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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 "GrGpuResourceRef.h"
#include "GrGpuResource.h"
GrGpuResourceRef::GrGpuResourceRef() {
fResource = NULL;
fOwnRef = false;
fPendingIO = false;
fIOType = kNone_IOType;
}
GrGpuResourceRef::GrGpuResourceRef(GrGpuResource* resource, IOType ioType) {
fResource = NULL;
fOwnRef = false;
fPendingIO = false;
this->setResource(resource, ioType);
}
GrGpuResourceRef::~GrGpuResourceRef() {
if (fOwnRef) {
SkASSERT(fResource);
fResource->unref();
}
if (fPendingIO) {
switch (fIOType) {
case kNone_IOType:
SkFAIL("Shouldn't get here if fIOType is kNone.");
break;
case kRead_IOType:
fResource->completedRead();
break;
case kWrite_IOType:
fResource->completedWrite();
break;
case kRW_IOType:
fResource->completedRead();
fResource->completedWrite();
break;
}
}
}
void GrGpuResourceRef::reset() {
SkASSERT(!fPendingIO);
SkASSERT(SkToBool(fResource) == fOwnRef);
if (fOwnRef) {
fResource->unref();
fOwnRef = false;
fResource = NULL;
fIOType = kNone_IOType;
}
}
void GrGpuResourceRef::setResource(GrGpuResource* resource, IOType ioType) {
SkASSERT(!fPendingIO);
SkASSERT(SkToBool(fResource) == fOwnRef);
SkSafeUnref(fResource);
if (NULL == resource) {
fResource = NULL;
fOwnRef = false;
fIOType = kNone_IOType;
} else {
SkASSERT(kNone_IOType != ioType);
fResource = resource;
fOwnRef = true;
fIOType = ioType;
}
}
void GrGpuResourceRef::markPendingIO() const {
// This should only be called when the owning GrProgramElement gets its first
// pendingExecution ref.
SkASSERT(!fPendingIO);
SkASSERT(fResource);
fPendingIO = true;
switch (fIOType) {
case kNone_IOType:
SkFAIL("GrGpuResourceRef with neither reads nor writes?");
break;
case kRead_IOType:
fResource->addPendingRead();
break;
case kWrite_IOType:
fResource->addPendingWrite();
break;
case kRW_IOType:
fResource->addPendingRead();
fResource->addPendingWrite();
break;
}
}
void GrGpuResourceRef::pendingIOComplete() const {
// This should only be called when the owner's pending executions have ocurred but it is still
// reffed.
SkASSERT(fOwnRef);
SkASSERT(fPendingIO);
switch (fIOType) {
case kNone_IOType:
SkFAIL("GrGpuResourceRef with neither reads nor writes?");
break;
case kRead_IOType:
fResource->completedRead();
break;
case kWrite_IOType:
fResource->completedWrite();
break;
case kRW_IOType:
fResource->completedRead();
fResource->completedWrite();
break;
}
fPendingIO = false;
}
void GrGpuResourceRef::removeRef() const {
// This should only be called once, when the owners last ref goes away and
// there is a pending execution.
SkASSERT(fOwnRef);
SkASSERT(fPendingIO);
SkASSERT(kNone_IOType != fIOType);
SkASSERT(fResource);
fResource->unref();
fOwnRef = false;
}
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