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// Copyright 2023 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 SRC_DAWN_COMMON_REF_H_
#define SRC_DAWN_COMMON_REF_H_
#include <mutex>
#include "dawn/common/RefBase.h"
#include "dawn/common/RefCounted.h"
namespace dawn {
template <typename T>
class WeakRef;
namespace detail {
class WeakRefSupportBase;
template <typename T>
struct RefCountedTraits {
static constexpr T* kNullValue = nullptr;
static void Reference(T* value) { value->Reference(); }
static void Release(T* value) { value->Release(); }
};
} // namespace detail
template <typename T>
class Ref : public RefBase<T*, detail::RefCountedTraits<T>> {
public:
using RefBase<T*, detail::RefCountedTraits<T>>::RefBase;
};
template <typename T>
Ref<T> AcquireRef(T* pointee) {
Ref<T> ref;
ref.Acquire(pointee);
return ref;
}
template <typename T>
struct UnwrapRef {
using type = T;
};
template <typename T>
struct UnwrapRef<Ref<T>> {
using type = T;
};
template <typename T>
struct IsRef {
static constexpr bool value = false;
};
template <typename T>
struct IsRef<Ref<T>> {
static constexpr bool value = true;
};
} // namespace dawn
#endif // SRC_DAWN_COMMON_REF_H_