| 1 | /* |
| 2 | SDL - Simple DirectMedia Layer |
| 3 | Copyright (C) 1997-2009 Sam Lantinga |
| 4 | |
| 5 | This library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | This library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with this library; if not, write to the Free Software |
| 17 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 18 | |
| 19 | Sam Lantinga |
| 20 | slouken@libsdl.org |
| 21 | */ |
| 22 | #include "SDL_config.h" |
| 23 | |
| 24 | /* Initialization code for SDL */ |
| 25 | |
| 26 | #include "SDL.h" |
| 27 | #include "SDL_fatal.h" |
| 28 | #if !SDL_VIDEO_DISABLED |
| 29 | #include "video/SDL_leaks.h" |
| 30 | #endif |
| 31 | |
| 32 | #if SDL_THREAD_PTH |
| 33 | #include <pth.h> |
| 34 | #endif |
| 35 | |
| 36 | /* Initialization/Cleanup routines */ |
| 37 | #if !SDL_JOYSTICK_DISABLED |
| 38 | extern int SDL_JoystickInit(void); |
| 39 | extern void SDL_JoystickQuit(void); |
| 40 | #endif |
| 41 | #if !SDL_CDROM_DISABLED |
| 42 | extern int SDL_CDROMInit(void); |
| 43 | extern void SDL_CDROMQuit(void); |
| 44 | #endif |
| 45 | #if !SDL_TIMERS_DISABLED |
| 46 | extern void SDL_StartTicks(void); |
| 47 | extern int SDL_TimerInit(void); |
| 48 | extern void SDL_TimerQuit(void); |
| 49 | #endif |
| 50 | |
| 51 | /* The current SDL version */ |
| 52 | static SDL_version version = |
| 53 | { SDL_MAJOR_VERSION, SDL_MINOR_VERSION, SDL_PATCHLEVEL }; |
| 54 | |
| 55 | /* The initialized subsystems */ |
| 56 | static Uint32 SDL_initialized = 0; |
| 57 | #if !SDL_TIMERS_DISABLED |
| 58 | static Uint32 ticks_started = 0; |
| 59 | #endif |
| 60 | |
| 61 | #ifdef CHECK_LEAKS |
| 62 | int surfaces_allocated = 0; |
| 63 | #endif |
| 64 | |
| 65 | int SDL_InitSubSystem(Uint32 flags) |
| 66 | { |
| 67 | #if !SDL_VIDEO_DISABLED |
| 68 | /* Initialize the video/event subsystem */ |
| 69 | if ( (flags & SDL_INIT_VIDEO) && !(SDL_initialized & SDL_INIT_VIDEO) ) { |
| 70 | if ( SDL_VideoInit(SDL_getenv("SDL_VIDEODRIVER"), |
| 71 | (flags&SDL_INIT_EVENTTHREAD)) < 0 ) { |
| 72 | return(-1); |
| 73 | } |
| 74 | SDL_initialized |= SDL_INIT_VIDEO; |
| 75 | } |
| 76 | #else |
| 77 | if ( flags & SDL_INIT_VIDEO ) { |
| 78 | SDL_SetError("SDL not built with video support"); |
| 79 | return(-1); |
| 80 | } |
| 81 | #endif |
| 82 | |
| 83 | #if !SDL_AUDIO_DISABLED |
| 84 | /* Initialize the audio subsystem */ |
| 85 | if ( (flags & SDL_INIT_AUDIO) && !(SDL_initialized & SDL_INIT_AUDIO) ) { |
| 86 | if ( SDL_AudioInit(SDL_getenv("SDL_AUDIODRIVER")) < 0 ) { |
| 87 | return(-1); |
| 88 | } |
| 89 | SDL_initialized |= SDL_INIT_AUDIO; |
| 90 | } |
| 91 | #else |
| 92 | if ( flags & SDL_INIT_AUDIO ) { |
| 93 | SDL_SetError("SDL not built with audio support"); |
| 94 | return(-1); |
| 95 | } |
| 96 | #endif |
| 97 | |
| 98 | #if !SDL_TIMERS_DISABLED |
| 99 | /* Initialize the timer subsystem */ |
| 100 | if ( ! ticks_started ) { |
| 101 | SDL_StartTicks(); |
| 102 | ticks_started = 1; |
| 103 | } |
| 104 | if ( (flags & SDL_INIT_TIMER) && !(SDL_initialized & SDL_INIT_TIMER) ) { |
| 105 | if ( SDL_TimerInit() < 0 ) { |
| 106 | return(-1); |
| 107 | } |
| 108 | SDL_initialized |= SDL_INIT_TIMER; |
| 109 | } |
| 110 | #else |
| 111 | if ( flags & SDL_INIT_TIMER ) { |
| 112 | SDL_SetError("SDL not built with timer support"); |
| 113 | return(-1); |
| 114 | } |
| 115 | #endif |
| 116 | |
| 117 | #if !SDL_JOYSTICK_DISABLED |
| 118 | /* Initialize the joystick subsystem */ |
| 119 | if ( (flags & SDL_INIT_JOYSTICK) && |
| 120 | !(SDL_initialized & SDL_INIT_JOYSTICK) ) { |
| 121 | if ( SDL_JoystickInit() < 0 ) { |
| 122 | return(-1); |
| 123 | } |
| 124 | SDL_initialized |= SDL_INIT_JOYSTICK; |
| 125 | } |
| 126 | #else |
| 127 | if ( flags & SDL_INIT_JOYSTICK ) { |
| 128 | SDL_SetError("SDL not built with joystick support"); |
| 129 | return(-1); |
| 130 | } |
| 131 | #endif |
| 132 | |
| 133 | #if !SDL_CDROM_DISABLED |
| 134 | /* Initialize the CD-ROM subsystem */ |
| 135 | if ( (flags & SDL_INIT_CDROM) && !(SDL_initialized & SDL_INIT_CDROM) ) { |
| 136 | if ( SDL_CDROMInit() < 0 ) { |
| 137 | return(-1); |
| 138 | } |
| 139 | SDL_initialized |= SDL_INIT_CDROM; |
| 140 | } |
| 141 | #else |
| 142 | if ( flags & SDL_INIT_CDROM ) { |
| 143 | SDL_SetError("SDL not built with cdrom support"); |
| 144 | return(-1); |
| 145 | } |
| 146 | #endif |
| 147 | return(0); |
| 148 | } |
| 149 | |
| 150 | int SDL_Init(Uint32 flags) |
| 151 | { |
| 152 | #if !SDL_THREADS_DISABLED && SDL_THREAD_PTH |
| 153 | if (!pth_init()) { |
| 154 | return -1; |
| 155 | } |
| 156 | #endif |
| 157 | |
| 158 | /* Clear the error message */ |
| 159 | SDL_ClearError(); |
| 160 | |
| 161 | /* Initialize the desired subsystems */ |
| 162 | if ( SDL_InitSubSystem(flags) < 0 ) { |
| 163 | return(-1); |
| 164 | } |
| 165 | |
| 166 | /* Everything is initialized */ |
| 167 | if ( !(flags & SDL_INIT_NOPARACHUTE) ) { |
| 168 | SDL_InstallParachute(); |
| 169 | } |
| 170 | return(0); |
| 171 | } |
| 172 | |
| 173 | void SDL_QuitSubSystem(Uint32 flags) |
| 174 | { |
| 175 | /* Shut down requested initialized subsystems */ |
| 176 | #if !SDL_CDROM_DISABLED |
| 177 | if ( (flags & SDL_initialized & SDL_INIT_CDROM) ) { |
| 178 | SDL_CDROMQuit(); |
| 179 | SDL_initialized &= ~SDL_INIT_CDROM; |
| 180 | } |
| 181 | #endif |
| 182 | #if !SDL_JOYSTICK_DISABLED |
| 183 | if ( (flags & SDL_initialized & SDL_INIT_JOYSTICK) ) { |
| 184 | SDL_JoystickQuit(); |
| 185 | SDL_initialized &= ~SDL_INIT_JOYSTICK; |
| 186 | } |
| 187 | #endif |
| 188 | #if !SDL_TIMERS_DISABLED |
| 189 | if ( (flags & SDL_initialized & SDL_INIT_TIMER) ) { |
| 190 | SDL_TimerQuit(); |
| 191 | SDL_initialized &= ~SDL_INIT_TIMER; |
| 192 | } |
| 193 | #endif |
| 194 | #if !SDL_AUDIO_DISABLED |
| 195 | if ( (flags & SDL_initialized & SDL_INIT_AUDIO) ) { |
| 196 | SDL_AudioQuit(); |
| 197 | SDL_initialized &= ~SDL_INIT_AUDIO; |
| 198 | } |
| 199 | #endif |
| 200 | #if !SDL_VIDEO_DISABLED |
| 201 | if ( (flags & SDL_initialized & SDL_INIT_VIDEO) ) { |
| 202 | SDL_VideoQuit(); |
| 203 | SDL_initialized &= ~SDL_INIT_VIDEO; |
| 204 | } |
| 205 | #endif |
| 206 | } |
| 207 | |
| 208 | Uint32 SDL_WasInit(Uint32 flags) |
| 209 | { |
| 210 | if ( ! flags ) { |
| 211 | flags = SDL_INIT_EVERYTHING; |
| 212 | } |
| 213 | return (SDL_initialized&flags); |
| 214 | } |
| 215 | |
| 216 | void SDL_Quit(void) |
| 217 | { |
| 218 | /* Quit all subsystems */ |
| 219 | #ifdef DEBUG_BUILD |
| 220 | printf("[SDL_Quit] : Enter! Calling QuitSubSystem()\n"); fflush(stdout); |
| 221 | #endif |
| 222 | SDL_QuitSubSystem(SDL_INIT_EVERYTHING); |
| 223 | |
| 224 | #ifdef CHECK_LEAKS |
| 225 | #ifdef DEBUG_BUILD |
| 226 | printf("[SDL_Quit] : CHECK_LEAKS\n"); fflush(stdout); |
| 227 | #endif |
| 228 | |
| 229 | /* Print the number of surfaces not freed */ |
| 230 | if ( surfaces_allocated != 0 ) { |
| 231 | fprintf(stderr, "SDL Warning: %d SDL surfaces extant\n", |
| 232 | surfaces_allocated); |
| 233 | } |
| 234 | #endif |
| 235 | #ifdef DEBUG_BUILD |
| 236 | printf("[SDL_Quit] : SDL_UninstallParachute()\n"); fflush(stdout); |
| 237 | #endif |
| 238 | |
| 239 | /* Uninstall any parachute signal handlers */ |
| 240 | SDL_UninstallParachute(); |
| 241 | |
| 242 | #if !SDL_THREADS_DISABLED && SDL_THREAD_PTH |
| 243 | pth_kill(); |
| 244 | #endif |
| 245 | #ifdef DEBUG_BUILD |
| 246 | printf("[SDL_Quit] : Returning!\n"); fflush(stdout); |
| 247 | #endif |
| 248 | |
| 249 | } |
| 250 | |
| 251 | /* Return the library version number */ |
| 252 | const SDL_version * SDL_Linked_Version(void) |
| 253 | { |
| 254 | return(&version); |
| 255 | } |
| 256 | |
| 257 | #if defined(__OS2__) |
| 258 | /* Building for OS/2 */ |
| 259 | #ifdef __WATCOMC__ |
| 260 | |
| 261 | #define INCL_DOSERRORS |
| 262 | #define INCL_DOSEXCEPTIONS |
| 263 | #include <os2.h> |
| 264 | |
| 265 | /* Exception handler to prevent the Audio thread hanging, making a zombie process! */ |
| 266 | ULONG _System SDL_Main_ExceptionHandler(PEXCEPTIONREPORTRECORD pERepRec, |
| 267 | PEXCEPTIONREGISTRATIONRECORD pERegRec, |
| 268 | PCONTEXTRECORD pCtxRec, |
| 269 | PVOID p) |
| 270 | { |
| 271 | if (pERepRec->fHandlerFlags & EH_EXIT_UNWIND) |
| 272 | return XCPT_CONTINUE_SEARCH; |
| 273 | if (pERepRec->fHandlerFlags & EH_UNWINDING) |
| 274 | return XCPT_CONTINUE_SEARCH; |
| 275 | if (pERepRec->fHandlerFlags & EH_NESTED_CALL) |
| 276 | return XCPT_CONTINUE_SEARCH; |
| 277 | |
| 278 | /* Do cleanup at every fatal exception! */ |
| 279 | if (((pERepRec->ExceptionNum & XCPT_SEVERITY_CODE) == XCPT_FATAL_EXCEPTION) && |
| 280 | (pERepRec->ExceptionNum != XCPT_BREAKPOINT) && |
| 281 | (pERepRec->ExceptionNum != XCPT_SINGLE_STEP) |
| 282 | ) |
| 283 | { |
| 284 | if (SDL_initialized & SDL_INIT_AUDIO) |
| 285 | { |
| 286 | /* This removes the zombie audio thread in case of emergency. */ |
| 287 | #ifdef DEBUG_BUILD |
| 288 | printf("[SDL_Main_ExceptionHandler] : Calling SDL_CloseAudio()!\n"); |
| 289 | #endif |
| 290 | SDL_CloseAudio(); |
| 291 | } |
| 292 | } |
| 293 | return (XCPT_CONTINUE_SEARCH); |
| 294 | } |
| 295 | |
| 296 | |
| 297 | EXCEPTIONREGISTRATIONRECORD SDL_Main_xcpthand = {0, SDL_Main_ExceptionHandler}; |
| 298 | |
| 299 | /* The main DLL entry for DLL Initialization and Uninitialization: */ |
| 300 | unsigned _System LibMain(unsigned hmod, unsigned termination) |
| 301 | { |
| 302 | if (termination) |
| 303 | { |
| 304 | #ifdef DEBUG_BUILD |
| 305 | /* printf("[SDL DLL Unintialization] : Removing exception handler\n"); */ |
| 306 | #endif |
| 307 | DosUnsetExceptionHandler(&SDL_Main_xcpthand); |
| 308 | return 1; |
| 309 | } else |
| 310 | { |
| 311 | #ifdef DEBUG_BUILD |
| 312 | /* Make stdout and stderr unbuffered! */ |
| 313 | setbuf(stdout, NULL); |
| 314 | setbuf(stderr, NULL); |
| 315 | #endif |
| 316 | /* Fire up exception handler */ |
| 317 | #ifdef DEBUG_BUILD |
| 318 | /* printf("[SDL DLL Initialization] : Setting exception handler\n"); */ |
| 319 | #endif |
| 320 | /* Set exception handler */ |
| 321 | DosSetExceptionHandler(&SDL_Main_xcpthand); |
| 322 | |
| 323 | return 1; |
| 324 | } |
| 325 | } |
| 326 | #endif /* __WATCOMC__ */ |
| 327 | |
| 328 | #elif defined(__WIN32__) && !defined(__SYMBIAN32__) |
| 329 | |
| 330 | #if !defined(HAVE_LIBC) || (defined(__WATCOMC__) && defined(BUILD_DLL)) |
| 331 | /* Need to include DllMain() on Watcom C for some reason.. */ |
| 332 | #define WIN32_LEAN_AND_MEAN |
| 333 | #include <windows.h> |
| 334 | |
| 335 | BOOL APIENTRY _DllMainCRTStartup( HANDLE hModule, |
| 336 | DWORD ul_reason_for_call, |
| 337 | LPVOID lpReserved ) |
| 338 | { |
| 339 | switch (ul_reason_for_call) { |
| 340 | case DLL_PROCESS_ATTACH: |
| 341 | case DLL_THREAD_ATTACH: |
| 342 | case DLL_THREAD_DETACH: |
| 343 | case DLL_PROCESS_DETACH: |
| 344 | break; |
| 345 | } |
| 346 | return TRUE; |
| 347 | } |
| 348 | #endif /* building DLL with Watcom C */ |
| 349 | |
| 350 | #endif /* OS/2 elif __WIN32__ */ |