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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.
*/
#ifndef GrPendingIOResource_DEFINED
#define GrPendingIOResource_DEFINED
#include "GrGpuResource.h"
#include "SkNoncopyable.h"
#include "SkRefCnt.h"
/**
* Helper for owning a pending read, write, read-write on a GrGpuResource. It never owns a regular
* ref.
*/
template <typename T, GrIOType IO_TYPE>
class GrPendingIOResource : SkNoncopyable {
public:
GrPendingIOResource(T* resource = nullptr) : fResource(nullptr) { this->reset(resource); }
GrPendingIOResource(const GrPendingIOResource& that) : GrPendingIOResource(that.get()) {}
void reset(T* resource = nullptr) {
if (resource) {
switch (IO_TYPE) {
case kRead_GrIOType:
resource->addPendingRead();
break;
case kWrite_GrIOType:
resource->addPendingWrite();
break;
case kRW_GrIOType:
resource->addPendingRead();
resource->addPendingWrite();
break;
}
}
this->release();
fResource = resource;
}
~GrPendingIOResource() { this->release(); }
explicit operator bool() const { return SkToBool(fResource); }
bool operator==(const GrPendingIOResource& other) const { return fResource == other.fResource; }
T* get() const { return fResource; }
private:
void release() {
if (fResource) {
switch (IO_TYPE) {
case kRead_GrIOType:
fResource->completedRead();
break;
case kWrite_GrIOType:
fResource->completedWrite();
break;
case kRW_GrIOType:
fResource->completedRead();
fResource->completedWrite();
break;
}
}
}
T* fResource;
};
#endif
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