1 2 /** 3 * Copyright (C) 2018-present MongoDB, Inc. 4 * 5 * This program is free software: you can redistribute it and/or modify 6 * it under the terms of the Server Side Public License, version 1, 7 * as published by MongoDB, Inc. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * Server Side Public License for more details. 13 * 14 * You should have received a copy of the Server Side Public License 15 * along with this program. If not, see 16 * <http://www.mongodb.com/licensing/server-side-public-license>. 17 * 18 * As a special exception, the copyright holders give permission to link the 19 * code of portions of this program with the OpenSSL library under certain 20 * conditions as described in each individual source file and distribute 21 * linked combinations including the program with the OpenSSL library. You 22 * must comply with the Server Side Public License in all respects for 23 * all of the code used other than as permitted herein. If you modify file(s) 24 * with this exception, you may extend this exception to your version of the 25 * file(s), but you are not obligated to do so. If you do not wish to do so, 26 * delete this exception statement from your version. If you delete this 27 * exception statement from all source files in the program, then also delete 28 * it in the license file. 29 */ 30 31 #pragma once 32 33 #include <cstdint> 34 #include <vector> 35 36 #include "mongo/stdx/condition_variable.h" 37 #include "mongo/stdx/mutex.h" 38 #include "mongo/util/concurrency/thread_pool_interface.h" 39 40 namespace mongo { 41 namespace executor { 42 43 class NetworkInterface; 44 45 /** 46 * A Thread Pool implementation based on running tasks on the background thread 47 * of some Network Interface. 48 * 49 * The basic idea is to triage tasks, running them immediately if we're invoked 50 * from on the network interface thread, and queueing them up to be drained by 51 * a setAlarm if not. 52 */ 53 class NetworkInterfaceThreadPool final : public ThreadPoolInterface { 54 public: 55 NetworkInterfaceThreadPool(NetworkInterface* net); 56 ~NetworkInterfaceThreadPool() override; 57 58 void startup() override; 59 void shutdown() override; 60 void join() override; 61 Status schedule(Task task) override; 62 63 private: 64 void consumeTasks(stdx::unique_lock<stdx::mutex> lk); 65 void dtorImpl(); 66 67 NetworkInterface* const _net; 68 69 // Protects all of the pool state below 70 stdx::mutex _mutex; 71 stdx::condition_variable _joiningCondition; 72 std::vector<Task> _tasks; 73 bool _started = false; 74 bool _inShutdown = false; 75 bool _joining = false; 76 bool _registeredAlarm = false; 77 bool _consumingTasks = false; 78 }; 79 80 } // namespace executor 81 } // namespace mongo 82