Mercurial > sdl-ios-xcode
annotate src/thread/nds/SDL_sysmutex.c @ 4426:1bceff8f008f
Fixed bug #943
Ozkan Sezer 2010-02-06 12:31:06 PST
Hi:
Here are some small fixes for compiling SDL against mingw-w64.
(see http://mingw-w64.sourceforge.net/ . Despite the name, it
supports both win32 and win64.)
src/audio/windx5/directx.h and src/video/windx5/directx.h (both
SDL-1.2 and SDL-1.3.) I get compilation errors about some union
not having a member named u1 and alike, because of other system
headers being included before this one and them already defining
DUMMYUNIONNAME and stuff. This header probably assumes that those
stuff are defined in windef.h, but mingw-w64 headers define them
in _mingw.h. Easily fixed by moving NONAMELESSUNION definition to
the top of the file.
src/thread/win32/SDL_systhread.c (both SDL-1.2 and SDL-1.3.) :
The __GNUC__ case for pfnSDL_CurrentBeginThread is 32-bit centric
because _beginthreadex returns uintptr_t, not unsigned long which
is 32 bits in win64. Changing the return type to uintptr_t fixes
it.
video/SDL_blit.h (and configure.in) (SDL-1.3-only) : MinGW-w64
uses msvcrt version of _aligned_malloc and _aligned_free and
they are defined in intrin.h (similar to VC). Adding proper
ifdefs fixes it. (Notes about macros to check: __MINGW32__ is
defined for both mingw.org and for mingw-w64 for both win32 and
win64, __MINGW64__ is only defined for _WIN64, so __MINGW64__
can't be used to detect mingw-w64: including _mingw.h and then
checking for __MINGW64_VERSION_MAJOR does the trick.)
SDL_win32video.h (SDL-1.3-only) : Tweaked the VINWER definition
and location in order to avoid multiple redefinition warnings.
Hope these are useful. Thanks.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Wed, 10 Mar 2010 15:02:58 +0000 |
parents | f7b03b6838cb |
children | b530ef003506 |
rev | line source |
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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 |
3697 | 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 |
3697 | 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 |
3697 | 13 Lesser General Public License for more details. |
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14 |
3697 | 15 You should have received a copy of the GNU Lesser General Public |
16 License along with this library; if not, write to the Free Software | |
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 |
3697 | 20 slouken@libsdl.org |
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21 */ |
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22 |
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23 #ifdef SAVE_RCSID |
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24 static char rcsid = |
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25 "@(#) $Id: SDL_sysmutex.c,v 1.2 2001/04/26 16:50:18 hercules Exp $"; |
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26 #endif |
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27 |
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28 /* An implementation of mutexes using semaphores */ |
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29 |
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30 #include <stdio.h> |
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31 #include <stdlib.h> |
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32 |
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33 #include "SDL_error.h" |
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34 #include "SDL_thread.h" |
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35 #include "SDL_systhread_c.h" |
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36 |
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37 |
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38 struct SDL_mutex |
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39 { |
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40 int recursive; |
3578 | 41 SDL_threadID owner; |
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42 SDL_sem *sem; |
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43 }; |
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44 |
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45 /* Create a mutex */ |
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46 SDL_mutex * |
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47 SDL_CreateMutex(void) |
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48 { |
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49 SDL_mutex *mutex; |
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50 |
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51 /* Allocate mutex memory */ |
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52 mutex = (SDL_mutex *) malloc(sizeof(*mutex)); |
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53 if (mutex) { |
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54 /* Create the mutex semaphore, with initial value 1 */ |
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55 mutex->sem = SDL_CreateSemaphore(1); |
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56 mutex->recursive = 0; |
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57 mutex->owner = 0; |
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58 if (!mutex->sem) { |
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59 free(mutex); |
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60 mutex = NULL; |
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61 } |
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62 } else { |
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63 SDL_OutOfMemory(); |
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64 } |
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65 return mutex; |
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66 } |
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67 |
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68 /* Free the mutex */ |
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69 void |
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70 SDL_DestroyMutex(SDL_mutex * mutex) |
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71 { |
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72 if (mutex) { |
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73 if (mutex->sem) { |
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74 SDL_DestroySemaphore(mutex->sem); |
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75 } |
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76 free(mutex); |
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77 } |
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78 } |
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79 |
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80 /* Lock the semaphore */ |
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81 int |
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82 SDL_mutexP(SDL_mutex * mutex) |
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83 { |
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84 #ifdef DISABLE_THREADS |
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85 return 0; |
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86 #else |
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88 |
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89 if (mutex == NULL) { |
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90 SDL_SetError("Passed a NULL mutex"); |
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91 return -1; |
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92 } |
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93 |
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94 this_thread = SDL_ThreadID(); |
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95 if (mutex->owner == this_thread) { |
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96 ++mutex->recursive; |
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97 } else { |
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98 /* The order of operations is important. |
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99 We set the locking thread id after we obtain the lock |
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100 so unlocks from other threads will fail. |
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101 */ |
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102 SDL_SemWait(mutex->sem); |
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103 mutex->owner = this_thread; |
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104 mutex->recursive = 0; |
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105 } |
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106 |
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107 return 0; |
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108 #endif /* DISABLE_THREADS */ |
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109 } |
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110 |
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111 /* Unlock the mutex */ |
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112 int |
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113 SDL_mutexV(SDL_mutex * mutex) |
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114 { |
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115 #ifdef DISABLE_THREADS |
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116 return 0; |
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117 #else |
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118 if (mutex == NULL) { |
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119 SDL_SetError("Passed a NULL mutex"); |
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120 return -1; |
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121 } |
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122 |
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123 /* If we don't own the mutex, we can't unlock it */ |
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124 if (SDL_ThreadID() != mutex->owner) { |
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125 SDL_SetError("mutex not owned by this thread"); |
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126 return -1; |
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127 } |
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128 |
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129 if (mutex->recursive) { |
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130 --mutex->recursive; |
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131 } else { |
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132 /* The order of operations is important. |
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133 First reset the owner so another thread doesn't lock |
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134 the mutex and set the ownership before we reset it, |
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135 then release the lock semaphore. |
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136 */ |
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137 mutex->owner = 0; |
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138 SDL_SemPost(mutex->sem); |
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139 } |
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140 return 0; |
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141 #endif /* DISABLE_THREADS */ |
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142 } |