132 lines
2.7 KiB
C
132 lines
2.7 KiB
C
/*
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SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2012 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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Sam Lantinga
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slouken@libsdl.org
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*/
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#include <gint/gint.h>
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#include <gint/timer.h>
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#include <gint/mpu/tmu.h>
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#include "SDL_config.h"
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#ifdef SDL_TIMER_PRIZM
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#include "SDL_timer.h"
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#include "../SDL_timer_c.h"
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int timerID = -1;
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uint32_t timerTick = 0;
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uint32_t timerStart = 0;
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uint32_t volatile *Tcnt = NULL;
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static int callback(void)
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{
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return TIMER_CONTINUE;
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}
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void SDL_StartTicks(void)
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{
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timerID = timer_configure( TIMER_ETMU, 0xFFFFFFFF, GINT_CALL(callback));
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if (timerID!=-1)
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{
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timer_start(timerID);
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Tcnt = &SH7305_ETMU[timerID-3].TCNT;
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timerStart = *Tcnt;
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}
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}
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Uint32 SDL_GetTicks (void)
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{
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if (timerID!=-1)
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{
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timerTick = timerStart - *Tcnt;
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return (timerTick >> 5);
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}
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else return 0xFFFFFFFF;
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}
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void SDL_Delay (Uint32 ms)
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{
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if (timerID!=-1)
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{
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uint32_t timerTempStart = SDL_GetTicks();
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uint32_t currentTCNT;
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do
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{
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currentTCNT = SDL_GetTicks() - timerTempStart;
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}
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while(currentTCNT <= ms);
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}
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}
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#include "SDL_thread.h"
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/* Data to handle a single periodic alarm */
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static int timer_alive = 0;
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static SDL_Thread *timer = NULL;
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static int RunTimer(void *unused)
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{
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while ( timer_alive ) {
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if ( SDL_timer_running ) {
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SDL_ThreadedTimerCheck();
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}
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SDL_Delay(1);
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}
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return(0);
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}
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/* This is only called if the event thread is not running */
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int SDL_SYS_TimerInit(void)
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{
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timer_alive = 1;
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timer = SDL_CreateThread(RunTimer, NULL);
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if ( timer == NULL )
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return(-1);
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return(SDL_SetTimerThreaded(1));
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}
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void SDL_SYS_TimerQuit(void)
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{
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timer_alive = 0;
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if ( timer ) {
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SDL_WaitThread(timer, NULL);
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timer = NULL;
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}
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}
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int SDL_SYS_StartTimer(void)
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{
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//SDL_SetError("Timers not implemented on the TI-Nspire");
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return(-1);
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}
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void SDL_SYS_StopTimer(void)
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{
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return;
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}
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#endif /* SDL_TIMER_PRIZM */
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