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GBA SIO: Clean up lockstep cycle counting

This commit is contained in:
Vicki Pfau 2021-02-08 23:06:00 -08:00
parent 32a8a47de6
commit b92bb30a72
1 changed files with 9 additions and 19 deletions
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28
src/gba/sio/lockstep.c
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@ -149,11 +149,7 @@ bool GBASIOLockstepNodeUnload(struct GBASIODriver* driver) {
// Flush ongoing transfer
if (mTimingIsScheduled(&driver->p->p->timing, &node->event)) {
int oldWhen = node->event.when;
mTimingDeschedule(&driver->p->p->timing, &node->event);
mTimingSchedule(&driver->p->p->timing, &node->event, 0);
node->eventDiff -= oldWhen - node->event.when;
node->eventDiff -= node->event.when - mTimingCurrentTime(&driver->p->p->timing);
mTimingDeschedule(&driver->p->p->timing, &node->event);
}
@ -190,15 +186,11 @@ static uint16_t GBASIOLockstepNodeMultiWriteRegister(struct GBASIODriver* driver
ATOMIC_STORE(node->p->d.transferActive, TRANSFER_STARTING);
ATOMIC_STORE(node->p->d.transferCycles, GBASIOCyclesPerTransfer[GBASIOMultiplayerGetBaud(node->d.p->siocnt)][node->p->d.attached - 1]);
bool scheduled = mTimingIsScheduled(&driver->p->p->timing, &node->event);
int oldWhen = node->event.when;
mTimingDeschedule(&driver->p->p->timing, &node->event);
mTimingSchedule(&driver->p->p->timing, &node->event, 0);
if (scheduled) {
node->eventDiff -= oldWhen - node->event.when;
if (mTimingIsScheduled(&driver->p->p->timing, &node->event)) {
node->eventDiff -= node->event.when - mTimingCurrentTime(&driver->p->p->timing);
mTimingDeschedule(&driver->p->p->timing, &node->event);
}
mTimingSchedule(&driver->p->p->timing, &node->event, 0);
} else {
value &= ~0x0080;
}
@ -443,15 +435,13 @@ static uint32_t _slaveUpdate(struct GBASIOLockstepNode* node) {
static void _GBASIOLockstepNodeProcessEvents(struct mTiming* timing, void* user, uint32_t cyclesLate) {
struct GBASIOLockstepNode* node = user;
mLockstepLock(&node->p->d);
if (node->p->d.attached < 2) {
mTimingSchedule(timing, &node->event, GBASIOCyclesPerTransfer[GBASIOMultiplayerGetBaud(node->d.p->siocnt)][0]);
mLockstepUnlock(&node->p->d);
return;
}
int32_t cycles = 0;
node->nextEvent -= cyclesLate;
node->eventDiff += cyclesLate;
if (node->nextEvent <= 0) {
if (node->p->d.attached < 2) {
cycles = GBASIOCyclesPerTransfer[GBASIOMultiplayerGetBaud(node->d.p->siocnt)][0];
} else if (node->nextEvent <= 0) {
if (!node->id) {
cycles = _masterUpdate(node);
} else {