[sdl_omap.git] / src / timer / symbian / SDL_systimer.cpp

/*
    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 Library General Public
    License as published by the Free Software Foundation; either
    version 2 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
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public
    License along with this library; if not, write to the Free
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    Sam Lantinga
    slouken@devolution.com
*/

/*
    SDL_systimer.cpp

    Epoc version by Hannu Viitala (hannu.j.viitala@mbnet.fi) 
    Markus Mertama
*/

#include <e32std.h>
#include <e32hal.h>

extern "C" {
#include "SDL_error.h"
#include "SDL_thread.h"
#include "SDL_timer.h"
#include "SDL_timer_c.h"

static TUint start = 0;
static TInt tickPeriodMilliSeconds;


void SDL_StartTicks(void)
	{
	/* Set first ticks value */
    start = User::TickCount();

    TTimeIntervalMicroSeconds32 period;
	TInt tmp = UserHal::TickPeriod(period);
    tickPeriodMilliSeconds = period.Int() / 1000;
	}

Uint32 SDL_GetTicks(void)
	{
    TUint deltaTics = User::TickCount() - start;
	return(deltaTics * tickPeriodMilliSeconds); 
	}

void SDL_Delay(Uint32 ms)
	{     
    User::After(TTimeIntervalMicroSeconds32(ms*1000));
	}

/* 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)
	{
	if(timer != NULL)
		return (-1);
	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: Epoc uses threaded timer");
	return(-1);
	}

void SDL_SYS_StopTimer(void)
	{
	return;
	}

} // extern "C"
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 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@devolution.com
	21	*/
	22
	23	/*
	24	SDL_systimer.cpp
	25
	26	Epoc version by Hannu Viitala (hannu.j.viitala@mbnet.fi)
	27	Markus Mertama
	28	*/
	29
	30	#include <e32std.h>
	31	#include <e32hal.h>
	32
	33	extern "C" {
	34	#include "SDL_error.h"
	35	#include "SDL_thread.h"
	36	#include "SDL_timer.h"
	37	#include "SDL_timer_c.h"
	38
	39	static TUint start = 0;
	40	static TInt tickPeriodMilliSeconds;
	41
	42
	43	void SDL_StartTicks(void)
	44	{
	45	/* Set first ticks value */
	46	start = User::TickCount();
	47
	48	TTimeIntervalMicroSeconds32 period;
	49	TInt tmp = UserHal::TickPeriod(period);
	50	tickPeriodMilliSeconds = period.Int() / 1000;
	51	}
	52
	53	Uint32 SDL_GetTicks(void)
	54	{
	55	TUint deltaTics = User::TickCount() - start;
	56	return(deltaTics * tickPeriodMilliSeconds);
	57	}
	58
	59	void SDL_Delay(Uint32 ms)
	60	{
	61	User::After(TTimeIntervalMicroSeconds32(ms*1000));
	62	}
	63
	64	/* Data to handle a single periodic alarm */
65	static int timer_alive = 0;
66	static SDL_Thread *timer = NULL;
67
68	static int RunTimer(void *unused)
69	{
70	while ( timer_alive )
71	{
72	if (SDL_timer_running)
73	{
74	SDL_ThreadedTimerCheck();
75	}
76	SDL_Delay(10);
77	}
78	return(0);
79	}
80
81	/* This is only called if the event thread is not running */
82	int SDL_SYS_TimerInit(void)
83	{
84	if(timer != NULL)
85	return (-1);
86	timer_alive = 1;
87	timer = SDL_CreateThread(RunTimer, NULL);
88	if ( timer == NULL )
89	return(-1);
90	return(SDL_SetTimerThreaded(1));
91	}
92
93	void SDL_SYS_TimerQuit(void)
94	{
95	timer_alive = 0;
96	if ( timer )
97	{
98	SDL_WaitThread(timer, NULL);
99	timer = NULL;
100	}
101	}
102
103	int SDL_SYS_StartTimer(void)
104	{
105	SDL_SetError("Internal logic error: Epoc uses threaded timer");
106	return(-1);
107	}
108
109	void SDL_SYS_StopTimer(void)
110	{
111	return;
112	}
113
114	} // extern "C"