int prTempoClock_Sched(struct VMGlobals *g, int numArgsPushed)
{
PyrSlot *a = g->sp - 2;
PyrSlot *b = g->sp - 1;
PyrSlot *c = g->sp;
double delta, beats;
int err;
TempoClock *clock = (TempoClock*)slotRawPtr(&slotRawObject(a)->slots[1]);
if (!clock) {
error("clock is not running.\n");
return errFailed;
}
if (!SlotEq(&g->thread->clock, a)) {
beats = clock->ElapsedBeats();
//post("shouldn't call TempoClock-sched from a different clock. Use schedAbs.\n");
//return errFailed;
} else {
err = slotDoubleVal(&g->thread->beats, &beats);
if (err) return errNone; // return nil OK, just don't schedule
}
err = slotDoubleVal(b, &delta);
if (err) return errNone; // return nil OK, just don't schedule
beats += delta;
if (beats == dInfinity)
return errNone; // return nil OK, just don't schedule
clock->Add(beats, c);
return errNone;
}
bool identDict_lookupNonNil(PyrObject *dict, PyrSlot *key, int hash, PyrSlot *result)
{
again:
PyrSlot *dictslots = dict->slots;
PyrSlot *arraySlot = dictslots + ivxIdentDict_array;
if (isKindOfSlot(arraySlot, class_array)) {
PyrObject *array = slotRawObject(arraySlot);
int index = arrayAtIdentityHashInPairsWithHash(array, key, hash);
if (SlotEq(key, array->slots + index)) {
slotCopy(result,&array->slots[index + 1]);
return true;
}
}
PyrClass *identDictClass = s_identitydictionary->u.classobj;
PyrSlot *parentSlot = dictslots + ivxIdentDict_parent;
PyrSlot * protoSlot = dictslots + ivxIdentDict_proto;
if (isKindOfSlot(parentSlot, identDictClass)) {
if (isKindOfSlot(protoSlot, identDictClass)) {
// recursive call.
if (identDict_lookupNonNil(slotRawObject(protoSlot), key, hash, result)) return true;
}
dict = slotRawObject(parentSlot);
goto again; // tail call
} else {
if (isKindOfSlot(protoSlot, identDictClass)) {
dict = slotRawObject(protoSlot);
goto again; // tail call
}
}
return false;
}
int arrayAtIdentityHashInPairsWithHash(PyrObject *array, PyrSlot *key, int hash)
{
PyrSlot *slots, *test;
unsigned int i, start, end, maxHash;
maxHash = array->size >> 1;
start = (hash % maxHash) << 1;
end = array->size;
slots = array->slots;
for (i=start; i<end; i+=2) {
test = slots + i;
if (IsNil(test) || SlotEq(test, key))
return i;
}
end = start - 2;
for (i=0; i<=end; i+=2) {
test = slots + i;
if (IsNil(test) || SlotEq(test, key))
return i;
}
return -2;
}
int arrayAtIdentityHash(PyrObject *array, PyrSlot *key)
{
PyrSlot *slots, *test;
unsigned int i, start, end, hash, maxHash;
hash = calcHash(key);
maxHash = array->size;
start = hash % maxHash;
end = array->size;
slots = array->slots;
for (i=start; i<end; i++) {
test = slots + i;
if (IsNil(test) || SlotEq(test, key))
return i;
}
end = start - 1;
for (i=0; i<=end; i++) {
test = slots + i;
if (IsNil(test) || SlotEq(test, key))
return i;
}
return -1;
}
int prTempoClock_Beats(struct VMGlobals *g, int numArgsPushed)
{
PyrSlot *a = g->sp;
double beats, seconds;
if (SlotEq(&g->thread->clock, a)) {
int err = slotDoubleVal(&g->thread->beats, &beats);
if (err) return errWrongType;
} else {
TempoClock *clock = (TempoClock*)slotRawPtr(&slotRawObject(a)->slots[1]);
if (!clock) {
error("clock is not running.\n");
return errFailed;
}
int err = slotDoubleVal(&g->thread->seconds, &seconds);
if (err) return errWrongType;
beats = clock->SecsToBeats(seconds);
}
SetFloat(a, beats);
return errNone;
}