1/*
2    SDL - Simple DirectMedia Layer
3    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002  Sam Lantinga
4
5    This library is free software; you can redistribute it and/or
6    modify it under the terms of the GNU Library General Public
7    License as published by the Free Software Foundation; either
8    version 2 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    Library General Public License for more details.
14
15    You should have received a copy of the GNU Library General Public
16    License along with this library; if not, write to the Free
17    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
18
19    Sam Lantinga
20    slouken@libsdl.org
21*/
22#include "SDL_config.h"
23
24#ifdef SDL_TIMER_EPOC
25
26/*
27    SDL_systimer.cpp
28
29    Epoc version by Hannu Viitala (hannu.j.viitala@mbnet.fi)
30*/
31
32#include <e32std.h>
33#include <e32hal.h>
34
35extern "C" {
36#include "SDL_error.h"
37#include "SDL_thread.h"
38#include "SDL_timer.h"
39#include "../SDL_timer_c.h"
40
41static TUint start = 0;
42static TInt tickPeriodMilliSeconds;
43
44
45void SDL_StartTicks(void)
46{
47	/* Set first ticks value */
48    start = User::TickCount();
49
50    TTimeIntervalMicroSeconds32 period;
51	TInt tmp = UserHal::TickPeriod(period);
52    tickPeriodMilliSeconds = period.Int() / 1000;
53}
54
55Uint32 SDL_GetTicks(void)
56{
57    TUint deltaTics = User::TickCount() - start;
58	return(deltaTics * tickPeriodMilliSeconds);
59}
60
61void SDL_Delay(Uint32 ms)
62{
63
64    User::After(TTimeIntervalMicroSeconds32(ms*1000));
65}
66
67/* Data to handle a single periodic alarm */
68static int timer_alive = 0;
69static SDL_Thread *timer = NULL;
70
71static int RunTimer(void *unused)
72{
73	Uint32 ms;
74
75	while ( timer_alive ) {
76		if ( SDL_timer_running ) {
77			SDL_ThreadedTimerCheck();
78		}
79		SDL_Delay(10);
80	}
81	return(0);
82}
83
84/* This is only called if the event thread is not running */
85int SDL_SYS_TimerInit(void)
86{
87	timer_alive = 1;
88	timer = SDL_CreateThread(RunTimer, NULL);
89	if ( timer == NULL )
90		return(-1);
91	return(SDL_SetTimerThreaded(1));
92}
93
94void SDL_SYS_TimerQuit(void)
95{
96	timer_alive = 0;
97	if ( timer ) {
98		SDL_WaitThread(timer, NULL);
99		timer = NULL;
100	}
101}
102
103int SDL_SYS_StartTimer(void)
104{
105	SDL_SetError("Internal logic error: Epoc uses threaded timer");
106	return(-1);
107}
108
109void SDL_SYS_StopTimer(void)
110{
111	return;
112}
113
114}; // extern "C"
115
116#endif /* SDL_TIMER_EPOC */
117