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Core: Manage next event internally to mTiming

This commit is contained in:
Jeffrey Pfau 2016-09-24 11:04:20 -07:00
parent a506f6cd9d
commit 4680a767c6
4 changed files with 16 additions and 10 deletions
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10
src/core/timing.c
View File

@ -7,10 +7,11 @@
DEFINE_VECTOR(mTimingEventList, struct mTimingEvent*);
void mTimingInit(struct mTiming* timing, int32_t* relativeCycles) {
void mTimingInit(struct mTiming* timing, int32_t* relativeCycles, int32_t* nextEvent) {
mTimingEventListInit(&timing->events, 0);
timing->masterCycles = 0;
timing->relativeCycles = relativeCycles;
timing->nextEvent = nextEvent;
}
void mTimingDeinit(struct mTiming* timing) {
@ -23,7 +24,11 @@ void mTimingClear(struct mTiming* timing) {
}
void mTimingSchedule(struct mTiming* timing, struct mTimingEvent* event, int32_t when) {
event->when = when + timing->masterCycles + *timing->relativeCycles;
int32_t nextEvent = when + *timing->relativeCycles;
event->when = nextEvent + timing->masterCycles;
if (nextEvent < *timing->nextEvent) {
*timing->nextEvent = nextEvent;
}
size_t e;
for (e = 0; e < mTimingEventListSize(&timing->events); ++e) {
struct mTimingEvent* next = *mTimingEventListGetPointer(&timing->events, e);
@ -54,6 +59,7 @@ void mTimingTick(struct mTiming* timing, int32_t cycles) {
struct mTimingEvent* next = *mTimingEventListGetPointer(&timing->events, 0);
int32_t nextWhen = next->when - timing->masterCycles;
if (nextWhen > 0) {
*timing->nextEvent = nextWhen;
return;
}
mTimingEventListShift(&timing->events, 0, 1);

3
src/core/timing.h
View File

@ -24,9 +24,10 @@ struct mTiming {
uint32_t masterCycles;
int32_t* relativeCycles;
int32_t* nextEvent;
};
void mTimingInit(struct mTiming* timing, int32_t* relativeCycles);
void mTimingInit(struct mTiming* timing, int32_t* relativeCycles, int32_t* nextEvent);
void mTimingDeinit(struct mTiming* timing);
void mTimingClear(struct mTiming* timing);
void mTimingSchedule(struct mTiming* timing, struct mTimingEvent*, int32_t when);

2
src/gb/gb.c
View File

@ -83,7 +83,7 @@ static void GBInit(void* cpu, struct mCPUComponent* component) {
gb->coreCallbacks = NULL;
gb->stream = NULL;
mTimingInit(&gb->timing, &gb->cpu->cycles);
mTimingInit(&gb->timing, &gb->cpu->cycles, &gb->cpu->nextEvent);
}
static void GBDeinit(struct mCPUComponent* component) {

11
src/gba/gba.c
View File

@ -112,7 +112,7 @@ static void GBAInit(void* cpu, struct mCPUComponent* component) {
gba->pristineRomSize = 0;
gba->yankedRomSize = 0;
mTimingInit(&gba->timing, &gba->cpu->cycles);
mTimingInit(&gba->timing, &gba->cpu->cycles, &gba->cpu->nextEvent);
}
void GBAUnloadROM(struct GBA* gba) {
@ -188,6 +188,7 @@ void GBAReset(struct ARMCore* cpu) {
gba->memory.romMask = toPow2(gba->memory.romSize) - 1;
gba->yankedRomSize = 0;
}
mTimingClear(&gba->timing);
GBAMemoryReset(gba);
GBAVideoReset(&gba->video);
GBAAudioReset(&gba->audio);
@ -235,10 +236,11 @@ static void GBAProcessEvents(struct ARMCore* cpu) {
do {
int32_t cycles = cpu->nextEvent;
int32_t nextEvent = INT_MAX;
int32_t nextEvent;
int32_t testEvent;
cpu->cycles -= cycles;
cpu->nextEvent = INT_MAX;
#ifndef NDEBUG
if (cycles < 0) {
@ -247,10 +249,7 @@ static void GBAProcessEvents(struct ARMCore* cpu) {
#endif
mTimingTick(&gba->timing, cycles);
testEvent = mTimingNextEvent(&gba->timing);
if (testEvent < nextEvent) {
nextEvent = testEvent;
}
nextEvent = cpu->nextEvent;
testEvent = GBAVideoProcessEvents(&gba->video, cycles);
if (testEvent < nextEvent) {