[sdl_omap.git] / src / timer / dc / SDL_systimer.c

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2009 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 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
    Lesser General Public License for more details.

    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

    Sam Lantinga
    slouken@libsdl.org
*/
#include "SDL_config.h"

#ifdef SDL_TIMER_DC

#include <kos.h>

#include "SDL_thread.h"
#include "SDL_timer.h"
#include "../SDL_timer_c.h"

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;
}

#endif /* SDL_TIMER_DC */
Commit	Line	Data
e14743d1	1	/*
	2	SDL - Simple DirectMedia Layer
	3	Copyright (C) 1997-2009 Sam Lantinga
	4
	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.
	9
	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.
	14
	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
	18
	19	Sam Lantinga
	20	slouken@libsdl.org
	21	*/
	22	#include "SDL_config.h"
	23
	24	#ifdef SDL_TIMER_DC
	25
	26	#include <kos.h>
	27
	28	#include "SDL_thread.h"
	29	#include "SDL_timer.h"
	30	#include "../SDL_timer_c.h"
	31
	32	static unsigned start;
	33
	34	/*
	35	jif = ms * HZ /1000
	36	ms = jif * 1000/HZ
	37	*/
	38
	39	void SDL_StartTicks(void)
	40	{
	41	/* Set first ticks value */
	42	start = jiffies;
	43	}
	44
	45	Uint32 SDL_GetTicks(void)
	46	{
	47	return((jiffies-start)*1000/HZ);
	48	}
	49
	50	void SDL_Delay(Uint32 ms)
	51	{
	52	thd_sleep(ms);
	53	}
	54
	55	/* Data to handle a single periodic alarm */
	56	static int timer_alive = 0;
	57	static SDL_Thread *timer = NULL;
	58
	59	static int RunTimer(void *unused)
	60	{
	61	while ( timer_alive ) {
	62	if ( SDL_timer_running ) {
	63	SDL_ThreadedTimerCheck();
	64	}
65	SDL_Delay(10);
66	}
67	return(0);
68	}
69
70	/* This is only called if the event thread is not running */
71	int SDL_SYS_TimerInit(void)
72	{
73	timer_alive = 1;
74	timer = SDL_CreateThread(RunTimer, NULL);
75	if ( timer == NULL )
76	return(-1);
77	return(SDL_SetTimerThreaded(1));
78	}
79
80	void SDL_SYS_TimerQuit(void)
81	{
82	timer_alive = 0;
83	if ( timer ) {
84	SDL_WaitThread(timer, NULL);
85	timer = NULL;
86	}
87	}
88
89	int SDL_SYS_StartTimer(void)
90	{
91	SDL_SetError("Internal logic error: DC uses threaded timer");
92	return(-1);
93	}
94
95	void SDL_SYS_StopTimer(void)
96	{
97	return;
98	}
99
100	#endif /* SDL_TIMER_DC */