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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
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14
src/vid_wy700.c
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@ -190,8 +190,8 @@ typedef struct wy700_t
int enabled; /* Display enabled, 0 or 1 */
int detach; /* Detach cursor, 0 or 1 */
int dispontime, dispofftime;
int vidtime;
uint64_t dispontime, dispofftime;
pc_timer_t timer;
int linepos, displine;
int vc;
@ -490,8 +490,8 @@ void wy700_recalctimings(wy700_t *wy700)
_dispofftime = disptime - _dispontime;
_dispontime *= MDACONST;
_dispofftime *= MDACONST;
wy700->dispontime = (int)(_dispontime * (1 << TIMER_SHIFT));
wy700->dispofftime = (int)(_dispofftime * (1 << TIMER_SHIFT));
wy700->dispontime = (uint64_t)_dispontime;
wy700->dispofftime = (uint64_t)_dispofftime;
}
@ -759,7 +759,7 @@ void wy700_poll(void *p)
if (!wy700->linepos)
{
wy700->vidtime += wy700->dispofftime;
timer_advance_u64(&wy700->timer, wy700->dispofftime);
wy700->cga_stat |= 1;
wy700->mda_stat |= 1;
wy700->linepos = 1;
@ -820,7 +820,7 @@ void wy700_poll(void *p)
wy700->cga_stat &= ~1;
wy700->mda_stat &= ~1;
}
wy700->vidtime += wy700->dispontime;
timer_advance_u64(&wy700->timer, wy700->dispontime);
wy700->linepos = 0;
if (wy700->displine == 800)
@ -868,7 +868,7 @@ void *wy700_init()
/* 128k video RAM */
wy700->vram = malloc(0x20000);
timer_add(wy700_poll, &wy700->vidtime, TIMER_ALWAYS_ENABLED, wy700);
timer_add(&wy700->timer, wy700_poll, wy700, 1);
/* Occupy memory between 0xB0000 and 0xBFFFF (moves to 0xA0000 in
* high-resolution modes) */