97 lines
2.0 KiB
C
97 lines
2.0 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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* These are best for low-frequency events. Having too many of them,
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* or using them for events that occur too frequently, can cause massive
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* slowdown.
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*
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* Copyright 1995-1998 Bernd Schmidt
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* Copyright 2004-2005 Richard Drummond
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*/
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#include "sysconfig.h"
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#include "sysdeps.h"
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#include "options.h"
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#include "events.h"
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#include "custom.h"
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#include "cia.h"
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#include "blitter.h"
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#include "disk.h"
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#include "audio.h"
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#include "hrtimer.h"
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/* Current time in cycles */
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unsigned long currcycle;
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/* Cycles to next event pending */
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unsigned long nextevent;
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#ifdef JIT
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/* For faster cycles handling */
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signed long pissoff = 0;
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#endif
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struct ev eventtab[ev_max];
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void init_eventtab (void)
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{
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int i;
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nextevent = 0;
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set_cycles (0);
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for (i = 0; i < ev_max; i++) {
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eventtab[i].active = 0;
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eventtab[i].oldcycles = 0;
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}
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eventtab[ev_cia].handler = CIA_handler;
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eventtab[ev_hsync].handler = hsync_handler;
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eventtab[ev_hsync].evtime = get_cycles () + HSYNCTIME;
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eventtab[ev_hsync].active = 1;
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eventtab[ev_copper].handler = copper_handler;
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eventtab[ev_copper].active = 0;
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eventtab[ev_blitter].handler = blitter_handler;
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eventtab[ev_blitter].active = 0;
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eventtab[ev_disk].handler = DISK_handler;
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eventtab[ev_disk].active = 0;
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eventtab[ev_audio].handler = audio_evhandler;
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eventtab[ev_audio].active = 0;
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events_schedule ();
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}
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/*
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* Determine next event pending
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*/
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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 - currcycle;
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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 = currcycle + mintime;
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}
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/*
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* Handle all events due at current time
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*/
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void handle_active_events (void)
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{
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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 == currcycle) {
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(*eventtab[i].handler)();
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}
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}
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}
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