1 /* 2 * Copyright 2024 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 19 #include <functional> 20 #include <future> 21 #include <optional> 22 #include <thread> 23 24 class EventLoop { 25 public: 26 void queueWork(std::function<void()>&& job); 27 ~EventLoop(); 28 int getlooptid(); 29 30 private: 31 // Front queue where items are loaded 32 std::unique_ptr<std::queue<std::function<void()>>> mEventsQueue{ 33 std::make_unique<std::queue<std::function<void()>>>()}; 34 // Back queue where items are processed 35 std::unique_ptr<std::queue<std::function<void()>>> mEventsProcessing{ 36 std::make_unique<std::queue<std::function<void()>>>()}; 37 std::condition_variable mCV; 38 std::mutex mQueueMutex{}; 39 std::mutex mRunnerMutex{}; 40 std::promise<int> mTidPromise{}; 41 std::future<int> mTidFuture = mTidPromise.get_future(); 42 std::optional<int> mTid; 43 bool mStopping = false; 44 std::unique_ptr<std::thread> mRunner = std::make_unique<std::thread>(&EventLoop::run, this); 45 void run(); 46 };