src/SDL.c
author Ryan C. Gordon <icculus@icculus.org>
Wed, 13 Jan 2010 07:00:20 +0000
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child 3663 bc50cd16bb07
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/*
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    SDL - Simple DirectMedia Layer
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    Copyright (C) 1997-2009 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,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    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
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    License along with this library; if not, write to the Free Software
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    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 */
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#include "SDL.h"
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#include "SDL_fatal.h"
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#include "SDL_assert.h"
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#if !SDL_VIDEO_DISABLED
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#include "video/SDL_leaks.h"
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#endif
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#if SDL_THREAD_PTH
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#include <pth.h>
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#endif
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/* 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);
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#endif
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#if !SDL_HAPTIC_DISABLED
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extern int SDL_HapticInit(void);
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extern int SDL_HapticQuit(void);
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#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);
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#endif
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#if defined(__WIN32__)
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extern int SDL_HelperWindowCreate(void);
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extern int SDL_HelperWindowDestroy(void);
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#endif
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extern int SDL_AssertionsInit(void);
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extern void SDL_AssertionsQuit(void);
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/* The initialized subsystems */
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static Uint32 SDL_initialized = 0;
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static Uint32 ticks_started = 0;
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#ifdef CHECK_LEAKS
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int surfaces_allocated = 0;
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#endif
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int
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SDL_InitSubSystem(Uint32 flags)
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{
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#if !SDL_VIDEO_DISABLED
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    /* Initialize the video/event subsystem */
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    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);
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        }
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        SDL_initialized |= SDL_INIT_VIDEO;
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    }
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#else
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    if (flags & SDL_INIT_VIDEO) {
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        SDL_SetError("SDL not built with video support");
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        return (-1);
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    }
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#endif
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#if !SDL_AUDIO_DISABLED
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    /* Initialize the audio subsystem */
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    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);
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        }
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        SDL_initialized |= SDL_INIT_AUDIO;
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    }
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#else
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    if (flags & SDL_INIT_AUDIO) {
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        SDL_SetError("SDL not built with audio support");
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        return (-1);
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    }
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#endif
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#if !SDL_TIMERS_DISABLED
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    /* Initialize the timer subsystem */
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    if (!ticks_started) {
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        SDL_StartTicks();
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        ticks_started = 1;
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    }
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    if ((flags & SDL_INIT_TIMER) && !(SDL_initialized & SDL_INIT_TIMER)) {
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        if (SDL_TimerInit() < 0) {
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            return (-1);
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        }
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        SDL_initialized |= SDL_INIT_TIMER;
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    }
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#else
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    if (flags & SDL_INIT_TIMER) {
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        SDL_SetError("SDL not built with timer support");
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        return (-1);
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    }
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#endif
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#if !SDL_JOYSTICK_DISABLED
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    /* Initialize the joystick subsystem */
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    if ((flags & SDL_INIT_JOYSTICK) && !(SDL_initialized & SDL_INIT_JOYSTICK)) {
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        if (SDL_JoystickInit() < 0) {
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            return (-1);
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        }
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        SDL_initialized |= SDL_INIT_JOYSTICK;
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    }
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#else
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    if (flags & SDL_INIT_JOYSTICK) {
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        SDL_SetError("SDL not built with joystick support");
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        return (-1);
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    }
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#endif
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#if !SDL_HAPTIC_DISABLED
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    /* Initialize the haptic subsystem */
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    if ((flags & SDL_INIT_HAPTIC) && !(SDL_initialized & SDL_INIT_HAPTIC)) {
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        if (SDL_HapticInit() < 0) {
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            return (-1);
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        }
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        SDL_initialized |= SDL_INIT_HAPTIC;
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    }
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#else
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    if (flags & SDL_INIT_HAPTIC) {
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        SDL_SetError("SDL not built with haptic (force feedback) support");
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        return (-1);
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    }
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#endif
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    return (0);
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}
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int
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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()) {
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        return -1;
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    }
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#endif
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    if (SDL_AssertionsInit() < 0) {
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        return -1;
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    }
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    /* Clear the error message */
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    SDL_ClearError();
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#if defined(__WIN32__)
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    if (SDL_HelperWindowCreate() < 0) {
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        return -1;
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    }
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#endif
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    /* Initialize the desired subsystems */
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    if (SDL_InitSubSystem(flags) < 0) {
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        return (-1);
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    }
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    /* Everything is initialized */
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    if (!(flags & SDL_INIT_NOPARACHUTE)) {
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        SDL_InstallParachute();
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    }
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    /* brief sanity checks for the sanity checks.  :)  */
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    SDL_assert(1);
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    SDL_assert_release(1);
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    SDL_assert_paranoid(1);
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    SDL_assert(0 || 1);
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    SDL_assert_release(0 || 1);
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    SDL_assert_paranoid(0 || 1);
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#if 0   /* enable this to test assertion failures. */
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    SDL_assert_release(1 == 2);
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    SDL_assert_release(5 < 4);
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    SDL_assert_release(0 && "This is a test");
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#endif
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    return (0);
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}
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void
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SDL_QuitSubSystem(Uint32 flags)
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{
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    /* Shut down requested initialized subsystems */
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#if !SDL_JOYSTICK_DISABLED
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    if ((flags & SDL_initialized & SDL_INIT_JOYSTICK)) {
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        SDL_JoystickQuit();
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        SDL_initialized &= ~SDL_INIT_JOYSTICK;
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    }
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#endif
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#if !SDL_HAPTIC_DISABLED
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    if ((flags & SDL_initialized & SDL_INIT_HAPTIC)) {
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        SDL_HapticQuit();
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        SDL_initialized &= ~SDL_INIT_HAPTIC;
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    }
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#endif
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#if !SDL_TIMERS_DISABLED
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    if ((flags & SDL_initialized & SDL_INIT_TIMER)) {
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        SDL_TimerQuit();
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        SDL_initialized &= ~SDL_INIT_TIMER;
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    }
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#endif
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#if !SDL_AUDIO_DISABLED
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    if ((flags & SDL_initialized & SDL_INIT_AUDIO)) {
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        SDL_AudioQuit();
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        SDL_initialized &= ~SDL_INIT_AUDIO;
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    }
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#endif
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#if !SDL_VIDEO_DISABLED
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    if ((flags & SDL_initialized & SDL_INIT_VIDEO)) {
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        SDL_VideoQuit();
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        SDL_initialized &= ~SDL_INIT_VIDEO;
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    }
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#endif
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}
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Uint32
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SDL_WasInit(Uint32 flags)
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{
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    if (!flags) {
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        flags = SDL_INIT_EVERYTHING;
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    }
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    return (SDL_initialized & flags);
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}
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void
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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");
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    fflush(stdout);
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#endif
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#if defined(__WIN32__)
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    SDL_HelperWindowDestroy();
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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");
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    fflush(stdout);
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#endif
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    /* !!! FIXME: make this an assertion. */
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    /* Print the number of surfaces not freed */
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    if (surfaces_allocated != 0) {
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        fprintf(stderr, "SDL Warning: %d SDL surfaces extant\n",
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                surfaces_allocated);
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    }
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#endif
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#ifdef DEBUG_BUILD
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    printf("[SDL_Quit] : SDL_UninstallParachute()\n");
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    fflush(stdout);
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#endif
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    /* Uninstall any parachute signal handlers */
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    SDL_UninstallParachute();
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    SDL_AssertionsQuit();
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#if !SDL_THREADS_DISABLED && SDL_THREAD_PTH
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    pth_kill();
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#endif
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#ifdef DEBUG_BUILD
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    printf("[SDL_Quit] : Returning!\n");
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    fflush(stdout);
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#endif
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}
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/* Get the library version number */
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void
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SDL_GetVersion(SDL_version * ver)
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{
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    SDL_VERSION(ver);
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}
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/* Get the library source revision */
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int
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SDL_GetRevision(void)
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{
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    return SDL_REVISION;
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}
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/* Get the name of the platform */
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const char *
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SDL_GetPlatform()
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{
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#if __AIX__
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    return "AIX";
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#elif __HAIKU__
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/* Haiku must appear here before BeOS, since it also defines __BEOS__ */
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    return "Haiku";
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#elif __BEOS__
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    return "BeOS";
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#elif __BSDI__
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    return "BSDI";
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#elif __DREAMCAST__
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    return "Dreamcast";
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#elif __FREEBSD__
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    return "FreeBSD";
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#elif __HPUX__
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    return "HP-UX";
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#elif __IRIX__
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    return "Irix";
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#elif __LINUX__
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    return "Linux";
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#elif __MINT__
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    return "Atari MiNT";
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#elif __MACOS__
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    return "MacOS Classic";
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#elif __MACOSX__
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    return "Mac OS X";
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#elif __NETBSD__
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    return "NetBSD";
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#elif __OPENBSD__
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    return "OpenBSD";
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#elif __OS2__
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    return "OS/2";
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#elif __OSF__
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    return "OSF/1";
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#elif __QNXNTO__
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    return "QNX Neutrino";
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#elif __RISCOS__
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    return "RISC OS";
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#elif __SOLARIS__
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    return "Solaris";
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#elif __WIN32__
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#ifdef _WIN32_WCE
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    return "Windows CE";
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#else
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    return "Windows";
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   355
#endif
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   356
#elif __IPHONEOS__
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   357
    return "iPhone OS";
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   358
#else
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    return "Unknown (see SDL_platform.h)";
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#endif
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   361
}
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   362
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   363
#if defined(__WIN32__)
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   364
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#if !defined(HAVE_LIBC) || (defined(__WATCOMC__) && defined(BUILD_DLL))
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   366
/* Need to include DllMain() on Watcom C for some reason.. */
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#define WIN32_LEAN_AND_MEAN
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   368
#include <windows.h>
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BOOL APIENTRY
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   371
_DllMainCRTStartup(HANDLE hModule,
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                   DWORD ul_reason_for_call, LPVOID lpReserved)
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{
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   374
    switch (ul_reason_for_call) {
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   375
    case DLL_PROCESS_ATTACH:
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   376
    case DLL_THREAD_ATTACH:
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   377
    case DLL_THREAD_DETACH:
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   378
    case DLL_PROCESS_DETACH:
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   379
        break;
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diff changeset
   380
    }
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   381
    return TRUE;
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   382
}
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   383
#endif /* building DLL with Watcom C */
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450721ad5436 It's now possible to build SDL without any C runtime at all on Windows,
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   384
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   385
#endif /* __WIN32__ */
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   386
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   387
/* vi: set ts=4 sw=4 expandtab: */