SDL_systimer.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
slouken@libsdl.org
*/
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#include "SDL_config.h"
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#ifdef SDL_TIMER_DC
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#include <kos.h>
#include "SDL_thread.h"
#include "SDL_timer.h"
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#include "../SDL_timer_c.h"
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static unsigned start;
/*
jif = ms * HZ /1000
ms = jif * 1000/HZ
*/
void SDL_StartTicks(void)
{
/* Set first ticks value */
start = jiffies;
}
Uint32 SDL_GetTicks(void)
{
return((jiffies-start)*1000/HZ);
}
void SDL_Delay(Uint32 ms)
{
thd_sleep(ms);
}
/* 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: DC uses threaded timer");
return(-1);
}
void SDL_SYS_StopTimer(void)
{
return;
}
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#endif /* SDL_TIMER_DC */