SDL_systimer.c
资源名称:NETVIDEO.rar [点击查看]
上传用户:sun1608
上传日期:2007-02-02
资源大小:6116k
文件大小:2k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
Visual C++
- /*
- SDL - Simple DirectMedia Layer
- Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public
- License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
- 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
- Library General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with this library; if not, write to the Free
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- Sam Lantinga
- slouken@libsdl.org
- */
- #ifdef SAVE_RCSID
- static char rcsid =
- "@(#) $Id: SDL_systimer.c,v 1.4 2002/04/22 21:38:03 wmay Exp $";
- #endif
- #include <be/kernel/OS.h>
- #include "SDL_thread.h"
- #include "SDL_timer.h"
- #include "SDL_error.h"
- #include "SDL_timer_c.h"
- static bigtime_t start;
- void SDL_StartTicks(void)
- {
- /* Set first ticks value */
- start = system_time();
- }
- Uint32 SDL_GetTicks(void)
- {
- return((system_time()-start)/1000);
- }
- void SDL_Delay(Uint32 ms)
- {
- snooze(ms*1000);
- }
- /* Data to handle a single periodic alarm */
- static int timer_alive = 0;
- static SDL_Thread *timer = NULL;
- static int RunTimer(void *unused)
- {
- while ( timer_alive ) {
- if ( SDL_timer_running ) {
- SDL_ThreadedTimerCheck();
- }
- SDL_Delay(10);
- }
- return(0);
- }
- /* This is only called if the event thread is not running */
- int SDL_SYS_TimerInit(void)
- {
- timer_alive = 1;
- timer = SDL_CreateThread(RunTimer, NULL);
- if ( timer == NULL )
- return(-1);
- return(SDL_SetTimerThreaded(1));
- }
- void SDL_SYS_TimerQuit(void)
- {
- timer_alive = 0;
- if ( timer ) {
- SDL_WaitThread(timer, NULL);
- timer = NULL;
- }
- }
- int SDL_SYS_StartTimer(void)
- {
- SDL_SetError("Internal logic error: BeOS uses threaded timer");
- return(-1);
- }
- void SDL_SYS_StopTimer(void)
- {
- return;
- }