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// Copyright 2017 The Dawn Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef COMMON_REFCOUNTED_H_
#define COMMON_REFCOUNTED_H_
#include "common/RefBase.h"
#include <atomic>
#include <cstdint>
class RefCounted {
public:
RefCounted(uint64_t payload = 0);
uint64_t GetRefCountForTesting() const;
uint64_t GetRefCountPayload() const;
void Reference();
void Release();
void APIReference();
void APIRelease();
protected:
virtual ~RefCounted() = default;
// A Derived class may override this if they require a custom deleter.
virtual void DeleteThis();
private:
std::atomic<uint64_t> mRefCount;
};
template <typename T>
struct RefCountedTraits {
static constexpr T* kNullValue = nullptr;
static void Reference(T* value) {
value->Reference();
}
static void Release(T* value) {
value->Release();
}
};
template <typename T>
class Ref : public RefBase<T*, RefCountedTraits<T>> {
public:
using RefBase<T*, RefCountedTraits<T>>::RefBase;
};
template <typename T>
Ref<T> AcquireRef(T* pointee) {
Ref<T> ref;
ref.Acquire(pointee);
return ref;
}
#endif // COMMON_REFCOUNTED_H_