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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 current SDL version */ |
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52 static SDL_version version = |
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53 { SDL_MAJOR_VERSION, SDL_MINOR_VERSION, SDL_PATCHLEVEL }; |
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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 #if !SDL_TIMERS_DISABLED |
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58 static Uint32 ticks_started = 0; |
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59 #endif |
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60 |
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61 #ifdef CHECK_LEAKS |
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62 int surfaces_allocated = 0; |
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63 #endif |
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64 |
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65 int SDL_InitSubSystem(Uint32 flags) |
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66 { |
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67 #if !SDL_VIDEO_DISABLED |
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68 /* Initialize the video/event subsystem */ |
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69 if ( (flags & SDL_INIT_VIDEO) && !(SDL_initialized & SDL_INIT_VIDEO) ) { |
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70 if ( SDL_VideoInit(SDL_getenv("SDL_VIDEODRIVER"), |
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71 (flags&SDL_INIT_EVENTTHREAD)) < 0 ) { |
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72 return(-1); |
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73 } |
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74 SDL_initialized |= SDL_INIT_VIDEO; |
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75 } |
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76 #else |
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77 if ( flags & SDL_INIT_VIDEO ) { |
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78 SDL_SetError("SDL not built with video support"); |
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79 return(-1); |
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80 } |
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81 #endif |
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82 |
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83 #if !SDL_AUDIO_DISABLED |
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84 /* Initialize the audio subsystem */ |
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85 if ( (flags & SDL_INIT_AUDIO) && !(SDL_initialized & SDL_INIT_AUDIO) ) { |
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86 if ( SDL_AudioInit(SDL_getenv("SDL_AUDIODRIVER")) < 0 ) { |
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87 return(-1); |
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88 } |
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89 SDL_initialized |= SDL_INIT_AUDIO; |
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90 } |
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91 #else |
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92 if ( flags & SDL_INIT_AUDIO ) { |
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93 SDL_SetError("SDL not built with audio support"); |
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94 return(-1); |
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95 } |
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96 #endif |
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97 |
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98 #if !SDL_TIMERS_DISABLED |
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99 /* Initialize the timer subsystem */ |
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100 if ( ! ticks_started ) { |
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101 SDL_StartTicks(); |
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102 ticks_started = 1; |
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103 } |
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104 if ( (flags & SDL_INIT_TIMER) && !(SDL_initialized & SDL_INIT_TIMER) ) { |
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105 if ( SDL_TimerInit() < 0 ) { |
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106 return(-1); |
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107 } |
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108 SDL_initialized |= SDL_INIT_TIMER; |
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109 } |
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110 #else |
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111 if ( flags & SDL_INIT_TIMER ) { |
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112 SDL_SetError("SDL not built with timer support"); |
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113 return(-1); |
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114 } |
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115 #endif |
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116 |
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117 #if !SDL_JOYSTICK_DISABLED |
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118 /* Initialize the joystick subsystem */ |
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119 if ( (flags & SDL_INIT_JOYSTICK) && |
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120 !(SDL_initialized & SDL_INIT_JOYSTICK) ) { |
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121 if ( SDL_JoystickInit() < 0 ) { |
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122 return(-1); |
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123 } |
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124 SDL_initialized |= SDL_INIT_JOYSTICK; |
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125 } |
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126 #else |
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127 if ( flags & SDL_INIT_JOYSTICK ) { |
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128 SDL_SetError("SDL not built with joystick support"); |
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129 return(-1); |
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130 } |
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131 #endif |
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132 |
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133 #if !SDL_CDROM_DISABLED |
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134 /* Initialize the CD-ROM subsystem */ |
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135 if ( (flags & SDL_INIT_CDROM) && !(SDL_initialized & SDL_INIT_CDROM) ) { |
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136 if ( SDL_CDROMInit() < 0 ) { |
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137 return(-1); |
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138 } |
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139 SDL_initialized |= SDL_INIT_CDROM; |
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140 } |
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141 #else |
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142 if ( flags & SDL_INIT_CDROM ) { |
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143 SDL_SetError("SDL not built with cdrom support"); |
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144 return(-1); |
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145 } |
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146 #endif |
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147 return(0); |
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148 } |
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149 |
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150 int SDL_Init(Uint32 flags) |
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151 { |
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152 #if !SDL_THREADS_DISABLED && SDL_THREAD_PTH |
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153 if (!pth_init()) { |
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154 return -1; |
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155 } |
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156 #endif |
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157 |
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158 /* Clear the error message */ |
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159 SDL_ClearError(); |
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160 |
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161 /* Initialize the desired subsystems */ |
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162 if ( SDL_InitSubSystem(flags) < 0 ) { |
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163 return(-1); |
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164 } |
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165 |
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166 /* Everything is initialized */ |
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167 if ( !(flags & SDL_INIT_NOPARACHUTE) ) { |
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168 SDL_InstallParachute(); |
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169 } |
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170 return(0); |
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171 } |
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172 |
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173 void SDL_QuitSubSystem(Uint32 flags) |
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174 { |
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175 /* Shut down requested initialized subsystems */ |
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176 #if !SDL_CDROM_DISABLED |
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177 if ( (flags & SDL_initialized & SDL_INIT_CDROM) ) { |
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178 SDL_CDROMQuit(); |
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179 SDL_initialized &= ~SDL_INIT_CDROM; |
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180 } |
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181 #endif |
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182 #if !SDL_JOYSTICK_DISABLED |
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183 if ( (flags & SDL_initialized & SDL_INIT_JOYSTICK) ) { |
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184 SDL_JoystickQuit(); |
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185 SDL_initialized &= ~SDL_INIT_JOYSTICK; |
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186 } |
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187 #endif |
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188 #if !SDL_TIMERS_DISABLED |
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189 if ( (flags & SDL_initialized & SDL_INIT_TIMER) ) { |
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190 SDL_TimerQuit(); |
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191 SDL_initialized &= ~SDL_INIT_TIMER; |
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192 } |
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193 #endif |
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194 #if !SDL_AUDIO_DISABLED |
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195 if ( (flags & SDL_initialized & SDL_INIT_AUDIO) ) { |
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196 SDL_AudioQuit(); |
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197 SDL_initialized &= ~SDL_INIT_AUDIO; |
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198 } |
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199 #endif |
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200 #if !SDL_VIDEO_DISABLED |
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201 if ( (flags & SDL_initialized & SDL_INIT_VIDEO) ) { |
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202 SDL_VideoQuit(); |
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203 SDL_initialized &= ~SDL_INIT_VIDEO; |
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204 } |
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205 #endif |
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206 } |
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207 |
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208 Uint32 SDL_WasInit(Uint32 flags) |
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209 { |
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210 if ( ! flags ) { |
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211 flags = SDL_INIT_EVERYTHING; |
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212 } |
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213 return (SDL_initialized&flags); |
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214 } |
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215 |
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216 void SDL_Quit(void) |
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217 { |
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218 /* Quit all subsystems */ |
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219 #ifdef DEBUG_BUILD |
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220 printf("[SDL_Quit] : Enter! Calling QuitSubSystem()\n"); fflush(stdout); |
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221 #endif |
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222 SDL_QuitSubSystem(SDL_INIT_EVERYTHING); |
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223 |
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224 #ifdef CHECK_LEAKS |
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225 #ifdef DEBUG_BUILD |
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226 printf("[SDL_Quit] : CHECK_LEAKS\n"); fflush(stdout); |
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227 #endif |
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228 |
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229 /* Print the number of surfaces not freed */ |
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230 if ( surfaces_allocated != 0 ) { |
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231 fprintf(stderr, "SDL Warning: %d SDL surfaces extant\n", |
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232 surfaces_allocated); |
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233 } |
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234 #endif |
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235 #ifdef DEBUG_BUILD |
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236 printf("[SDL_Quit] : SDL_UninstallParachute()\n"); 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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241 |
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242 #if !SDL_THREADS_DISABLED && SDL_THREAD_PTH |
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243 pth_kill(); |
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244 #endif |
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245 #ifdef DEBUG_BUILD |
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246 printf("[SDL_Quit] : Returning!\n"); fflush(stdout); |
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247 #endif |
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248 |
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249 } |
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250 |
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251 /* Return the library version number */ |
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252 const SDL_version * SDL_Linked_Version(void) |
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253 { |
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254 return(&version); |
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255 } |
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256 |
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257 #if defined(__OS2__) |
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258 /* Building for OS/2 */ |
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259 #ifdef __WATCOMC__ |
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260 |
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261 #define INCL_DOSERRORS |
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262 #define INCL_DOSEXCEPTIONS |
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263 #include <os2.h> |
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264 |
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265 /* Exception handler to prevent the Audio thread hanging, making a zombie process! */ |
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266 ULONG _System SDL_Main_ExceptionHandler(PEXCEPTIONREPORTRECORD pERepRec, |
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267 PEXCEPTIONREGISTRATIONRECORD pERegRec, |
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268 PCONTEXTRECORD pCtxRec, |
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269 PVOID p) |
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270 { |
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271 if (pERepRec->fHandlerFlags & EH_EXIT_UNWIND) |
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272 return XCPT_CONTINUE_SEARCH; |
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273 if (pERepRec->fHandlerFlags & EH_UNWINDING) |
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274 return XCPT_CONTINUE_SEARCH; |
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275 if (pERepRec->fHandlerFlags & EH_NESTED_CALL) |
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276 return XCPT_CONTINUE_SEARCH; |
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277 |
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278 /* Do cleanup at every fatal exception! */ |
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279 if (((pERepRec->ExceptionNum & XCPT_SEVERITY_CODE) == XCPT_FATAL_EXCEPTION) && |
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280 (pERepRec->ExceptionNum != XCPT_BREAKPOINT) && |
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281 (pERepRec->ExceptionNum != XCPT_SINGLE_STEP) |
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282 ) |
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283 { |
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284 if (SDL_initialized & SDL_INIT_AUDIO) |
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285 { |
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286 /* This removes the zombie audio thread in case of emergency. */ |
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287 #ifdef DEBUG_BUILD |
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288 printf("[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 = {0, SDL_Main_ExceptionHandler}; |
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298 |
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299 /* The main DLL entry for DLL Initialization and Uninitialization: */ |
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300 unsigned _System LibMain(unsigned hmod, unsigned termination) |
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301 { |
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302 if (termination) |
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303 { |
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304 #ifdef DEBUG_BUILD |
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305 /* printf("[SDL DLL Unintialization] : Removing exception handler\n"); */ |
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306 #endif |
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307 DosUnsetExceptionHandler(&SDL_Main_xcpthand); |
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308 return 1; |
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309 } else |
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310 { |
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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__) && !defined(__SYMBIAN32__) |
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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 _DllMainCRTStartup( HANDLE hModule, |
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336 DWORD ul_reason_for_call, |
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337 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__ */ |