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75 lines
2.2 KiB
75 lines
2.2 KiB
7 months ago
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/*
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* Copyright 2019 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 <condition_variable>
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#include <mutex>
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#include <queue>
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#include <thread>
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#include <ui/GraphicBuffer.h>
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namespace android {
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namespace renderengine {
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namespace gl {
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class GLESRenderEngine;
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class ImageManager {
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public:
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struct Barrier {
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std::mutex mutex;
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std::condition_variable_any condition;
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bool isOpen GUARDED_BY(mutex) = false;
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status_t result GUARDED_BY(mutex) = NO_ERROR;
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};
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ImageManager(GLESRenderEngine* engine);
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~ImageManager();
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// Starts the background thread for the ImageManager
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// We need this to guarantee that the class is fully-constructed before the
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// thread begins running.
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void initThread();
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void cacheAsync(const sp<GraphicBuffer>& buffer, const std::shared_ptr<Barrier>& barrier)
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EXCLUDES(mMutex);
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status_t cache(const sp<GraphicBuffer>& buffer);
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void releaseAsync(uint64_t bufferId, const std::shared_ptr<Barrier>& barrier) EXCLUDES(mMutex);
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private:
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struct QueueEntry {
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enum class Operation { Delete, Insert };
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Operation op = Operation::Delete;
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sp<GraphicBuffer> buffer = nullptr;
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uint64_t bufferId = 0;
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std::shared_ptr<Barrier> barrier = nullptr;
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};
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void queueOperation(const QueueEntry&& entry);
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void threadMain();
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GLESRenderEngine* const mEngine;
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std::thread mThread;
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std::condition_variable_any mCondition;
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std::mutex mMutex;
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std::queue<QueueEntry> mQueue GUARDED_BY(mMutex);
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bool mRunning GUARDED_BY(mMutex) = true;
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};
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} // namespace gl
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} // namespace renderengine
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} // namespace android
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