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annotate src/SDL.c @ 2674:f1d07ba2e275 gsoc2008_nds

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Started adding framework for Touchscreen API, based on and (consistent with) the existing Joystick API.
author Darren Alton <dalton@stevens.edu>
date Mon, 23 Jun 2008 11:55:26 +0000
parents 8f1ab2f7c722
children 3895761db26a
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 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 /* Initialization code for SDL */
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25
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26 #include "SDL.h"
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27 #include "SDL_fatal.h"
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28 #if !SDL_VIDEO_DISABLED
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29 #include "video/SDL_leaks.h"
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30 #endif
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31
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32 #if SDL_THREAD_PTH
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33 #include <pth.h>
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34 #endif
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35
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36 /* Initialization/Cleanup routines */
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37 #if !SDL_JOYSTICK_DISABLED
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38 extern int SDL_JoystickInit(void);
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39 extern void SDL_JoystickQuit(void);
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40 #endif
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41 #if !SDL_TOUCHSCREEN_DISABLED
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42 extern int SDL_TouchscreenInit(void);
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43 extern void SDL_TouchscreenQuit(void);
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44 #endif
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45 #if !SDL_CDROM_DISABLED
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46 extern int SDL_CDROMInit(void);
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47 extern void SDL_CDROMQuit(void);
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48 #endif
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49 #if !SDL_TIMERS_DISABLED
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50 extern void SDL_StartTicks(void);
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51 extern int SDL_TimerInit(void);
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52 extern void SDL_TimerQuit(void);
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53 #endif
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54
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55 /* The initialized subsystems */
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56 static Uint32 SDL_initialized = 0;
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57 static Uint32 ticks_started = 0;
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58
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59 #ifdef CHECK_LEAKS
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60 int surfaces_allocated = 0;
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61 #endif
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62
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63 int
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64 SDL_InitSubSystem(Uint32 flags)
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65 {
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66 #if !SDL_VIDEO_DISABLED
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67 /* Initialize the video/event subsystem */
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68 if ((flags & SDL_INIT_VIDEO) && !(SDL_initialized & SDL_INIT_VIDEO)) {
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69 if (SDL_VideoInit(NULL, (flags & SDL_INIT_EVENTTHREAD)) < 0) {
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70 return (-1);
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71 }
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72 SDL_initialized |= SDL_INIT_VIDEO;
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73 }
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74 #else
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75 if (flags & SDL_INIT_VIDEO) {
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76 SDL_SetError("SDL not built with video support");
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77 return (-1);
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78 }
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79 #endif
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80
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81 #if !SDL_AUDIO_DISABLED
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82 /* Initialize the audio subsystem */
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83 if ((flags & SDL_INIT_AUDIO) && !(SDL_initialized & SDL_INIT_AUDIO)) {
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84 if (SDL_AudioInit(NULL) < 0) {
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85 return (-1);
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86 }
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87 SDL_initialized |= SDL_INIT_AUDIO;
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88 }
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89 #else
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90 if (flags & SDL_INIT_AUDIO) {
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91 SDL_SetError("SDL not built with audio support");
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92 return (-1);
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93 }
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94 #endif
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95
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96 #if !SDL_TIMERS_DISABLED
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97 /* Initialize the timer subsystem */
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98 if (!ticks_started) {
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99 SDL_StartTicks();
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100 ticks_started = 1;
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101 }
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102 if ((flags & SDL_INIT_TIMER) && !(SDL_initialized & SDL_INIT_TIMER)) {
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103 if (SDL_TimerInit() < 0) {
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104 return (-1);
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105 }
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106 SDL_initialized |= SDL_INIT_TIMER;
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107 }
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108 #else
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109 if (flags & SDL_INIT_TIMER) {
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110 SDL_SetError("SDL not built with timer support");
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111 return (-1);
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112 }
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113 #endif
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114
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115 #if !SDL_JOYSTICK_DISABLED
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116 /* Initialize the joystick subsystem */
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117 if ((flags & SDL_INIT_JOYSTICK) && !(SDL_initialized & SDL_INIT_JOYSTICK)) {
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118 if (SDL_JoystickInit() < 0) {
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119 return (-1);
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120 }
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121 SDL_initialized |= SDL_INIT_JOYSTICK;
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122 }
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123 #else
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124 if (flags & SDL_INIT_JOYSTICK) {
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125 SDL_SetError("SDL not built with joystick support");
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126 return (-1);
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127 }
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128 #endif
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129
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130 #if !SDL_TOUCHSCREEN_DISABLED
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131 /* Initialize the touchscreen subsystem */
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132 if ((flags & SDL_INIT_TOUCHSCREEN) && !(SDL_initialized & SDL_INIT_TOUCHSCREEN)) {
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133 if (SDL_TouchscreenInit() < 0) {
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134 return (-1);
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135 }
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136 SDL_initialized |= SDL_INIT_TOUCHSCREEN;
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137 }
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138 #else
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139 if (flags & SDL_INIT_TOUCHSCREEN) {
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140 SDL_SetError("SDL not built with touchscreen support");
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141 return (-1);
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142 }
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143 #endif
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144
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145 #if !SDL_CDROM_DISABLED
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146 /* Initialize the CD-ROM subsystem */
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147 if ((flags & SDL_INIT_CDROM) && !(SDL_initialized & SDL_INIT_CDROM)) {
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148 if (SDL_CDROMInit() < 0) {
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149 return (-1);
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150 }
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151 SDL_initialized |= SDL_INIT_CDROM;
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152 }
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153 #else
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154 if (flags & SDL_INIT_CDROM) {
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155 SDL_SetError("SDL not built with cdrom support");
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156 return (-1);
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157 }
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158 #endif
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159 return (0);
0
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160 }
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161
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162 int
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163 SDL_Init(Uint32 flags)
0
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164 {
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165 #if !SDL_THREADS_DISABLED && SDL_THREAD_PTH
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166 if (!pth_init()) {
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167 return -1;
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168 }
397
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169 #endif
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170
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171 /* Clear the error message */
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172 SDL_ClearError();
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173
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174 /* Initialize the desired subsystems */
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175 if (SDL_InitSubSystem(flags) < 0) {
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176 return (-1);
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177 }
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178
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179 /* Everything is initialized */
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180 if (!(flags & SDL_INIT_NOPARACHUTE)) {
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181 SDL_InstallParachute();
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182 }
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183 return (0);
0
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184 }
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185
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186 void
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187 SDL_QuitSubSystem(Uint32 flags)
0
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188 {
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189 /* Shut down requested initialized subsystems */
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190 #if !SDL_CDROM_DISABLED
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191 if ((flags & SDL_initialized & SDL_INIT_CDROM)) {
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192 SDL_CDROMQuit();
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193 SDL_initialized &= ~SDL_INIT_CDROM;
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194 }
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195 #endif
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196 #if !SDL_JOYSTICK_DISABLED
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197 if ((flags & SDL_initialized & SDL_INIT_JOYSTICK)) {
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198 SDL_JoystickQuit();
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199 SDL_initialized &= ~SDL_INIT_JOYSTICK;
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200 }
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201 #endif
2674
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202 #if !SDL_TOUCHSCREEN_DISABLED
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203 if ((flags & SDL_initialized & SDL_INIT_TOUCHSCREEN)) {
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204 SDL_TouchscreenQuit();
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205 SDL_initialized &= ~SDL_INIT_TOUCHSCREEN;
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206 }
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diff changeset
207 #endif
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208 #if !SDL_TIMERS_DISABLED
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209 if ((flags & SDL_initialized & SDL_INIT_TIMER)) {
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210 SDL_TimerQuit();
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211 SDL_initialized &= ~SDL_INIT_TIMER;
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212 }
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213 #endif
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214 #if !SDL_AUDIO_DISABLED
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215 if ((flags & SDL_initialized & SDL_INIT_AUDIO)) {
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216 SDL_AudioQuit();
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217 SDL_initialized &= ~SDL_INIT_AUDIO;
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218 }
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219 #endif
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220 #if !SDL_VIDEO_DISABLED
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221 if ((flags & SDL_initialized & SDL_INIT_VIDEO)) {
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222 SDL_VideoQuit();
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223 SDL_initialized &= ~SDL_INIT_VIDEO;
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224 }
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225 #endif
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226 }
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227
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228 Uint32
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229 SDL_WasInit(Uint32 flags)
0
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230 {
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231 if (!flags) {
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232 flags = SDL_INIT_EVERYTHING;
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233 }
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234 return (SDL_initialized & flags);
0
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235 }
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236
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237 void
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238 SDL_Quit(void)
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239 {
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240 /* Quit all subsystems */
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241 #ifdef DEBUG_BUILD
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242 printf("[SDL_Quit] : Enter! Calling QuitSubSystem()\n");
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243 fflush(stdout);
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244 #endif
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245 SDL_QuitSubSystem(SDL_INIT_EVERYTHING);
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246
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247 #ifdef CHECK_LEAKS
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248 #ifdef DEBUG_BUILD
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249 printf("[SDL_Quit] : CHECK_LEAKS\n");
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250 fflush(stdout);
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251 #endif
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252
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253 /* Print the number of surfaces not freed */
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254 if (surfaces_allocated != 0) {
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255 fprintf(stderr, "SDL Warning: %d SDL surfaces extant\n",
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256 surfaces_allocated);
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257 }
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258 #endif
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259 #ifdef DEBUG_BUILD
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260 printf("[SDL_Quit] : SDL_UninstallParachute()\n");
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261 fflush(stdout);
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262 #endif
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263
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264 /* Uninstall any parachute signal handlers */
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265 SDL_UninstallParachute();
397
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diff changeset
266
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267 #if !SDL_THREADS_DISABLED && SDL_THREAD_PTH
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268 pth_kill();
397
283d348cb624 Pth threading bug fix
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diff changeset
269 #endif
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270 #ifdef DEBUG_BUILD
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271 printf("[SDL_Quit] : Returning!\n");
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272 fflush(stdout);
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273 #endif
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274
0
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275 }
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276
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277 /* Get the library version number */
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278 void
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279 SDL_GetVersion(SDL_version * ver)
0
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280 {
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281 SDL_VERSION(ver);
0
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282 }
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283
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284 #if defined(__OS2__)
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285 /* Building for OS/2 */
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286 #ifdef __WATCOMC__
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287
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288 #define INCL_DOSERRORS
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289 #define INCL_DOSEXCEPTIONS
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290 #include <os2.h>
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291
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292 /* Exception handler to prevent the Audio thread hanging, making a zombie process! */
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293 ULONG _System
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294 SDL_Main_ExceptionHandler(PEXCEPTIONREPORTRECORD pERepRec,
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295 PEXCEPTIONREGISTRATIONRECORD pERegRec,
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296 PCONTEXTRECORD pCtxRec, PVOID p)
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297 {
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298 if (pERepRec->fHandlerFlags & EH_EXIT_UNWIND)
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299 return XCPT_CONTINUE_SEARCH;
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300 if (pERepRec->fHandlerFlags & EH_UNWINDING)
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301 return XCPT_CONTINUE_SEARCH;
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302 if (pERepRec->fHandlerFlags & EH_NESTED_CALL)
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303 return XCPT_CONTINUE_SEARCH;
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304
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305 /* Do cleanup at every fatal exception! */
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306 if (((pERepRec->ExceptionNum & XCPT_SEVERITY_CODE) ==
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307 XCPT_FATAL_EXCEPTION) && (pERepRec->ExceptionNum != XCPT_BREAKPOINT)
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308 && (pERepRec->ExceptionNum != XCPT_SINGLE_STEP)) {
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309 if (SDL_initialized & SDL_INIT_AUDIO) {
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310 /* This removes the zombie audio thread in case of emergency. */
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311 #ifdef DEBUG_BUILD
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312 printf
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313 ("[SDL_Main_ExceptionHandler] : Calling SDL_CloseAudio()!\n");
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314 #endif
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315 SDL_CloseAudio();
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316 }
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317 }
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318 return (XCPT_CONTINUE_SEARCH);
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319 }
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320
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321
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322 EXCEPTIONREGISTRATIONRECORD SDL_Main_xcpthand =
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323 { 0, SDL_Main_ExceptionHandler };
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324
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325 /* The main DLL entry for DLL Initialization and Uninitialization: */
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326 unsigned _System
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327 LibMain(unsigned hmod, unsigned termination)
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328 {
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329 if (termination) {
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330 #ifdef DEBUG_BUILD
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331 /* printf("[SDL DLL Unintialization] : Removing exception handler\n"); */
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332 #endif
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333 DosUnsetExceptionHandler(&SDL_Main_xcpthand);
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334 return 1;
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335 } else {
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336 #ifdef DEBUG_BUILD
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337 /* Make stdout and stderr unbuffered! */
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338 setbuf(stdout, NULL);
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339 setbuf(stderr, NULL);
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340 #endif
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341 /* Fire up exception handler */
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342 #ifdef DEBUG_BUILD
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343 /* printf("[SDL DLL Initialization] : Setting exception handler\n"); */
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344 #endif
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345 /* Set exception handler */
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346 DosSetExceptionHandler(&SDL_Main_xcpthand);
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347
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348 return 1;
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349 }
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350 }
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351 #endif /* __WATCOMC__ */
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352
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353 #elif defined(__WIN32__)
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354
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diff changeset
355 #if !defined(HAVE_LIBC) || (defined(__WATCOMC__) && defined(BUILD_DLL))
8dfa9a6d69a5 Updated WinCE support by Dmitry (with some tweaks)
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356 /* Need to include DllMain() on Watcom C for some reason.. */
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bb6839704ed6 SDL_windows.h is no longer necessary
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357 #define WIN32_LEAN_AND_MEAN
bb6839704ed6 SDL_windows.h is no longer necessary
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358 #include <windows.h>
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diff changeset
359
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diff changeset
360 BOOL APIENTRY
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diff changeset
361 _DllMainCRTStartup(HANDLE hModule,
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362 DWORD ul_reason_for_call, LPVOID lpReserved)
1330
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diff changeset
363 {
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diff changeset
364 switch (ul_reason_for_call) {
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diff changeset
365 case DLL_PROCESS_ATTACH:
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diff changeset
366 case DLL_THREAD_ATTACH:
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diff changeset
367 case DLL_THREAD_DETACH:
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diff changeset
368 case DLL_PROCESS_DETACH:
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diff changeset
369 break;
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diff changeset
370 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
371 return TRUE;
1330
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diff changeset
372 }
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diff changeset
373 #endif /* building DLL with Watcom C */
1330
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diff changeset
374
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diff changeset
375 #endif /* OS/2 elif __WIN32__ */
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diff changeset
376
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
377 /* vi: set ts=4 sw=4 expandtab: */