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https://github.com/encounter/dawn-cmake.git
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0055d95fa7
This makes refcounting of these objects more automatic to try and prevent leaks or use-after-frees in the future. Also removes operator* from RefBase (and Ref) because it is never used and cannot work in a normal way for ObjectiveC protocols that cannot be dereferenced. Bug: dawn:89 Change-Id: I2e3fbfd638e2ba76d8c563f30bc489a384152552 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/32161 Reviewed-by: Austin Eng <enga@chromium.org> Reviewed-by: Stephen White <senorblanco@chromium.org> Commit-Queue: Corentin Wallez <cwallez@chromium.org>
68 lines
1.6 KiB
C++
68 lines
1.6 KiB
C++
// Copyright 2017 The Dawn Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef COMMON_REFCOUNTED_H_
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#define COMMON_REFCOUNTED_H_
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#include "common/RefBase.h"
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#include <atomic>
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#include <cstdint>
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class RefCounted {
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public:
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RefCounted(uint64_t payload = 0);
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uint64_t GetRefCountForTesting() const;
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uint64_t GetRefCountPayload() const;
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// Dawn API
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void Reference();
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void Release();
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protected:
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virtual ~RefCounted() = default;
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// A Derived class may override this if they require a custom deleter.
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virtual void DeleteThis();
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private:
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std::atomic<uint64_t> mRefCount;
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};
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template <typename T>
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struct RefCountedTraits {
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static constexpr T* kNullValue = nullptr;
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static void Reference(T* value) {
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value->Reference();
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}
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static void Release(T* value) {
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value->Release();
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}
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};
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template <typename T>
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class Ref : public RefBase<T*, RefCountedTraits<T>> {
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public:
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using RefBase<T*, RefCountedTraits<T>>::RefBase;
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};
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template <typename T>
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Ref<T> AcquireRef(T* pointee) {
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Ref<T> ref;
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ref.Acquire(pointee);
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return ref;
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}
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#endif // COMMON_REFCOUNTED_H_
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