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SDL.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2006 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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Sam Lantinga
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slouken@libsdl.org
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*/
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#include "SDL_config.h"
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/* Initialization code for SDL */
#include "SDL.h"
#include "SDL_fatal.h"
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#if !SDL_VIDEO_DISABLED
#include "video/SDL_leaks.h"
#endif
#if SDL_THREAD_PTH
#include <pth.h>
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#endif
/* Initialization/Cleanup routines */
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#if !SDL_JOYSTICK_DISABLED
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extern int SDL_JoystickInit(void);
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extern void SDL_JoystickQuit(void);
#endif
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#if !SDL_TOUCHSCREEN_DISABLED
extern int SDL_TouchscreenInit(void);
extern void SDL_TouchscreenQuit(void);
#endif
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#if !SDL_CDROM_DISABLED
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extern int SDL_CDROMInit(void);
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extern void SDL_CDROMQuit(void);
#endif
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#if !SDL_TIMERS_DISABLED
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extern void SDL_StartTicks(void);
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extern int SDL_TimerInit(void);
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extern void SDL_TimerQuit(void);
#endif
/* The initialized subsystems */
static Uint32 SDL_initialized = 0;
static Uint32 ticks_started = 0;
#ifdef CHECK_LEAKS
int surfaces_allocated = 0;
#endif
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int
SDL_InitSubSystem(Uint32 flags)
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#if !SDL_VIDEO_DISABLED
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/* Initialize the video/event subsystem */
if ((flags & SDL_INIT_VIDEO) && !(SDL_initialized & SDL_INIT_VIDEO)) {
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if (SDL_VideoInit(NULL, (flags & SDL_INIT_EVENTTHREAD)) < 0) {
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return (-1);
}
SDL_initialized |= SDL_INIT_VIDEO;
}
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#else
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if (flags & SDL_INIT_VIDEO) {
SDL_SetError("SDL not built with video support");
return (-1);
}
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#endif
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#if !SDL_AUDIO_DISABLED
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/* Initialize the audio subsystem */
if ((flags & SDL_INIT_AUDIO) && !(SDL_initialized & SDL_INIT_AUDIO)) {
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if (SDL_AudioInit(NULL) < 0) {
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return (-1);
}
SDL_initialized |= SDL_INIT_AUDIO;
}
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#else
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if (flags & SDL_INIT_AUDIO) {
SDL_SetError("SDL not built with audio support");
return (-1);
}
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#endif
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#if !SDL_TIMERS_DISABLED
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/* Initialize the timer subsystem */
if (!ticks_started) {
SDL_StartTicks();
ticks_started = 1;
}
if ((flags & SDL_INIT_TIMER) && !(SDL_initialized & SDL_INIT_TIMER)) {
if (SDL_TimerInit() < 0) {
return (-1);
}
SDL_initialized |= SDL_INIT_TIMER;
}
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#else
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if (flags & SDL_INIT_TIMER) {
SDL_SetError("SDL not built with timer support");
return (-1);
}
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#endif
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#if !SDL_JOYSTICK_DISABLED
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/* Initialize the joystick subsystem */
if ((flags & SDL_INIT_JOYSTICK) && !(SDL_initialized & SDL_INIT_JOYSTICK)) {
if (SDL_JoystickInit() < 0) {
return (-1);
}
SDL_initialized |= SDL_INIT_JOYSTICK;
}
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#else
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if (flags & SDL_INIT_JOYSTICK) {
SDL_SetError("SDL not built with joystick support");
return (-1);
}
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#endif
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#if !SDL_TOUCHSCREEN_DISABLED
/* Initialize the touchscreen subsystem */
if ((flags & SDL_INIT_TOUCHSCREEN) && !(SDL_initialized & SDL_INIT_TOUCHSCREEN)) {
if (SDL_TouchscreenInit() < 0) {
return (-1);
}
SDL_initialized |= SDL_INIT_TOUCHSCREEN;
}
#else
if (flags & SDL_INIT_TOUCHSCREEN) {
SDL_SetError("SDL not built with touchscreen support");
return (-1);
}
#endif
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#if !SDL_CDROM_DISABLED
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/* Initialize the CD-ROM subsystem */
if ((flags & SDL_INIT_CDROM) && !(SDL_initialized & SDL_INIT_CDROM)) {
if (SDL_CDROMInit() < 0) {
return (-1);
}
SDL_initialized |= SDL_INIT_CDROM;
}
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#else
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if (flags & SDL_INIT_CDROM) {
SDL_SetError("SDL not built with cdrom support");
return (-1);
}
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#endif
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}
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int
SDL_Init(Uint32 flags)
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{
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#if !SDL_THREADS_DISABLED && SDL_THREAD_PTH
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if (!pth_init()) {
return -1;
}
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#endif
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/* Clear the error message */
SDL_ClearError();
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/* Initialize the desired subsystems */
if (SDL_InitSubSystem(flags) < 0) {
return (-1);
}
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/* Everything is initialized */
if (!(flags & SDL_INIT_NOPARACHUTE)) {
SDL_InstallParachute();
}
return (0);
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}
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void
SDL_QuitSubSystem(Uint32 flags)
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{
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/* Shut down requested initialized subsystems */
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#if !SDL_CDROM_DISABLED
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if ((flags & SDL_initialized & SDL_INIT_CDROM)) {
SDL_CDROMQuit();
SDL_initialized &= ~SDL_INIT_CDROM;
}
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#endif
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#if !SDL_JOYSTICK_DISABLED
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if ((flags & SDL_initialized & SDL_INIT_JOYSTICK)) {
SDL_JoystickQuit();
SDL_initialized &= ~SDL_INIT_JOYSTICK;
}
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#endif
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#if !SDL_TOUCHSCREEN_DISABLED
if ((flags & SDL_initialized & SDL_INIT_TOUCHSCREEN)) {
SDL_TouchscreenQuit();
SDL_initialized &= ~SDL_INIT_TOUCHSCREEN;
}
#endif
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#if !SDL_TIMERS_DISABLED
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if ((flags & SDL_initialized & SDL_INIT_TIMER)) {
SDL_TimerQuit();
SDL_initialized &= ~SDL_INIT_TIMER;
}
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#endif
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#if !SDL_AUDIO_DISABLED
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if ((flags & SDL_initialized & SDL_INIT_AUDIO)) {
SDL_AudioQuit();
SDL_initialized &= ~SDL_INIT_AUDIO;
}
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#endif
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#if !SDL_VIDEO_DISABLED
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if ((flags & SDL_initialized & SDL_INIT_VIDEO)) {
SDL_VideoQuit();
SDL_initialized &= ~SDL_INIT_VIDEO;
}
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#endif
}
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Uint32
SDL_WasInit(Uint32 flags)
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{
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if (!flags) {
flags = SDL_INIT_EVERYTHING;
}
return (SDL_initialized & flags);
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}
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void
SDL_Quit(void)
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{
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/* Quit all subsystems */
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#ifdef DEBUG_BUILD
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printf("[SDL_Quit] : Enter! Calling QuitSubSystem()\n");
fflush(stdout);
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#endif
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SDL_QuitSubSystem(SDL_INIT_EVERYTHING);
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#ifdef CHECK_LEAKS
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#ifdef DEBUG_BUILD
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printf("[SDL_Quit] : CHECK_LEAKS\n");
fflush(stdout);
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#endif
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/* Print the number of surfaces not freed */
if (surfaces_allocated != 0) {
fprintf(stderr, "SDL Warning: %d SDL surfaces extant\n",
surfaces_allocated);
}
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#endif
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#ifdef DEBUG_BUILD
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printf("[SDL_Quit] : SDL_UninstallParachute()\n");
fflush(stdout);
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#endif
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/* Uninstall any parachute signal handlers */
SDL_UninstallParachute();
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#if !SDL_THREADS_DISABLED && SDL_THREAD_PTH
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#endif
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#ifdef DEBUG_BUILD
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printf("[SDL_Quit] : Returning!\n");
fflush(stdout);
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#endif
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}
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/* Get the library version number */
void
SDL_GetVersion(SDL_version * ver)
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{
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SDL_VERSION(ver);
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}
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#if defined(__OS2__)
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/* Building for OS/2 */
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#ifdef __WATCOMC__
#define INCL_DOSERRORS
#define INCL_DOSEXCEPTIONS
#include <os2.h>
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/* Exception handler to prevent the Audio thread hanging, making a zombie process! */
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ULONG _System
SDL_Main_ExceptionHandler(PEXCEPTIONREPORTRECORD pERepRec,
PEXCEPTIONREGISTRATIONRECORD pERegRec,
PCONTEXTRECORD pCtxRec, PVOID p)
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{
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if (pERepRec->fHandlerFlags & EH_EXIT_UNWIND)
return XCPT_CONTINUE_SEARCH;
if (pERepRec->fHandlerFlags & EH_UNWINDING)
return XCPT_CONTINUE_SEARCH;
if (pERepRec->fHandlerFlags & EH_NESTED_CALL)
return XCPT_CONTINUE_SEARCH;
/* Do cleanup at every fatal exception! */
if (((pERepRec->ExceptionNum & XCPT_SEVERITY_CODE) ==
XCPT_FATAL_EXCEPTION) && (pERepRec->ExceptionNum != XCPT_BREAKPOINT)
&& (pERepRec->ExceptionNum != XCPT_SINGLE_STEP)) {
if (SDL_initialized & SDL_INIT_AUDIO) {
/* This removes the zombie audio thread in case of emergency. */
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#ifdef DEBUG_BUILD
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printf
("[SDL_Main_ExceptionHandler] : Calling SDL_CloseAudio()!\n");
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#endif
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SDL_CloseAudio();
}
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}
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return (XCPT_CONTINUE_SEARCH);
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}
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EXCEPTIONREGISTRATIONRECORD SDL_Main_xcpthand =
{ 0, SDL_Main_ExceptionHandler };
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/* The main DLL entry for DLL Initialization and Uninitialization: */
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unsigned _System
LibMain(unsigned hmod, unsigned termination)
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{
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if (termination) {
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#ifdef DEBUG_BUILD
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/* printf("[SDL DLL Unintialization] : Removing exception handler\n"); */
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#endif
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DosUnsetExceptionHandler(&SDL_Main_xcpthand);
return 1;
} else {
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#ifdef DEBUG_BUILD
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/* Make stdout and stderr unbuffered! */
setbuf(stdout, NULL);
setbuf(stderr, NULL);
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#endif
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/* Fire up exception handler */
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#ifdef DEBUG_BUILD
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/* printf("[SDL DLL Initialization] : Setting exception handler\n"); */
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#endif
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/* Set exception handler */
DosSetExceptionHandler(&SDL_Main_xcpthand);
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return 1;
}
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}
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#endif /* __WATCOMC__ */
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#elif defined(__WIN32__)
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#if !defined(HAVE_LIBC) || (defined(__WATCOMC__) && defined(BUILD_DLL))
/* Need to include DllMain() on Watcom C for some reason.. */
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#define WIN32_LEAN_AND_MEAN
#include <windows.h>
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BOOL APIENTRY
_DllMainCRTStartup(HANDLE hModule,
DWORD ul_reason_for_call, LPVOID lpReserved)
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switch (ul_reason_for_call) {
case DLL_PROCESS_ATTACH:
case DLL_THREAD_ATTACH:
case DLL_THREAD_DETACH:
case DLL_PROCESS_DETACH:
break;
}
return TRUE;
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#endif /* building DLL with Watcom C */
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#endif /* OS/2 elif __WIN32__ */
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/* vi: set ts=4 sw=4 expandtab: */