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/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2006 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
*/
#include "SDL_config.h"
#ifdef SDL_TIMER_AMIGA
#include <stdio.h>
#include <time.h>
#include <signal.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <exec/types.h>
#ifdef __SASC
#include <proto/dos.h>
#include <clib/graphics_protos.h>
#include <pragmas/graphics.h>
#include <clib/exec_protos.h>
#include <pragmas/exec.h>
#elif defined(STORMC4_WOS)
#include <proto/dos.h>
#include <proto/exec.h>
#include <proto/graphics.h>
#else
#include <inline/dos.h>
#include <inline/exec.h>
#include <inline/graphics.h>
#endif
#include "mydebug.h"
extern struct DosLibrary *DOSBase;
extern struct ExecBase *SysBase;
static struct GfxBase *GfxBase;
#include "SDL_timer.h"
#include "../SDL_timer_c.h"
/* The first ticks value of the application */
#if !defined(__PPC__) || defined(STORMC4_WOS) || defined(MORPHOS)
static clock_t start;
void SDL_StartTicks(void)
{
/* Set first ticks value */
start=clock();
}
Uint32 SDL_GetTicks (void)
{
clock_t ticks;
ticks=clock()-start;
#ifdef __SASC
// CLOCKS_PER_SEC == 1000 !
return(ticks);
#else
// CLOCKS_PER_SEC != 1000 !
return ticks*(1000/CLOCKS_PER_SEC);
#endif
}
void SDL_Delay (Uint32 ms)
{
// Do a busy wait if time is less than 50ms
if(ms<50)
{
clock_t to_wait=clock();
#ifndef __SASC
ms*=(CLOCKS_PER_SEC/1000);
#endif
to_wait+=ms;
while(clock()<to_wait);
}
else
{
Delay(ms/20);
}
}
#else
ULONG MY_CLOCKS_PER_SEC;
void PPC_TimerInit(void);
APTR MyTimer;
ULONG start[2];
void SDL_StartTicks(void)
{
/* Set first ticks value */
if(!MyTimer)
PPC_TimerInit();
PPCGetTimerObject(MyTimer,PPCTIMERTAG_CURRENTTICKS,start);
start[1]>>=10;
start[1]|=((result[0]&0x3ff)<<22);
start[0]>>=10;
}
Uint32 SDL_GetTicks (void)
{
ULONG result[2];
PPCGetTimerObject(MyTimer,PPCTIMERTAG_CURRENTTICKS,result);
// PPCAsr64p(result,10);
// Non va, la emulo:
result[1]>>=10;
result[1]|=((result[0]&0x3ff)<<22);
// Non mi interessa piu' result[0]
return result[1]*1000/MY_CLOCKS_PER_SEC;
}
void SDL_Delay (Uint32 ms)
{
// Do a busy wait if time is less than 50ms
if(ms<50)
{
ULONG to_wait[2],actual[2];
PPCGetTimerObject(MyTimer,PPCTIMERTAG_CURRENTTICKS,result);
actual[1]=0;
to_wait[1]+=ms*1000/MY_CLOCKS_PER_SEC;
while(actual[1]<to_wait[1])
{
PPCGetTimerObject(MyTimer,PPCTIMERTAG_CURRENTTICKS,actual);
}
}
else
{
Delay(ms/50);
}
}
void PPC_TimerInit(void)
{
struct TagItem tags[]=
{
PPCTIMERTAG_CPU,TRUE,
TAG_DONE,0
};
if(MyTimer=PPCCreateTimerObject(tags))
{
ULONG result[2];
PPCGetTimerObject(MyTimer,PPCTIMERTAG_TICKSPERSEC,result);
D(bug("Timer inizializzato, TPS: %lu - %lu\n",result[0],result[1]));
// PPCAsr64p(result,10);
result[1]>>=10;
result[1]|=((result[0]&0x3ff)<<22);
result[0]>>=10;
D(bug("Shiftato TPS: %lu - %lu\n",result[0],result[1]));
MY_CLOCKS_PER_SEC=result[1];
PPCGetTimerObject(MyTimer,PPCTIMERTAG_CURRENTTICKS,result);
D(bug("Current ticks: %lu - %lu\n",result[0],result[1]));
result[1]>>=10;
result[1]|=((result[0]&0x3ff)<<22);
result[0]>>=10;
// PPCAsr64p(result,10);
D(bug("Shiftato: %lu - %lu\n",result[0],result[1]));
}
else
{
D(bug("Errore nell'inizializzazione del timer!\n"));
}
}
#endif
#include "SDL_thread.h"
/* Data to handle a single periodic alarm */
static int timer_alive = 0;
static SDL_Thread *timer_thread = NULL;
static int RunTimer(void *unused)
{
D(bug("SYSTimer: Entering RunTimer loop..."));
if(GfxBase==NULL)
GfxBase=(struct GfxBase *)OpenLibrary("graphics.library",37);
while ( timer_alive ) {
if ( SDL_timer_running ) {
SDL_ThreadedTimerCheck();
}
if(GfxBase)
WaitTOF(); // Check the timer every fifth of seconds. Was SDL_Delay(1)->BusyWait!
else
Delay(1);
}
D(bug("SYSTimer: EXITING RunTimer loop..."));
return(0);
}
/* This is only called if the event thread is not running */
int SDL_SYS_TimerInit(void)
{
D(bug("Creating thread for the timer (NOITIMER)...\n"));
timer_alive = 1;
timer_thread = SDL_CreateThread(RunTimer, NULL);
if ( timer_thread == NULL )
{
D(bug("Creazione del thread fallita...\n"));
return(-1);
}
return(SDL_SetTimerThreaded(1));
}
void SDL_SYS_TimerQuit(void)
{
timer_alive = 0;
if ( timer_thread ) {
SDL_WaitThread(timer_thread, NULL);
timer_thread = NULL;
}
}
int SDL_SYS_StartTimer(void)
{
SDL_SetError("Internal logic error: AmigaOS uses threaded timer");
return(-1);
}
void SDL_SYS_StopTimer(void)
{
return;
}
#endif /* SDL_TIMER_AMIGA */
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