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- /* WARNING: This file was automatically generated!
- * Original: ./src/timer/amigaos/SDL_systimer.c
- */
- /*
- SDL - Simple DirectMedia Layer
- Copyright (C) 1997, 1998, 1999, 2000 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
- */
-
- #ifdef SAVE_RCSID
- static char rcsid =
- "@(#) $Id: SDL_systimer.c,v 1.1.2.5 2000/05/19 21:59:30 hercules Exp $";
- #endif
-
- #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>
- #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_error.h"
- #include "SDL_timer.h"
- #include "SDL_timer_c.h"
-
- #if defined(DISABLE_THREADS) || defined(FORK_HACK)
- #define USE_ITIMER
- #endif
-
- /* The first ticks value of the application */
-
- #ifndef __PPC__
- 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("Creo il thread per il timer (NOITMER)...\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;
- }
-