cfd929dffd
This reverts commit 162305aaceca5f6cbaa03db1aa124f67e313612e. Adjusted tests to ensure they pass on cf_x86 Bug: 129250875 Test: this on cf_x86 & blueline Change-Id: Ic3245ec8db784ae356b7fa66dda9a2fc91c622ea
124 lines
3.2 KiB
C++
124 lines
3.2 KiB
C++
/*
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* Copyright (C) 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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#ifndef FRAMEWORKS_BASE_COMMONPOOL_H
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#define FRAMEWORKS_BASE_COMMONPOOL_H
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#include "utils/Macros.h"
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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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namespace android {
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namespace uirenderer {
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template <class T, int SIZE>
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class ArrayQueue {
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PREVENT_COPY_AND_ASSIGN(ArrayQueue);
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static_assert(SIZE > 0, "Size must be positive");
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public:
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ArrayQueue() = default;
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~ArrayQueue() = default;
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constexpr size_t capacity() const { return SIZE; }
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constexpr bool hasWork() const { return mHead != mTail; }
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constexpr bool hasSpace() const { return ((mHead + 1) % SIZE) != mTail; }
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constexpr int size() const {
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if (mHead > mTail) {
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return mHead - mTail;
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} else {
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return mTail - mHead + SIZE;
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}
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}
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constexpr void push(T&& t) {
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int newHead = (mHead + 1) % SIZE;
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LOG_ALWAYS_FATAL_IF(newHead == mTail, "no space");
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mBuffer[mHead] = std::move(t);
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mHead = newHead;
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}
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constexpr T pop() {
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LOG_ALWAYS_FATAL_IF(mTail == mHead, "empty");
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int index = mTail;
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mTail = (mTail + 1) % SIZE;
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T ret = std::move(mBuffer[index]);
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mBuffer[index] = nullptr;
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return ret;
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}
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private:
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T mBuffer[SIZE];
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int mHead = 0;
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int mTail = 0;
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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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template <class F>
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static auto async(F&& func) -> std::future<decltype(func())> {
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typedef std::packaged_task<decltype(func())()> task_t;
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auto task = std::make_shared<task_t>(std::forward<F>(func));
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post([task]() { std::invoke(*task); });
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return task->get_future();
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}
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template <class F>
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static auto runSync(F&& func) -> decltype(func()) {
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std::packaged_task<decltype(func())()> task{std::forward<F>(func)};
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post([&task]() { std::invoke(task); });
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return task.get_future().get();
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};
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// For testing purposes only, blocks until all worker threads are parked.
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static void waitForIdle();
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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 doWaitForIdle();
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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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ArrayQueue<Task, QUEUE_SIZE> mWorkQueue;
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};
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} // namespace uirenderer
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} // namespace android
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#endif // FRAMEWORKS_BASE_COMMONPOOL_H
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