SDL_systimer.cpp
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/*
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)
*/
#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)
{
Uint32 ms;
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: Epoc uses threaded timer");
return(-1);
}
void SDL_SYS_StopTimer(void)
{
return;
}
}; // extern "C"