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71 lines
1.6 KiB
71 lines
1.6 KiB
/*
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* Copyright 2020 The Android Open Source Project
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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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*/
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#pragma once
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#include <log/log.h>
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#include <condition_variable>
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#include <functional>
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#include <future>
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#include <mutex>
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#include <queue>
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namespace android {
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namespace renderengine {
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namespace skia {
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namespace {
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#define PREVENT_COPY_AND_ASSIGN(Type) \
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private: \
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Type(const Type&) = delete; \
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void operator=(const Type&) = delete
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} // namespace
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/**
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* Shamelessly copied from HWUI to execute Skia Capturing on the back thread in
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* a safe manner.
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*/
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class CommonPool {
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PREVENT_COPY_AND_ASSIGN(CommonPool);
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public:
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using Task = std::function<void()>;
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static constexpr auto THREAD_COUNT = 2;
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static constexpr auto QUEUE_SIZE = 128;
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static void post(Task&& func);
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private:
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static CommonPool& instance();
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CommonPool();
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~CommonPool() {}
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void enqueue(Task&&);
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void workerLoop();
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std::mutex mLock;
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std::condition_variable mCondition;
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int mWaitingThreads = 0;
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std::queue<Task> mWorkQueue;
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};
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} // namespace skia
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} // namespace renderengine
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} // namespace android
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