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Rewrote timer code.

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The new code is based on timestamps, rather than delays. This eliminates the
need to update every timer in timer_process(), which cost a non-trivial amount
of CPU time on low-end machines.

This involved changes to every user of the timer code, so this change almost
certainly introduces bugs.
This commit is contained in:
SarahW 2018-08-02 22:06:10 +01:00
commit a7d006b637
79 changed files with 1050 additions and 1033 deletions
Download patch file Download diff file Expand all files Collapse all files

13
src/vid_pcjr.c
View file

@ -36,7 +36,8 @@ typedef struct pcjr_t
int vsynctime, vadj;
uint16_t ma, maback;
int dispontime, dispofftime, vidtime;
uint64_t dispontime, dispofftime;
pc_timer_t timer;
int firstline, lastline;
int composite;
@ -168,8 +169,8 @@ void pcjr_recalctimings(pcjr_t *pcjr)
_dispofftime = disptime - _dispontime;
_dispontime *= CGACONST;
_dispofftime *= CGACONST;
pcjr->dispontime = (int)(_dispontime * (1 << TIMER_SHIFT));
pcjr->dispofftime = (int)(_dispofftime * (1 << TIMER_SHIFT));
pcjr->dispontime = (uint64_t)_dispontime;
pcjr->dispofftime = (uint64_t)_dispofftime;
}
void pcjr_poll(void *p)
@ -189,7 +190,7 @@ void pcjr_poll(void *p)
{
// cgapal[0]=pcjr->col&15;
// printf("Firstline %i Lastline %i pcjr->displine %i\n",firstline,lastline,pcjr->displine);
pcjr->vidtime += pcjr->dispofftime;
timer_advance_u64(&pcjr->timer, pcjr->dispofftime);
pcjr->stat &= ~1;
pcjr->linepos = 1;
oldsc = pcjr->sc;
@ -435,7 +436,7 @@ void pcjr_poll(void *p)
}
else
{
pcjr->vidtime += pcjr->dispontime;
timer_advance_u64(&pcjr->timer, pcjr->dispontime);
if (pcjr->dispon)
pcjr->stat |= 1;
pcjr->linepos = 0;
@ -552,7 +553,7 @@ static void *pcjr_video_init()
pcjr->memctrl = -1;
timer_add(pcjr_poll, &pcjr->vidtime, TIMER_ALWAYS_ENABLED, pcjr);
timer_add(&pcjr->timer, pcjr_poll, pcjr, 1);
mem_mapping_add(&pcjr->mapping, 0xb8000, 0x08000, pcjr_read, NULL, NULL, pcjr_write, NULL, NULL, NULL, 0, pcjr);
io_sethandler(0x03d0, 0x0010, pcjr_in, NULL, NULL, pcjr_out, NULL, NULL, pcjr);
return pcjr;