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annotate src/SDL_loadso.c @ 721:ab0656314eef

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Date: Thu, 18 Sep 2003 14:24:35 -0400 From: Scott Watson Subject: [SDL] Improper Windows message routine calling If this hasn't been caught yet, there's an improper method of calling a user's window message routine in the various SDL_xxevents.c files. Calling it improperly can cause a crash under at least XP.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 21 Sep 2003 18:40:51 +0000
parents d0d50f2b044c
children b8d311d90021
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 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 Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 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 Library 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 Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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
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23 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
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28 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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29 /* System dependent library loading routines */
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30
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31 #include <stdio.h>
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32 #if defined(USE_DLOPEN)
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33 # include <dlfcn.h>
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34 #elif defined(WIN32)
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35 # include <windows.h>
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36 #elif defined(__BEOS__)
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37 # include <be/kernel/image.h>
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38 #elif defined(macintosh)
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39 # include <string.h>
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40 # include <Strings.h>
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41 # include <CodeFragments.h>
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42 # include <Errors.h>
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43 #elif defined(__MINT__) && defined(ENABLE_LDG)
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44 # include <gem.h>
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45 # include <ldg.h>
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46 #else
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47 /*#error Unsupported dynamic link environment*/
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48 #endif /* system type */
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49
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50 #include "SDL_types.h"
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51 #include "SDL_error.h"
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52 #include "SDL_loadso.h"
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53
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54 void *SDL_LoadObject(const char *sofile)
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55 {
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56 void *handle = NULL;
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57 const char *loaderror = "SDL_LoadObject() not implemented";
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58 #if defined(USE_DLOPEN)
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59 /* * */
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60 handle = dlopen(sofile, RTLD_NOW);
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61 loaderror = (char *)dlerror();
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62 #elif defined(WIN32)
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63 /* * */
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64 char errbuf[512];
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65
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66 handle = (void *)LoadLibrary(sofile);
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67
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68 /* Generate an error message if all loads failed */
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69 if ( handle == NULL ) {
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70 FormatMessage((FORMAT_MESSAGE_IGNORE_INSERTS |
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71 FORMAT_MESSAGE_FROM_SYSTEM),
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72 NULL, GetLastError(),
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73 MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
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74 errbuf, SDL_TABLESIZE(errbuf), NULL);
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75 loaderror = errbuf;
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76 }
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77 #elif defined(__BEOS__)
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78 /* * */
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79 image_id library_id;
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80
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81 library_id = load_add_on(sofile);
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82 if ( library_id == B_ERROR ) {
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83 loaderror = "BeOS error";
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84 } else {
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85 handle = (void *)(library_id);
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86 }
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87 #elif defined(macintosh)
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88 /* * */
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89 CFragConnectionID library_id;
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90 Ptr mainAddr;
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91 Str255 errName;
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92 OSErr error;
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93 char psofile[512];
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94
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95 strncpy(psofile, sofile, SDL_TABLESIZE(psofile));
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96 psofile[SDL_TABLESIZE(psofile)-1] = '\0';
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97 error = GetSharedLibrary(C2PStr(psofile), kCompiledCFragArch,
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98 kLoadCFrag, &library_id, &mainAddr, errName);
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99 switch (error) {
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100 case noErr:
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101 break;
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102 case cfragNoLibraryErr:
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103 loaderror = "Library not found";
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104 break;
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105 case cfragUnresolvedErr:
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106 loaderror = "Unabled to resolve symbols";
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107 break;
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108 case cfragNoPrivateMemErr:
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109 case cfragNoClientMemErr:
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110 loaderror = "Out of memory";
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111 break;
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112 default:
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113 loaderror = "Unknown Code Fragment Manager error";
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114 break;
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115 }
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116 if ( loaderror == NULL ) {
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117 handle = (void *)(library_id);
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118 }
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119 #elif defined(__MINT__) && defined(ENABLE_LDG)
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120 /* * */
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121 handle = (void *)ldg_open((char *)sofile, ldg_global);
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122 #endif /* system type */
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123
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124 if ( handle == NULL ) {
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125 SDL_SetError("Failed loading %s: %s", sofile, loaderror);
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126 }
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127 return(handle);
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128 }
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129
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130 void *SDL_LoadFunction(void *handle, const char *name)
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131 {
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132 void *symbol = NULL;
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133 const char *loaderror = "SDL_LoadFunction not implemented";
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134 #if defined(USE_DLOPEN)
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135 /* * */
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136 symbol = dlsym(handle, name);
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137 if ( symbol == NULL ) {
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138 loaderror = (char *)dlerror();
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139 }
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140 #elif defined(WIN32)
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141 /* * */
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142 char errbuf[512];
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143
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144 symbol = (void *)GetProcAddress((HMODULE)handle, name);
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145 if ( symbol == NULL ) {
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146 FormatMessage((FORMAT_MESSAGE_IGNORE_INSERTS |
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147 FORMAT_MESSAGE_FROM_SYSTEM),
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148 NULL, GetLastError(),
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149 MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
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150 errbuf, SDL_TABLESIZE(errbuf), NULL);
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151 loaderror = errbuf;
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152 }
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153 #elif defined(__BEOS__)
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154 /* * */
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155 image_id library_id = (image_id)handle;
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156 if ( get_image_symbol(library_id,
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157 name, B_SYMBOL_TYPE_TEXT, &symbol) != B_NO_ERROR ) {
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158 loaderror = "Symbol not found";
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159 }
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160 #elif defined(macintosh)
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161 /* * */
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162 CFragSymbolClass class;
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163 CFragConnectionID library_id = (CFragConnectionID)handle;
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164 char pname[512];
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165
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166 strncpy(pname, name, SDL_TABLESIZE(pname));
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167 pname[SDL_TABLESIZE(pname)-1] = '\0';
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168 if ( FindSymbol(library_id, C2PStr(pname),
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169 (char **)&symbol, &class) != noErr ) {
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170 loaderror = "Symbol not found";
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171 }
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172 #elif defined(__MINT__) && defined(ENABLE_LDG)
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173 /* * */
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174 symbol = (void *)ldg_find((char *)name, (LDG *)handle);
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175 #endif /* system type */
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176
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177 if ( symbol == NULL ) {
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178 SDL_SetError("Failed loading %s: %s", name, loaderror);
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179 }
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180 return(symbol);
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181 }
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182
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183 void SDL_UnloadObject(void *handle)
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184 {
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185 #if defined(__BEOS__)
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186 image_id library_id;
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187 #elif defined(macintosh)
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188 CFragConnectionID library_id;
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189 #endif
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190 if ( handle == NULL ) {
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191 return;
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192 }
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193 #if defined(USE_DLOPEN)
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194 /* * */
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195 dlclose(handle);
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196 #elif defined(WIN32)
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197 /* * */
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198 FreeLibrary((HMODULE)handle);
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199 #elif defined(__BEOS__)
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200 /* * */
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201 library_id = (image_id)handle;
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202 unload_add_on(library_id);
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203 #elif defined(macintosh)
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204 /* * */
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205 library_id = (CFragConnectionID)handle;
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206 CloseConnection(&library_id);
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207 #elif defined(__MINT__) && defined(ENABLE_LDG)
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208 /* * */
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209 ldg_close((LDG *)handle, ldg_global);
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210 #endif /* system type */
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211 }