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annotate src/SDL_loadso.c @ 1077:f122afdfa025

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The Darwin/MacOSX joystick code is largely copied from the HID Utilities package...make the symbols defined by HID Utilities static inside SDL so that an app can link against their own copy of this package without symbol clash.
author Ryan C. Gordon <icculus@icculus.org>
date Wed, 15 Jun 2005 23:41:57 +0000
parents 0c3e00cc9580
children cf6133247d34
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2004 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 loaderror = NULL;
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102 break;
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103 case cfragNoLibraryErr:
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104 loaderror = "Library not found";
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105 break;
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106 case cfragUnresolvedErr:
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107 loaderror = "Unabled to resolve symbols";
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108 break;
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109 case cfragNoPrivateMemErr:
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110 case cfragNoClientMemErr:
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111 loaderror = "Out of memory";
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112 break;
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113 default:
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114 loaderror = "Unknown Code Fragment Manager error";
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115 break;
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116 }
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117 if ( loaderror == NULL ) {
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118 handle = (void *)(library_id);
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119 }
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120 #elif defined(__MINT__) && defined(ENABLE_LDG)
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121 /* * */
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122 handle = (void *)ldg_open((char *)sofile, ldg_global);
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123 #endif /* system type */
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124
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125 if ( handle == NULL ) {
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126 SDL_SetError("Failed loading %s: %s", sofile, loaderror);
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127 }
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128 return(handle);
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129 }
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130
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131 void *SDL_LoadFunction(void *handle, const char *name)
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132 {
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133 void *symbol = NULL;
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134 const char *loaderror = "SDL_LoadFunction not implemented";
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135 #if defined(USE_DLOPEN)
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136 /* * */
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137 symbol = dlsym(handle, name);
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138 if ( symbol == NULL ) {
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139 loaderror = (char *)dlerror();
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140 }
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141 #elif defined(WIN32)
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142 /* * */
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143 char errbuf[512];
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144
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145 symbol = (void *)GetProcAddress((HMODULE)handle, name);
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146 if ( symbol == NULL ) {
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147 FormatMessage((FORMAT_MESSAGE_IGNORE_INSERTS |
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148 FORMAT_MESSAGE_FROM_SYSTEM),
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149 NULL, GetLastError(),
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150 MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
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151 errbuf, SDL_TABLESIZE(errbuf), NULL);
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152 loaderror = errbuf;
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153 }
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154 #elif defined(__BEOS__)
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155 /* * */
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156 image_id library_id = (image_id)handle;
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157 if ( get_image_symbol(library_id,
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158 name, B_SYMBOL_TYPE_TEXT, &symbol) != B_NO_ERROR ) {
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159 loaderror = "Symbol not found";
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160 }
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161 #elif defined(macintosh)
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162 /* * */
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163 CFragSymbolClass class;
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164 CFragConnectionID library_id = (CFragConnectionID)handle;
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165 char pname[512];
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166
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167 strncpy(pname, name, SDL_TABLESIZE(pname));
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168 pname[SDL_TABLESIZE(pname)-1] = '\0';
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169 if ( FindSymbol(library_id, C2PStr(pname),
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170 (char **)&symbol, &class) != noErr ) {
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171 loaderror = "Symbol not found";
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172 }
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173 #elif defined(__MINT__) && defined(ENABLE_LDG)
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174 /* * */
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175 symbol = (void *)ldg_find((char *)name, (LDG *)handle);
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176 #endif /* system type */
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177
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178 if ( symbol == NULL ) {
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179 SDL_SetError("Failed loading %s: %s", name, loaderror);
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180 }
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181 return(symbol);
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182 }
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183
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184 void SDL_UnloadObject(void *handle)
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185 {
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186 #if defined(__BEOS__)
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187 image_id library_id;
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188 #elif defined(macintosh)
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189 CFragConnectionID library_id;
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190 #endif
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191 if ( handle == NULL ) {
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192 return;
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193 }
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194 #if defined(USE_DLOPEN)
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195 /* * */
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196 dlclose(handle);
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197 #elif defined(WIN32)
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198 /* * */
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199 FreeLibrary((HMODULE)handle);
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200 #elif defined(__BEOS__)
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201 /* * */
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202 library_id = (image_id)handle;
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203 unload_add_on(library_id);
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204 #elif defined(macintosh)
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205 /* * */
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206 library_id = (CFragConnectionID)handle;
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207 CloseConnection(&library_id);
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208 #elif defined(__MINT__) && defined(ENABLE_LDG)
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209 /* * */
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210 ldg_close((LDG *)handle, ldg_global);
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211 #endif /* system type */
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212 }