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annotate src/SDL.c @ 3227:458e53d8662c

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Clarified API documentation
author Sam Lantinga <slouken@libsdl.org>
date Sun, 02 Aug 2009 18:39:57 +0000
parents 972a69e47cd9
children 5db962a9a991
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 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_HAPTIC_DISABLED
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42 extern int SDL_HapticInit(void);
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43 extern int SDL_HapticQuit(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 #if defined(__WIN32__)
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55 extern int SDL_HelperWindowCreate(void);
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56 extern int SDL_HelperWindowDestroy(void);
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57 #endif
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58
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59 /* The initialized subsystems */
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60 static Uint32 SDL_initialized = 0;
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61 static Uint32 ticks_started = 0;
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62
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63 #ifdef CHECK_LEAKS
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64 int surfaces_allocated = 0;
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65 #endif
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66
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67 int
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68 SDL_InitSubSystem(Uint32 flags)
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69 {
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70 #if !SDL_VIDEO_DISABLED
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71 /* Initialize the video/event subsystem */
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72 if ((flags & SDL_INIT_VIDEO) && !(SDL_initialized & SDL_INIT_VIDEO)) {
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73 if (SDL_VideoInit(NULL, (flags & SDL_INIT_EVENTTHREAD)) < 0) {
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74 return (-1);
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75 }
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76 SDL_initialized |= SDL_INIT_VIDEO;
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77 }
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78 #else
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79 if (flags & SDL_INIT_VIDEO) {
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80 SDL_SetError("SDL not built with video support");
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81 return (-1);
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82 }
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83 #endif
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84
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85 #if !SDL_AUDIO_DISABLED
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86 /* Initialize the audio subsystem */
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87 if ((flags & SDL_INIT_AUDIO) && !(SDL_initialized & SDL_INIT_AUDIO)) {
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88 if (SDL_AudioInit(NULL) < 0) {
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89 return (-1);
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90 }
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91 SDL_initialized |= SDL_INIT_AUDIO;
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92 }
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93 #else
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94 if (flags & SDL_INIT_AUDIO) {
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95 SDL_SetError("SDL not built with audio support");
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96 return (-1);
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97 }
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98 #endif
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99
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100 #if !SDL_TIMERS_DISABLED
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101 /* Initialize the timer subsystem */
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102 if (!ticks_started) {
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103 SDL_StartTicks();
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104 ticks_started = 1;
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105 }
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106 if ((flags & SDL_INIT_TIMER) && !(SDL_initialized & SDL_INIT_TIMER)) {
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107 if (SDL_TimerInit() < 0) {
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108 return (-1);
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109 }
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110 SDL_initialized |= SDL_INIT_TIMER;
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111 }
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112 #else
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113 if (flags & SDL_INIT_TIMER) {
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114 SDL_SetError("SDL not built with timer support");
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115 return (-1);
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116 }
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117 #endif
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118
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119 #if !SDL_JOYSTICK_DISABLED
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120 /* Initialize the joystick subsystem */
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121 if ((flags & SDL_INIT_JOYSTICK) && !(SDL_initialized & SDL_INIT_JOYSTICK)) {
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122 if (SDL_JoystickInit() < 0) {
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123 return (-1);
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124 }
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125 SDL_initialized |= SDL_INIT_JOYSTICK;
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126 }
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127 #else
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128 if (flags & SDL_INIT_JOYSTICK) {
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129 SDL_SetError("SDL not built with joystick support");
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130 return (-1);
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131 }
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132 #endif
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133
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134 #if !SDL_HAPTIC_DISABLED
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135 /* Initialize the haptic subsystem */
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136 if ((flags & SDL_INIT_HAPTIC) && !(SDL_initialized & SDL_INIT_HAPTIC)) {
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137 if (SDL_HapticInit() < 0) {
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138 return (-1);
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139 }
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140 SDL_initialized |= SDL_INIT_HAPTIC;
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141 }
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142 #else
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143 if (flags & SDL_INIT_HAPTIC) {
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144 SDL_SetError("SDL not built with haptic (force feedback) support");
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145 return (-1);
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146 }
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147 #endif
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148
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149
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150 #if !SDL_CDROM_DISABLED
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151 /* Initialize the CD-ROM subsystem */
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152 if ((flags & SDL_INIT_CDROM) && !(SDL_initialized & SDL_INIT_CDROM)) {
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153 if (SDL_CDROMInit() < 0) {
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154 return (-1);
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155 }
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156 SDL_initialized |= SDL_INIT_CDROM;
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157 }
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158 #else
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159 if (flags & SDL_INIT_CDROM) {
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160 SDL_SetError("SDL not built with cdrom support");
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161 return (-1);
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162 }
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163 #endif
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164 return (0);
0
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165 }
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166
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167 int
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168 SDL_Init(Uint32 flags)
0
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169 {
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170 #if !SDL_THREADS_DISABLED && SDL_THREAD_PTH
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171 if (!pth_init()) {
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172 return -1;
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173 }
397
283d348cb624 Pth threading bug fix
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174 #endif
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175
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176 /* Clear the error message */
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177 SDL_ClearError();
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178
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179 #if defined(__WIN32__)
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180 if (SDL_HelperWindowCreate() < 0) {
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181 return -1;
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182 }
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183 #endif
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184
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185 /* Initialize the desired subsystems */
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186 if (SDL_InitSubSystem(flags) < 0) {
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187 return (-1);
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188 }
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189
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190 /* Everything is initialized */
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191 if (!(flags & SDL_INIT_NOPARACHUTE)) {
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192 SDL_InstallParachute();
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193 }
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194 return (0);
0
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195 }
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196
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197 void
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198 SDL_QuitSubSystem(Uint32 flags)
0
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199 {
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200 /* Shut down requested initialized subsystems */
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201 #if !SDL_CDROM_DISABLED
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202 if ((flags & SDL_initialized & SDL_INIT_CDROM)) {
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203 SDL_CDROMQuit();
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204 SDL_initialized &= ~SDL_INIT_CDROM;
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205 }
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206 #endif
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207 #if !SDL_JOYSTICK_DISABLED
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208 if ((flags & SDL_initialized & SDL_INIT_JOYSTICK)) {
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209 SDL_JoystickQuit();
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210 SDL_initialized &= ~SDL_INIT_JOYSTICK;
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211 }
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212 #endif
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213 #if !SDL_HAPTIC_DISABLED
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214 if ((flags & SDL_initialized & SDL_INIT_HAPTIC)) {
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215 SDL_HapticQuit();
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216 SDL_initialized &= ~SDL_INIT_HAPTIC;
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217 }
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218 #endif
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219 #if !SDL_TIMERS_DISABLED
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220 if ((flags & SDL_initialized & SDL_INIT_TIMER)) {
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221 SDL_TimerQuit();
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222 SDL_initialized &= ~SDL_INIT_TIMER;
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223 }
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224 #endif
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225 #if !SDL_AUDIO_DISABLED
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226 if ((flags & SDL_initialized & SDL_INIT_AUDIO)) {
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227 SDL_AudioQuit();
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228 SDL_initialized &= ~SDL_INIT_AUDIO;
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229 }
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230 #endif
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231 #if !SDL_VIDEO_DISABLED
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232 if ((flags & SDL_initialized & SDL_INIT_VIDEO)) {
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233 SDL_VideoQuit();
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234 SDL_initialized &= ~SDL_INIT_VIDEO;
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235 }
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236 #endif
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237 }
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238
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diff changeset
239 Uint32
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240 SDL_WasInit(Uint32 flags)
0
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241 {
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diff changeset
242 if (!flags) {
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diff changeset
243 flags = SDL_INIT_EVERYTHING;
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244 }
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245 return (SDL_initialized & flags);
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246 }
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247
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248 void
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249 SDL_Quit(void)
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250 {
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251 /* Quit all subsystems */
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252 #ifdef DEBUG_BUILD
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253 printf("[SDL_Quit] : Enter! Calling QuitSubSystem()\n");
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254 fflush(stdout);
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255 #endif
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256
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257 #if defined(__WIN32__)
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258 SDL_HelperWindowDestroy();
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259 #endif
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260 SDL_QuitSubSystem(SDL_INIT_EVERYTHING);
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261
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262 #ifdef CHECK_LEAKS
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263 #ifdef DEBUG_BUILD
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264 printf("[SDL_Quit] : CHECK_LEAKS\n");
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265 fflush(stdout);
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266 #endif
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267
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268 /* Print the number of surfaces not freed */
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269 if (surfaces_allocated != 0) {
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270 fprintf(stderr, "SDL Warning: %d SDL surfaces extant\n",
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271 surfaces_allocated);
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272 }
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273 #endif
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274 #ifdef DEBUG_BUILD
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275 printf("[SDL_Quit] : SDL_UninstallParachute()\n");
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276 fflush(stdout);
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277 #endif
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278
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279 /* Uninstall any parachute signal handlers */
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diff changeset
280 SDL_UninstallParachute();
397
283d348cb624 Pth threading bug fix
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diff changeset
281
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282 #if !SDL_THREADS_DISABLED && SDL_THREAD_PTH
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283 pth_kill();
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diff changeset
284 #endif
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285 #ifdef DEBUG_BUILD
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286 printf("[SDL_Quit] : Returning!\n");
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287 fflush(stdout);
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288 #endif
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289
0
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290 }
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291
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292 /* Get the library version number */
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293 void
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294 SDL_GetVersion(SDL_version * ver)
0
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295 {
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296 SDL_VERSION(ver);
0
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297 }
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298
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299 /* Get the library source revision */
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300 int
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301 SDL_GetRevision(void)
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302 {
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303 return SDL_REVISION;
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304 }
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305
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306 #if defined(__OS2__)
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307 /* Building for OS/2 */
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308 #ifdef __WATCOMC__
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309
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310 #define INCL_DOSERRORS
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311 #define INCL_DOSEXCEPTIONS
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312 #include <os2.h>
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313
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314 /* Exception handler to prevent the Audio thread hanging, making a zombie process! */
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315 ULONG _System
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316 SDL_Main_ExceptionHandler(PEXCEPTIONREPORTRECORD pERepRec,
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317 PEXCEPTIONREGISTRATIONRECORD pERegRec,
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318 PCONTEXTRECORD pCtxRec, PVOID p)
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319 {
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320 if (pERepRec->fHandlerFlags & EH_EXIT_UNWIND)
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321 return XCPT_CONTINUE_SEARCH;
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322 if (pERepRec->fHandlerFlags & EH_UNWINDING)
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323 return XCPT_CONTINUE_SEARCH;
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324 if (pERepRec->fHandlerFlags & EH_NESTED_CALL)
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325 return XCPT_CONTINUE_SEARCH;
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326
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327 /* Do cleanup at every fatal exception! */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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328 if (((pERepRec->ExceptionNum & XCPT_SEVERITY_CODE) ==
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329 XCPT_FATAL_EXCEPTION) && (pERepRec->ExceptionNum != XCPT_BREAKPOINT)
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330 && (pERepRec->ExceptionNum != XCPT_SINGLE_STEP)) {
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331 if (SDL_initialized & SDL_INIT_AUDIO) {
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332 /* This removes the zombie audio thread in case of emergency. */
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333 #ifdef DEBUG_BUILD
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334 printf
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335 ("[SDL_Main_ExceptionHandler] : Calling SDL_CloseAudio()!\n");
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336 #endif
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337 SDL_CloseAudio();
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338 }
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339 }
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340 return (XCPT_CONTINUE_SEARCH);
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341 }
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342
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343
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344 EXCEPTIONREGISTRATIONRECORD SDL_Main_xcpthand =
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345 { 0, SDL_Main_ExceptionHandler };
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346
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347 /* The main DLL entry for DLL Initialization and Uninitialization: */
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348 unsigned _System
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349 LibMain(unsigned hmod, unsigned termination)
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350 {
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351 if (termination) {
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352 #ifdef DEBUG_BUILD
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353 /* printf("[SDL DLL Unintialization] : Removing exception handler\n"); */
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354 #endif
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355 DosUnsetExceptionHandler(&SDL_Main_xcpthand);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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356 return 1;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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357 } else {
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358 #ifdef DEBUG_BUILD
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359 /* Make stdout and stderr unbuffered! */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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360 setbuf(stdout, NULL);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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361 setbuf(stderr, NULL);
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diff changeset
362 #endif
1895
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diff changeset
363 /* Fire up exception handler */
1190
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diff changeset
364 #ifdef DEBUG_BUILD
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diff changeset
365 /* printf("[SDL DLL Initialization] : Setting exception handler\n"); */
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diff changeset
366 #endif
1895
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diff changeset
367 /* Set exception handler */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
368 DosSetExceptionHandler(&SDL_Main_xcpthand);
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diff changeset
369
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diff changeset
370 return 1;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
371 }
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diff changeset
372 }
1330
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diff changeset
373 #endif /* __WATCOMC__ */
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374
1402
d910939febfa Use consistent identifiers for the various platforms we support.
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diff changeset
375 #elif defined(__WIN32__)
1330
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diff changeset
376
1465
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diff changeset
377 #if !defined(HAVE_LIBC) || (defined(__WATCOMC__) && defined(BUILD_DLL))
8dfa9a6d69a5 Updated WinCE support by Dmitry (with some tweaks)
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parents: 1433
diff changeset
378 /* Need to include DllMain() on Watcom C for some reason.. */
1433
bb6839704ed6 SDL_windows.h is no longer necessary
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diff changeset
379 #define WIN32_LEAN_AND_MEAN
bb6839704ed6 SDL_windows.h is no longer necessary
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diff changeset
380 #include <windows.h>
1330
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diff changeset
381
1895
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diff changeset
382 BOOL APIENTRY
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diff changeset
383 _DllMainCRTStartup(HANDLE hModule,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
384 DWORD ul_reason_for_call, LPVOID lpReserved)
1330
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diff changeset
385 {
1895
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diff changeset
386 switch (ul_reason_for_call) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
387 case DLL_PROCESS_ATTACH:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
388 case DLL_THREAD_ATTACH:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
389 case DLL_THREAD_DETACH:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
390 case DLL_PROCESS_DETACH:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
391 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
392 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
393 return TRUE;
1330
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diff changeset
394 }
1465
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Sam Lantinga <slouken@libsdl.org>
parents: 1433
diff changeset
395 #endif /* building DLL with Watcom C */
1330
450721ad5436 It's now possible to build SDL without any C runtime at all on Windows,
Sam Lantinga <slouken@libsdl.org>
parents: 1312
diff changeset
396
1402
d910939febfa Use consistent identifiers for the various platforms we support.
Sam Lantinga <slouken@libsdl.org>
parents: 1361
diff changeset
397 #endif /* OS/2 elif __WIN32__ */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1487
diff changeset
398
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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diff changeset
399 /* vi: set ts=4 sw=4 expandtab: */