/*

    SDL - Simple DirectMedia Layer

    Copyright (C) 1997, 1998, 1999, 2000, 2001  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"