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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_hercules.c
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@ -17,8 +17,8 @@ typedef struct hercules_t
uint8_t ctrl, ctrl2, stat;
int dispontime, dispofftime;
int vidtime;
uint64_t dispontime, dispofftime;
pc_timer_t timer;
int firstline, lastline;
@ -110,8 +110,8 @@ void hercules_recalctimings(hercules_t *hercules)
_dispofftime = disptime - _dispontime;
_dispontime *= MDACONST;
_dispofftime *= MDACONST;
hercules->dispontime = (int)(_dispontime * (1 << TIMER_SHIFT));
hercules->dispofftime = (int)(_dispofftime * (1 << TIMER_SHIFT));
hercules->dispontime = (uint64_t)_dispontime;
hercules->dispofftime = (uint64_t)_dispofftime;
}
void hercules_poll(void *p)
@ -128,7 +128,7 @@ void hercules_poll(void *p)
if (!hercules->linepos)
{
//pclog("Poll %i %i\n",vc,sc);
hercules->vidtime += hercules->dispofftime;
timer_advance_u64(&hercules->timer, hercules->dispofftime);
hercules->stat |= 1;
hercules->linepos = 1;
oldsc = hercules->sc;
@ -199,7 +199,7 @@ void hercules_poll(void *p)
}
else
{
hercules->vidtime += hercules->dispontime;
timer_advance_u64(&hercules->timer, hercules->dispontime);
if (hercules->dispon)
hercules->stat &= ~1;
hercules->linepos = 0;
@ -314,7 +314,7 @@ void *hercules_init()
hercules->vram = malloc(0x10000);
timer_add(hercules_poll, &hercules->vidtime, TIMER_ALWAYS_ENABLED, hercules);
timer_add(&hercules->timer, hercules_poll, hercules, 1);
mem_mapping_add(&hercules->mapping, 0xb0000, 0x08000, hercules_read, NULL, NULL, hercules_write, NULL, NULL, NULL, MEM_MAPPING_EXTERNAL, hercules);
io_sethandler(0x03b0, 0x0010, hercules_in, NULL, NULL, hercules_out, NULL, NULL, hercules);