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