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annotate src/SDL.c @ 2173:26233707bc94

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author Sam Lantinga <slouken@libsdl.org>
date Wed, 11 Jul 2007 14:51:49 +0000
parents 8f1ab2f7c722
children 3f73c88c9abb f1d07ba2e275 0906692aa6a4
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_CDROM_DISABLED
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42 extern int SDL_CDROMInit(void);
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43 extern void SDL_CDROMQuit(void);
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44 #endif
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45 #if !SDL_TIMERS_DISABLED
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46 extern void SDL_StartTicks(void);
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47 extern int SDL_TimerInit(void);
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48 extern void SDL_TimerQuit(void);
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49 #endif
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50
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51 /* The initialized subsystems */
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52 static Uint32 SDL_initialized = 0;
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53 static Uint32 ticks_started = 0;
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54
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55 #ifdef CHECK_LEAKS
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56 int surfaces_allocated = 0;
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57 #endif
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58
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59 int
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60 SDL_InitSubSystem(Uint32 flags)
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61 {
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62 #if !SDL_VIDEO_DISABLED
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63 /* Initialize the video/event subsystem */
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64 if ((flags & SDL_INIT_VIDEO) && !(SDL_initialized & SDL_INIT_VIDEO)) {
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65 if (SDL_VideoInit(NULL, (flags & SDL_INIT_EVENTTHREAD)) < 0) {
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66 return (-1);
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67 }
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68 SDL_initialized |= SDL_INIT_VIDEO;
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69 }
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70 #else
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71 if (flags & SDL_INIT_VIDEO) {
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72 SDL_SetError("SDL not built with video support");
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73 return (-1);
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74 }
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75 #endif
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76
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77 #if !SDL_AUDIO_DISABLED
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78 /* Initialize the audio subsystem */
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79 if ((flags & SDL_INIT_AUDIO) && !(SDL_initialized & SDL_INIT_AUDIO)) {
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80 if (SDL_AudioInit(NULL) < 0) {
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81 return (-1);
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82 }
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83 SDL_initialized |= SDL_INIT_AUDIO;
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84 }
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85 #else
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86 if (flags & SDL_INIT_AUDIO) {
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87 SDL_SetError("SDL not built with audio support");
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88 return (-1);
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89 }
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90 #endif
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91
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92 #if !SDL_TIMERS_DISABLED
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93 /* Initialize the timer subsystem */
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94 if (!ticks_started) {
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95 SDL_StartTicks();
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96 ticks_started = 1;
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97 }
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98 if ((flags & SDL_INIT_TIMER) && !(SDL_initialized & SDL_INIT_TIMER)) {
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99 if (SDL_TimerInit() < 0) {
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100 return (-1);
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101 }
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102 SDL_initialized |= SDL_INIT_TIMER;
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103 }
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104 #else
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105 if (flags & SDL_INIT_TIMER) {
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106 SDL_SetError("SDL not built with timer support");
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107 return (-1);
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108 }
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109 #endif
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110
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111 #if !SDL_JOYSTICK_DISABLED
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112 /* Initialize the joystick subsystem */
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113 if ((flags & SDL_INIT_JOYSTICK) && !(SDL_initialized & SDL_INIT_JOYSTICK)) {
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114 if (SDL_JoystickInit() < 0) {
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115 return (-1);
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116 }
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117 SDL_initialized |= SDL_INIT_JOYSTICK;
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118 }
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119 #else
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120 if (flags & SDL_INIT_JOYSTICK) {
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121 SDL_SetError("SDL not built with joystick support");
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122 return (-1);
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123 }
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124 #endif
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125
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126 #if !SDL_CDROM_DISABLED
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127 /* Initialize the CD-ROM subsystem */
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128 if ((flags & SDL_INIT_CDROM) && !(SDL_initialized & SDL_INIT_CDROM)) {
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129 if (SDL_CDROMInit() < 0) {
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130 return (-1);
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131 }
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132 SDL_initialized |= SDL_INIT_CDROM;
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133 }
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134 #else
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135 if (flags & SDL_INIT_CDROM) {
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136 SDL_SetError("SDL not built with cdrom support");
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137 return (-1);
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diff changeset
138 }
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139 #endif
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140 return (0);
0
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141 }
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142
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diff changeset
143 int
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144 SDL_Init(Uint32 flags)
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145 {
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146 #if !SDL_THREADS_DISABLED && SDL_THREAD_PTH
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147 if (!pth_init()) {
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148 return -1;
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149 }
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150 #endif
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151
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152 /* Clear the error message */
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153 SDL_ClearError();
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154
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155 /* Initialize the desired subsystems */
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156 if (SDL_InitSubSystem(flags) < 0) {
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157 return (-1);
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158 }
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159
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160 /* Everything is initialized */
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161 if (!(flags & SDL_INIT_NOPARACHUTE)) {
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162 SDL_InstallParachute();
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163 }
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164 return (0);
0
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165 }
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166
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167 void
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168 SDL_QuitSubSystem(Uint32 flags)
0
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169 {
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170 /* Shut down requested initialized subsystems */
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171 #if !SDL_CDROM_DISABLED
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172 if ((flags & SDL_initialized & SDL_INIT_CDROM)) {
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173 SDL_CDROMQuit();
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174 SDL_initialized &= ~SDL_INIT_CDROM;
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175 }
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176 #endif
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177 #if !SDL_JOYSTICK_DISABLED
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178 if ((flags & SDL_initialized & SDL_INIT_JOYSTICK)) {
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179 SDL_JoystickQuit();
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180 SDL_initialized &= ~SDL_INIT_JOYSTICK;
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181 }
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182 #endif
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183 #if !SDL_TIMERS_DISABLED
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184 if ((flags & SDL_initialized & SDL_INIT_TIMER)) {
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185 SDL_TimerQuit();
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186 SDL_initialized &= ~SDL_INIT_TIMER;
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187 }
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188 #endif
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189 #if !SDL_AUDIO_DISABLED
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190 if ((flags & SDL_initialized & SDL_INIT_AUDIO)) {
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191 SDL_AudioQuit();
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192 SDL_initialized &= ~SDL_INIT_AUDIO;
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193 }
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194 #endif
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195 #if !SDL_VIDEO_DISABLED
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196 if ((flags & SDL_initialized & SDL_INIT_VIDEO)) {
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197 SDL_VideoQuit();
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198 SDL_initialized &= ~SDL_INIT_VIDEO;
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199 }
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200 #endif
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201 }
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202
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203 Uint32
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204 SDL_WasInit(Uint32 flags)
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205 {
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206 if (!flags) {
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207 flags = SDL_INIT_EVERYTHING;
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208 }
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209 return (SDL_initialized & flags);
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210 }
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211
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212 void
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213 SDL_Quit(void)
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214 {
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215 /* Quit all subsystems */
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216 #ifdef DEBUG_BUILD
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217 printf("[SDL_Quit] : Enter! Calling QuitSubSystem()\n");
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218 fflush(stdout);
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219 #endif
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220 SDL_QuitSubSystem(SDL_INIT_EVERYTHING);
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221
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222 #ifdef CHECK_LEAKS
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223 #ifdef DEBUG_BUILD
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224 printf("[SDL_Quit] : CHECK_LEAKS\n");
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225 fflush(stdout);
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226 #endif
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227
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228 /* Print the number of surfaces not freed */
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229 if (surfaces_allocated != 0) {
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230 fprintf(stderr, "SDL Warning: %d SDL surfaces extant\n",
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231 surfaces_allocated);
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232 }
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233 #endif
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234 #ifdef DEBUG_BUILD
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235 printf("[SDL_Quit] : SDL_UninstallParachute()\n");
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236 fflush(stdout);
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237 #endif
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238
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239 /* Uninstall any parachute signal handlers */
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240 SDL_UninstallParachute();
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diff changeset
241
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242 #if !SDL_THREADS_DISABLED && SDL_THREAD_PTH
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243 pth_kill();
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diff changeset
244 #endif
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245 #ifdef DEBUG_BUILD
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246 printf("[SDL_Quit] : Returning!\n");
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247 fflush(stdout);
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248 #endif
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249
0
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250 }
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251
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252 /* Get the library version number */
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253 void
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254 SDL_GetVersion(SDL_version * ver)
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255 {
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256 SDL_VERSION(ver);
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257 }
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258
1330
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diff changeset
259 #if defined(__OS2__)
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260 /* Building for OS/2 */
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261 #ifdef __WATCOMC__
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262
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diff changeset
263 #define INCL_DOSERRORS
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diff changeset
264 #define INCL_DOSEXCEPTIONS
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265 #include <os2.h>
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266
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267 /* Exception handler to prevent the Audio thread hanging, making a zombie process! */
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268 ULONG _System
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diff changeset
269 SDL_Main_ExceptionHandler(PEXCEPTIONREPORTRECORD pERepRec,
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diff changeset
270 PEXCEPTIONREGISTRATIONRECORD pERegRec,
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271 PCONTEXTRECORD pCtxRec, PVOID p)
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272 {
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273 if (pERepRec->fHandlerFlags & EH_EXIT_UNWIND)
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274 return XCPT_CONTINUE_SEARCH;
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275 if (pERepRec->fHandlerFlags & EH_UNWINDING)
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276 return XCPT_CONTINUE_SEARCH;
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277 if (pERepRec->fHandlerFlags & EH_NESTED_CALL)
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278 return XCPT_CONTINUE_SEARCH;
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279
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280 /* Do cleanup at every fatal exception! */
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281 if (((pERepRec->ExceptionNum & XCPT_SEVERITY_CODE) ==
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282 XCPT_FATAL_EXCEPTION) && (pERepRec->ExceptionNum != XCPT_BREAKPOINT)
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283 && (pERepRec->ExceptionNum != XCPT_SINGLE_STEP)) {
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284 if (SDL_initialized & SDL_INIT_AUDIO) {
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285 /* This removes the zombie audio thread in case of emergency. */
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286 #ifdef DEBUG_BUILD
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287 printf
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288 ("[SDL_Main_ExceptionHandler] : Calling SDL_CloseAudio()!\n");
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289 #endif
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290 SDL_CloseAudio();
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291 }
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292 }
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293 return (XCPT_CONTINUE_SEARCH);
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294 }
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295
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296
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297 EXCEPTIONREGISTRATIONRECORD SDL_Main_xcpthand =
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298 { 0, SDL_Main_ExceptionHandler };
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299
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300 /* The main DLL entry for DLL Initialization and Uninitialization: */
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301 unsigned _System
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302 LibMain(unsigned hmod, unsigned termination)
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303 {
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304 if (termination) {
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305 #ifdef DEBUG_BUILD
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306 /* printf("[SDL DLL Unintialization] : Removing exception handler\n"); */
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307 #endif
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308 DosUnsetExceptionHandler(&SDL_Main_xcpthand);
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309 return 1;
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310 } else {
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311 #ifdef DEBUG_BUILD
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312 /* Make stdout and stderr unbuffered! */
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313 setbuf(stdout, NULL);
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314 setbuf(stderr, NULL);
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315 #endif
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316 /* Fire up exception handler */
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317 #ifdef DEBUG_BUILD
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318 /* printf("[SDL DLL Initialization] : Setting exception handler\n"); */
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319 #endif
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320 /* Set exception handler */
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321 DosSetExceptionHandler(&SDL_Main_xcpthand);
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322
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323 return 1;
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324 }
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325 }
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326 #endif /* __WATCOMC__ */
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327
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328 #elif defined(__WIN32__)
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329
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330 #if !defined(HAVE_LIBC) || (defined(__WATCOMC__) && defined(BUILD_DLL))
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331 /* Need to include DllMain() on Watcom C for some reason.. */
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332 #define WIN32_LEAN_AND_MEAN
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333 #include <windows.h>
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334
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335 BOOL APIENTRY
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336 _DllMainCRTStartup(HANDLE hModule,
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337 DWORD ul_reason_for_call, LPVOID lpReserved)
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338 {
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339 switch (ul_reason_for_call) {
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340 case DLL_PROCESS_ATTACH:
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341 case DLL_THREAD_ATTACH:
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342 case DLL_THREAD_DETACH:
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343 case DLL_PROCESS_DETACH:
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344 break;
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345 }
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346 return TRUE;
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347 }
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348 #endif /* building DLL with Watcom C */
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349
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350 #endif /* OS/2 elif __WIN32__ */
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351
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352 /* vi: set ts=4 sw=4 expandtab: */