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/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrProgramElement.h"
#include "GrGpuResourceRef.h"
uint32_t GrProgramElement::CreateUniqueID() {
static int32_t gUniqueID = SK_InvalidUniqueID;
uint32_t id;
do {
id = static_cast<uint32_t>(sk_atomic_inc(&gUniqueID) + 1);
} while (id == SK_InvalidUniqueID);
return id;
}
void GrProgramElement::convertRefToPendingExecution() const {
// This function makes it so that all the GrGpuResourceRefs own a single ref to their
// underlying GrGpuResource if there are any refs to the GrProgramElement and a single
// pending read/write if there are any pending executions of the GrProgramElement. The
// GrGpuResourceRef will give up its single ref and/or pending read/write in its destructor.
SkASSERT(fRefCnt > 0);
if (0 == fPendingExecutions) {
for (int i = 0; i < fGpuResources.count(); ++i) {
fGpuResources[i]->markPendingIO();
}
}
++fPendingExecutions;
this->unref();
if (0 == fRefCnt) {
this->removeRefs();
}
}
void GrProgramElement::completedExecution() const {
this->validate();
--fPendingExecutions;
if (0 == fPendingExecutions) {
if (0 == fRefCnt) {
SkDELETE(this);
} else {
// Now our pending executions have ocurred and we still have refs. Convert
// ownership of our resources back to regular refs.
for (int i = 0; i < fGpuResources.count(); ++i) {
fGpuResources[i]->pendingIOComplete();
}
}
}
}
void GrProgramElement::removeRefs() const {
for (int i = 0; i < fGpuResources.count(); ++i) {
fGpuResources[i]->removeRef();
}
}
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