2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997-2009 Sam Lantinga
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.
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.
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
22 #include "SDL_config.h"
28 #include "SDL_thread.h"
29 #include "SDL_timer.h"
30 #include "../SDL_timer_c.h"
32 static unsigned start;
39 void SDL_StartTicks(void)
41 /* Set first ticks value */
45 Uint32 SDL_GetTicks(void)
47 return((jiffies-start)*1000/HZ);
50 void SDL_Delay(Uint32 ms)
55 /* Data to handle a single periodic alarm */
56 static int timer_alive = 0;
57 static SDL_Thread *timer = NULL;
59 static int RunTimer(void *unused)
61 while ( timer_alive ) {
62 if ( SDL_timer_running ) {
63 SDL_ThreadedTimerCheck();
70 /* This is only called if the event thread is not running */
71 int SDL_SYS_TimerInit(void)
74 timer = SDL_CreateThread(RunTimer, NULL);
77 return(SDL_SetTimerThreaded(1));
80 void SDL_SYS_TimerQuit(void)
84 SDL_WaitThread(timer, NULL);
89 int SDL_SYS_StartTimer(void)
91 SDL_SetError("Internal logic error: DC uses threaded timer");
95 void SDL_SYS_StopTimer(void)
100 #endif /* SDL_TIMER_DC */