOOT_PAD; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4741 if (CALL_MUNMAP((char *) p - prevsize, psize) == 0) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4742 fm->footprint -= psize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4743 goto postaction; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4744 } else { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4745 mchunkptr prev = chunk_minus_offset(p, prevsize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4746 psize += prevsize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4747 p = prev; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4748 if (RTCHECK(ok_address(fm, prev))) { /* consolidate backward */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4749 if (p != fm->dv) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4750 unlink_chunk(fm, p, prevsize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4751 } else if ((next->head & INUSE_BITS) == |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4752 INUSE_BITS) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4753 fm->dvsize = psize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4754 set_free_with_pinuse(p, psize, next); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4755 goto postaction; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4756 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4757 } else |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4758 goto erroraction; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4759 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4760 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4761 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4762 if (RTCHECK(ok_next(p, next) && ok_pinuse(next))) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4763 if (!cinuse(next)) { /* consolidate forward */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4764 if (next == fm->top) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4765 size_t tsize = fm->topsize += psize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4766 fm->top = p; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4767 p->head = tsize | PINUSE_BIT; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4768 if (p == fm->dv) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4769 fm->dv = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4770 fm->dvsize = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4771 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4772 if (should_trim(fm, tsize)) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4773 sys_trim(fm, 0); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4774 goto postaction; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4775 } else if (next == fm->dv) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4776 size_t dsize = fm->dvsize += psize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4777 fm->dv = p; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4778 set_size_and_pinuse_of_free_chunk(p, dsize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4779 goto postaction; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4780 } else { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4781 size_t nsize = chunksize(next); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4782 psize += nsize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4783 unlink_chunk(fm, next, nsize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4784 set_size_and_pinuse_of_free_chunk(p, psize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4785 if (p == fm->dv) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4786 fm->dvsize = psize; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4787 goto postaction; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4788 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4789 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4790 } else |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4791 set_free_with_pinuse(p, psize, next); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4792 insert_chunk(fm, p, psize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4793 check_free_chunk(fm, p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4794 goto postaction; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4795 } |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4796 } |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4797 erroraction: |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4798 USAGE_ERROR_ACTION(fm, p); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4799 postaction: |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4800 POSTACTION(fm); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4801 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4802 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4803 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4804 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4805 void * |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4806 mspace_calloc(mspace msp, size_t n_elements, size_t elem_size) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4807 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4808 void *mem; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4809 size_t req = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4810 mstate ms = (mstate) msp; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4811 if (!ok_magic(ms)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4812 USAGE_ERROR_ACTION(ms, ms); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4813 return 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4814 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4815 if (n_elements != 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4816 req = n_elements * elem_size; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4817 if (((n_elements | elem_size) & ~(size_t) 0xffff) && |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4818 (req / n_elements != elem_size)) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4819 req = MAX_SIZE_T; /* force downstream failure on overflow */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4820 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4821 mem = internal_malloc(ms, req); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4822 if (mem != 0 && calloc_must_clear(mem2chunk(mem))) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4823 memset(mem, 0, req); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4824 return mem; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4825 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4826 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4827 void * |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4828 mspace_realloc(mspace msp, void *oldmem, size_t bytes) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4829 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4830 if (oldmem == 0) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4831 return mspace_malloc(msp, bytes); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4832 #ifdef REALLOC_ZERO_BYTES_FREES |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4833 if (bytes == 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4834 mspace_free(msp, oldmem); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4835 return 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4836 } |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4837 #endif /* REALLOC_ZERO_BYTES_FREES */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4838 else { |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4839 #if FOOTERS |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4840 mchunkptr p = mem2chunk(oldmem); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4841 mstate ms = get_mstate_for(p); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4842 #else /* FOOTERS */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4843 mstate ms = (mstate) msp; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4844 #endif /* FOOTERS */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4845 if (!ok_magic(ms)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4846 USAGE_ERROR_ACTION(ms, ms); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4847 return 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4848 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4849 return internal_realloc(ms, oldmem, bytes); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4850 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4851 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4852 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4853 void * |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4854 mspace_memalign(mspace msp, size_t alignment, size_t bytes) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4855 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4856 mstate ms = (mstate) msp; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4857 if (!ok_magic(ms)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4858 USAGE_ERROR_ACTION(ms, ms); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4859 return 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4860 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4861 return internal_memalign(ms, alignment, bytes); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4862 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4863 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4864 void ** |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4865 mspace_independent_calloc(mspace msp, size_t n_elements, |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4866 size_t elem_size, void *chunks[]) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4867 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4868 size_t sz = elem_size; /* serves as 1-element array */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4869 mstate ms = (mstate) msp; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4870 if (!ok_magic(ms)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4871 USAGE_ERROR_ACTION(ms, ms); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4872 return 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4873 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4874 return ialloc(ms, n_elements, &sz, 3, chunks); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4875 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4876 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4877 void ** |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4878 mspace_independent_comalloc(mspace msp, size_t n_elements, |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4879 size_t sizes[], void *chunks[]) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4880 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4881 mstate ms = (mstate) msp; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4882 if (!ok_magic(ms)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4883 USAGE_ERROR_ACTION(ms, ms); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4884 return 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4885 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4886 return ialloc(ms, n_elements, sizes, 0, chunks); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4887 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4888 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4889 int |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4890 mspace_trim(mspace msp, size_t pad) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4891 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4892 int result = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4893 mstate ms = (mstate) msp; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4894 if (ok_magic(ms)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4895 if (!PREACTION(ms)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4896 result = sys_trim(ms, pad); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4897 POSTACTION(ms); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4898 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4899 } else { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4900 USAGE_ERROR_ACTION(ms, ms); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4901 } |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4902 return result; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4903 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4904 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4905 void |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4906 mspace_malloc_stats(mspace msp) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4907 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4908 mstate ms = (mstate) msp; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4909 if (ok_magic(ms)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4910 internal_malloc_stats(ms); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4911 } else { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4912 USAGE_ERROR_ACTION(ms, ms); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4913 } |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4914 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4915 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4916 size_t |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4917 mspace_footprint(mspace msp) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4918 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4919 size_t result; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4920 mstate ms = (mstate) msp; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4921 if (ok_magic(ms)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4922 result = ms->footprint; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4923 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4924 USAGE_ERROR_ACTION(ms, ms); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4925 return result; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4926 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4927 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4928 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4929 size_t |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4930 mspace_max_footprint(mspace msp) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4931 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4932 size_t result; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4933 mstate ms = (mstate) msp; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4934 if (ok_magic(ms)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4935 result = ms->max_footprint; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4936 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4937 USAGE_ERROR_ACTION(ms, ms); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4938 return result; |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4939 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4940 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4941 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4942 #if !NO_MALLINFO |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4943 struct mallinfo |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4944 mspace_mallinfo(mspace msp) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4945 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4946 mstate ms = (mstate) msp; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4947 if (!ok_magic(ms)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4948 USAGE_ERROR_ACTION(ms, ms); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4949 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4950 return internal_mallinfo(ms); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4951 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4952 #endif /* NO_MALLINFO */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4953 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4954 int |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4955 mspace_mallopt(int param_number, int value) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4956 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1465
diff
changeset
|
4957 return change_mparam(param_number, value); |
|
1330
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4958 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4959 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4960 #endif /* MSPACES */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4961 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4962 /* -------------------- Alternative MORECORE functions ------------------- */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4963 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4964 /* |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4965 Guidelines for creating a custom version of MORECORE: |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4966 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4967 * For best performance, MORECORE should allocate in multiples of pagesize. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4968 * MORECORE may allocate more memory than requested. (Or even less, |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4969 but this will usually result in a malloc failure.) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4970 * MORECORE must not allocate memory when given argument zero, but |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4971 instead return one past the end address of memory from previous |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4972 nonzero call. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4973 * For best performance, consecutive calls to MORECORE with positive |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4974 arguments should return increasing addresses, indicating that |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4975 space has been contiguously extended. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4976 * Even though consecutive calls to MORECORE need not return contiguous |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4977 addresses, it must be OK for malloc'ed chunks to span multiple |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4978 regions in those cases where they do happen to be contiguous. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4979 * MORECORE need not handle negative arguments -- it may instead |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4980 just return MFAIL when given negative arguments. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4981 Negative arguments are always multiples of pagesize. MORECORE |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4982 must not misinterpret negative args as large positive unsigned |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4983 args. You can suppress all such calls from even occurring by defining |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4984 MORECORE_CANNOT_TRIM, |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4985 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4986 As an example alternative MORECORE, here is a custom allocator |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4987 kindly contributed for pre-OSX macOS. It uses virtually but not |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4988 necessarily physically contiguous non-paged memory (locked in, |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4989 present and won't get swapped out). You can use it by uncommenting |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4990 this section, adding some #includes, and setting up the appropriate |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4991 defines above: |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4992 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4993 #define MORECORE osMoreCore |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4994 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4995 There is also a shutdown routine that should somehow be called for |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4996 cleanup upon program exit. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4997 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4998 #define MAX_POOL_ENTRIES 100 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
4999 #define MINIMUM_MORECORE_SIZE (64 * 1024U) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5000 static int next_os_pool; |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5001 void *our_os_pools[MAX_POOL_ENTRIES]; |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5002 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5003 void *osMoreCore(int size) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5004 { |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5005 void *ptr = 0; |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5006 static void *sbrk_top = 0; |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5007 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5008 if (size > 0) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5009 { |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5010 if (size < MINIMUM_MORECORE_SIZE) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5011 size = MINIMUM_MORECORE_SIZE; |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5012 if (CurrentExecutionLevel() == kTaskLevel) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5013 ptr = PoolAllocateResident(size + RM_PAGE_SIZE, 0); |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5014 if (ptr == 0) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5015 { |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5016 return (void *) MFAIL; |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5017 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5018 // save ptrs so they can be freed during cleanup |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5019 our_os_pools[next_os_pool] = ptr; |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5020 next_os_pool++; |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5021 ptr = (void *) ((((size_t) ptr) + RM_PAGE_MASK) & ~RM_PAGE_MASK); |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5022 sbrk_top = (char *) ptr + size; |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5023 return ptr; |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5024 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5025 else if (size < 0) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5026 { |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5027 // we don't currently support shrink behavior |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5028 return (void *) MFAIL; |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5029 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5030 else |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5031 { |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5032 return sbrk_top; |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5033 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5034 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5035 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5036 // cleanup any allocated memory pools |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5037 // called as last thing before shutting down driver |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5038 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5039 void osCleanupMem(void) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5040 { |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5041 void **ptr; |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5042 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5043 for (ptr = our_os_pools; ptr < &our_os_pools[MAX_POOL_ENTRIES]; ptr++) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5044 if (*ptr) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5045 { |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5046 PoolDeallocate(*ptr); |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5047 *ptr = 0; |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5048 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5049 } |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5050 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5051 */ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5052 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5053 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5054 /* ----------------------------------------------------------------------- |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5055 History: |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5056 V2.8.3 Thu Sep 22 11:16:32 2005 Doug Lea (dl at gee) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5057 * Add max_footprint functions |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5058 * Ensure all appropriate literals are size_t |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5059 * Fix conditional compilation problem for some #define settings |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5060 * Avoid concatenating segments with the one provided |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5061 in create_mspace_with_base |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5062 * Rename some variables to avoid compiler shadowing warnings |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5063 * Use explicit lock initialization. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5064 * Better handling of sbrk interference. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5065 * Simplify and fix segment insertion, trimming and mspace_destroy |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5066 * Reinstate REALLOC_ZERO_BYTES_FREES option from 2.7.x |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5067 * Thanks especially to Dennis Flanagan for help on these. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5068 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5069 V2.8.2 Sun Jun 12 16:01:10 2005 Doug Lea (dl at gee) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5070 * Fix memalign brace error. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5071 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5072 V2.8.1 Wed Jun 8 16:11:46 2005 Doug Lea (dl at gee) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5073 * Fix improper #endif nesting in C++ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5074 * Add explicit casts needed for C++ |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5075 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5076 V2.8.0 Mon May 30 14:09:02 2005 Doug Lea (dl at gee) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5077 * Use trees for large bins |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5078 * Support mspaces |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5079 * Use segments to unify sbrk-based and mmap-based system allocation, |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5080 removing need for emulation on most platforms without sbrk. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5081 * Default safety checks |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5082 * Optional footer checks. Thanks to William Robertson for the idea. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5083 * Internal code refactoring |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5084 * Incorporate suggestions and platform-specific changes. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5085 Thanks to Dennis Flanagan, Colin Plumb, Niall Douglas, |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5086 Aaron Bachmann, Emery Berger, and others. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5087 * Speed up non-fastbin processing enough to remove fastbins. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5088 * Remove useless cfree() to avoid conflicts with other apps. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5089 * Remove internal memcpy, memset. Compilers handle builtins better. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5090 * Remove some options that no one ever used and rename others. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5091 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5092 V2.7.2 Sat Aug 17 09:07:30 2002 Doug Lea (dl at gee) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5093 * Fix malloc_state bitmap array misdeclaration |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5094 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5095 V2.7.1 Thu Jul 25 10:58:03 2002 Doug Lea (dl at gee) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5096 * Allow tuning of FIRST_SORTED_BIN_SIZE |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5097 * Use PTR_UINT as type for all ptr->int casts. Thanks to John Belmonte. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5098 * Better detection and support for non-contiguousness of MORECORE. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5099 Thanks to Andreas Mueller, Conal Walsh, and Wolfram Gloger |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5100 * Bypass most of malloc if no frees. Thanks To Emery Berger. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5101 * Fix freeing of old top non-contiguous chunk im sysmalloc. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5102 * Raised default trim and map thresholds to 256K. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5103 * Fix mmap-related #defines. Thanks to Lubos Lunak. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5104 * Fix copy macros; added LACKS_FCNTL_H. Thanks to Neal Walfield. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5105 * Branch-free bin calculation |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5106 * Default trim and mmap thresholds now 256K. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5107 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5108 V2.7.0 Sun Mar 11 14:14:06 2001 Doug Lea (dl at gee) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5109 * Introduce independent_comalloc and independent_calloc. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5110 Thanks to Michael Pachos for motivation and help. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5111 * Make optional .h file available |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5112 * Allow > 2GB requests on 32bit systems. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5113 * new WIN32 sbrk, mmap, munmap, lock code from <Walter@GeNeSys-e.de>. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5114 Thanks also to Andreas Mueller <a.mueller at paradatec.de>, |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5115 and Anonymous. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5116 * Allow override of MALLOC_ALIGNMENT (Thanks to Ruud Waij for |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5117 helping test this.) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5118 * memalign: check alignment arg |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5119 * realloc: don't try to shift chunks backwards, since this |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5120 leads to more fragmentation in some programs and doesn't |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5121 seem to help in any others. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5122 * Collect all cases in malloc requiring system memory into sysmalloc |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5123 * Use mmap as backup to sbrk |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5124 * Place all internal state in malloc_state |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5125 * Introduce fastbins (although similar to 2.5.1) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5126 * Many minor tunings and cosmetic improvements |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5127 * Introduce USE_PUBLIC_MALLOC_WRAPPERS, USE_MALLOC_LOCK |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5128 * Introduce MALLOC_FAILURE_ACTION, MORECORE_CONTIGUOUS |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5129 Thanks to Tony E. Bennett <tbennett@nvidia.com> and others. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5130 * Include errno.h to support default failure action. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5131 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5132 V2.6.6 Sun Dec 5 07:42:19 1999 Doug Lea (dl at gee) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5133 * return null for negative arguments |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5134 * Added Several WIN32 cleanups from Martin C. Fong <mcfong at yahoo.com> |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5135 * Add 'LACKS_SYS_PARAM_H' for those systems without 'sys/param.h' |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5136 (e.g. WIN32 platforms) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5137 * Cleanup header file inclusion for WIN32 platforms |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5138 * Cleanup code to avoid Microsoft Visual C++ compiler complaints |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5139 * Add 'USE_DL_PREFIX' to quickly allow co-existence with existing |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5140 memory allocation routines |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5141 * Set 'malloc_getpagesize' for WIN32 platforms (needs more work) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5142 * Use 'assert' rather than 'ASSERT' in WIN32 code to conform to |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5143 usage of 'assert' in non-WIN32 code |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5144 * Improve WIN32 'sbrk()' emulation's 'findRegion()' routine to |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5145 avoid infinite loop |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5146 * Always call 'fREe()' rather than 'free()' |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5147 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5148 V2.6.5 Wed Jun 17 15:57:31 1998 Doug Lea (dl at gee) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5149 * Fixed ordering problem with boundary-stamping |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5150 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5151 V2.6.3 Sun May 19 08:17:58 1996 Doug Lea (dl at gee) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5152 * Added pvalloc, as recommended by H.J. Liu |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5153 * Added 64bit pointer support mainly from Wolfram Gloger |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5154 * Added anonymously donated WIN32 sbrk emulation |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5155 * Malloc, calloc, getpagesize: add optimizations from Raymond Nijssen |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5156 * malloc_extend_top: fix mask error that caused wastage after |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5157 foreign sbrks |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5158 * Add linux mremap support code from HJ Liu |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5159 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5160 V2.6.2 Tue Dec 5 06:52:55 1995 Doug Lea (dl at gee) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5161 * Integrated most documentation with the code. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5162 * Add support for mmap, with help from |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5163 Wolfram Gloger (Gloger@lrz.uni-muenchen.de). |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5164 * Use last_remainder in more cases. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5165 * Pack bins using idea from colin@nyx10.cs.du.edu |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5166 * Use ordered bins instead of best-fit threshhold |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5167 * Eliminate block-local decls to simplify tracing and debugging. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5168 * Support another case of realloc via move into top |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5169 * Fix error occuring when initial sbrk_base not word-aligned. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5170 * Rely on page size for units instead of SBRK_UNIT to |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5171 avoid surprises about sbrk alignment conventions. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5172 * Add mallinfo, mallopt. Thanks to Raymond Nijssen |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5173 (raymond@es.ele.tue.nl) for the suggestion. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5174 * Add `pad' argument to malloc_trim and top_pad mallopt parameter. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5175 * More precautions for cases where other routines call sbrk, |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5176 courtesy of Wolfram Gloger (Gloger@lrz.uni-muenchen.de). |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5177 * Added macros etc., allowing use in linux libc from |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5178 H.J. Lu (hjl@gnu.ai.mit.edu) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5179 * Inverted this history list |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5180 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5181 V2.6.1 Sat Dec 2 14:10:57 1995 Doug Lea (dl at gee) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5182 * Re-tuned and fixed to behave more nicely with V2.6.0 changes. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5183 * Removed all preallocation code since under current scheme |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5184 the work required to undo bad preallocations exceeds |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5185 the work saved in good cases for most test programs. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5186 * No longer use return list or unconsolidated bins since |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5187 no scheme using them consistently outperforms those that don't |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5188 given above changes. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5189 * Use best fit for very large chunks to prevent some worst-cases. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5190 * Added some support for debugging |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5191 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5192 V2.6.0 Sat Nov 4 07:05:23 1995 Doug Lea (dl at gee) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5193 * Removed footers when chunks are in use. Thanks to |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5194 Paul Wilson (wilson@cs.texas.edu) for the suggestion. |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5195 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5196 V2.5.4 Wed Nov 1 07:54:51 1995 Doug Lea (dl at gee) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5197 * Added malloc_trim, with help from Wolfram Gloger |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5198 (wmglo@Dent.MED.Uni-Muenchen.DE). |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5199 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5200 V2.5.3 Tue Apr 26 10:16:01 1994 Doug Lea (dl at g) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5201 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5202 V2.5.2 Tue Apr 5 16:20:40 1994 Doug Lea (dl at g) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5203 * realloc: try to expand in both directions |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5204 * malloc: swap order of clean-bin strategy; |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5205 * realloc: only conditionally expand backwards |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5206 * Try not to scavenge used bins |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5207 * Use bin counts as a guide to preallocation |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5208 * Occasionally bin return list chunks in first scan |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5209 * Add a few optimizations from colin@nyx10.cs.du.edu |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5210 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5211 V2.5.1 Sat Aug 14 15:40:43 1993 Doug Lea (dl at g) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5212 * faster bin computation & slightly different binning |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5213 * merged all consolidations to one part of malloc proper |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5214 (eliminating old malloc_find_space & malloc_clean_bin) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5215 * Scan 2 returns chunks (not just 1) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5216 * Propagate failure in realloc if malloc returns 0 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5217 * Add stuff to allow compilation on non-ANSI compilers |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5218 from kpv@research.att.com |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5219 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5220 V2.5 Sat Aug 7 07:41:59 1993 Doug Lea (dl at g.oswego.edu) |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5221 * removed potential for odd address access in prev_chunk |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5222 * removed dependency on getpagesize.h |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5223 * misc cosmetics and a bit more internal documentation |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5224 * anticosmetics: mangled names in macros to evade debugger strangeness |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
5225 * tested on sparc, hp-700, dec-mips, rs6000 |
|
450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
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5226 with gcc & native cc (hp, dec only) allowing |
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450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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5227 Detlefs & Zorn comparison study (in SIGPLAN Notices.) |
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450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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5228 |
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450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
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5229 Trial version Fri Aug 28 13:14:29 1992 Doug Lea (dl at g.oswego.edu) |
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450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
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5230 * Based loosely on libg++-1.2X malloc. (It retains some of the overall |
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450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
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5231 structure of old version, but most details differ.) |
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450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
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5232 |
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450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
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5233 */ |
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450721ad5436
It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
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5234 |
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1333
39b0d60d3f50
*** empty log message ***
Sam Lantinga <slouken@libsdl.org>
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1330
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5235 #endif /* !HAVE_MALLOC */ |
| 2203 | 5236 |
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1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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5237 /* vi: set ts=4 sw=4 expandtab: */ |