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This patch implements the template class ConcurrentCache which will be used to implement all the thread-safe object caches in Dawn (e.g. PipelineLayout, ComputePipeline and RenderPipeline). BUG=dawn:529 TEST=dawn_unittests Change-Id: Ia6f75191110a93285bdb23fdc1d275444d1ee866 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/67760 Reviewed-by: Corentin Wallez <cwallez@chromium.org> Reviewed-by: Austin Eng <enga@chromium.org> Commit-Queue: Jiawei Shao <jiawei.shao@intel.com>
55 lines
1.5 KiB
C++
55 lines
1.5 KiB
C++
// Copyright 2021 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_CONCURRENT_CACHE_H_
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#define COMMON_CONCURRENT_CACHE_H_
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#include "common/NonCopyable.h"
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#include <mutex>
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#include <unordered_set>
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#include <utility>
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template <typename T>
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class ConcurrentCache : public NonMovable {
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public:
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ConcurrentCache() = default;
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T* Find(T* object) {
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std::lock_guard<std::mutex> lock(mMutex);
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auto iter = mCache.find(object);
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if (iter == mCache.end()) {
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return nullptr;
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}
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return *iter;
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}
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std::pair<T*, bool> Insert(T* object) {
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std::lock_guard<std::mutex> lock(mMutex);
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auto insertion = mCache.insert(object);
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return std::make_pair(*(insertion.first), insertion.second);
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}
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size_t Erase(T* object) {
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std::lock_guard<std::mutex> lock(mMutex);
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return mCache.erase(object);
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}
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private:
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std::mutex mMutex;
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std::unordered_set<T*, typename T::HashFunc, typename T::EqualityFunc> mCache;
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};
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#endif
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