1/*
2    SDL - Simple DirectMedia Layer
3    Copyright (C) 1997-2012 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
32static unsigned start;
33
34/*
35	jif =  ms * HZ /1000
36	ms  = jif * 1000/HZ
37*/
38
39void SDL_StartTicks(void)
40{
41	/* Set first ticks value */
42	start = jiffies;
43}
44
45Uint32 SDL_GetTicks(void)
46{
47	return((jiffies-start)*1000/HZ);
48}
49
50void SDL_Delay(Uint32 ms)
51{
52	thd_sleep(ms);
53}
54
55/* Data to handle a single periodic alarm */
56static int timer_alive = 0;
57static SDL_Thread *timer = NULL;
58
59static 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 */
71int 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
80void SDL_SYS_TimerQuit(void)
81{
82	timer_alive = 0;
83	if ( timer ) {
84		SDL_WaitThread(timer, NULL);
85		timer = NULL;
86	}
87}
88
89int SDL_SYS_StartTimer(void)
90{
91	SDL_SetError("Internal logic error: DC uses threaded timer");
92	return(-1);
93}
94
95void SDL_SYS_StopTimer(void)
96{
97	return;
98}
99
100#endif /* SDL_TIMER_DC */
101