kopia lustrzana https://github.com/Jean-MarcHarvengt/MCUME
103 wiersze
2.1 KiB
C
103 wiersze
2.1 KiB
C
/*
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* UAE - The Un*x Amiga Emulator
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*
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* Events
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*
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* Note that this file must be included after sound.h and sounddep/sound.h,
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* since DONT_WANT_SOUND can get overridden in those.
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*
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* Copyright 1995, 1996, 1997 Bernd Schmidt
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*/
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extern unsigned long int cycles, nextevent, is_lastline;
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extern unsigned long int sample_evtime;
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typedef void (*evfunc)(void);
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struct ev
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{
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int active;
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unsigned long int evtime, oldcycles;
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evfunc handler;
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};
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enum {
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ev_hsync, ev_copper, ev_cia,
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ev_blitter, ev_diskblk, ev_diskindex, ev_disksync,
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#ifndef DONT_WANT_SOUND
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ev_aud0, ev_aud1, ev_aud2, ev_aud3,
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ev_sample,
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#endif
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ev_max
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};
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extern struct ev eventtab[ev_max];
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static __inline__ void events_schedule(void)
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{
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int i;
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unsigned long int mintime = ~0L;
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for(i = 0; i < ev_max; i++) {
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if (eventtab[i].active) {
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unsigned long int eventtime = eventtab[i].evtime - cycles;
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if (eventtime < mintime)
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mintime = eventtime;
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}
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}
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nextevent = cycles + mintime;
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}
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static __inline__ void do_cycles_slow(void)
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{
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#ifdef FRAME_RATE_HACK
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if (is_lastline && eventtab[ev_hsync].evtime-cycles <= M68K_SPEED
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&& (long int)(read_processor_time () - vsyncmintime) < 0)
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return;
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#endif
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if ((nextevent - cycles) <= M68K_SPEED) {
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int j;
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for(j = 0; j < M68K_SPEED; j++) {
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if (++cycles == nextevent) {
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int i;
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for(i = 0; i < ev_max; i++) {
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if (eventtab[i].active && eventtab[i].evtime == cycles) {
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(*eventtab[i].handler)();
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}
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}
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events_schedule();
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}
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}
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} else {
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cycles += M68K_SPEED;
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}
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}
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static __inline__ void do_cycles_fast(void)
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{
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#ifdef FRAME_RATE_HACK
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if (is_lastline && eventtab[ev_hsync].evtime-cycles <= 1
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&& (long int)(read_processor_time () - vsyncmintime) < 0)
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return;
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#endif
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cycles++;
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if (nextevent == cycles) {
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int i;
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for(i = 0; i < ev_max; i++) {
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if (eventtab[i].active && eventtab[i].evtime == cycles) {
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(*eventtab[i].handler)();
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}
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}
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events_schedule();
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}
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}
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#if M68K_SPEED == 1
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#define do_cycles do_cycles_fast
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#else
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#define do_cycles do_cycles_slow
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#endif
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