| // 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_ |