1 /** 2 * Copyright 2020 Huawei Technologies Co., Ltd 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 #ifndef MINDSPORE_CCSRC_COMMON_THREAD_POOL_H_ 18 #define MINDSPORE_CCSRC_COMMON_THREAD_POOL_H_ 19 20 #include <mutex> 21 #include <condition_variable> 22 #include <thread> 23 #include <vector> 24 #include <queue> 25 #include <string> 26 #include <atomic> 27 #include <memory> 28 #include <utility> 29 #include <functional> 30 #include <iostream> 31 #include "utils/log_adapter.h" 32 33 namespace mindspore { 34 namespace common { 35 enum Status { FAIL = -1, SUCCESS = 0 }; 36 using Task = std::function<int()>; 37 38 class ThreadPool { 39 public: 40 ~ThreadPool(); 41 ThreadPool(const ThreadPool &) = delete; 42 ThreadPool &operator=(const ThreadPool &) = delete; 43 static ThreadPool &GetInstance(); 44 bool SyncRun(const std::vector<Task> &tasks); GetSyncRunThreadNum()45 size_t GetSyncRunThreadNum() { return max_thread_num_; } 46 void ClearThreadPool(); 47 48 private: 49 ThreadPool(); 50 void SyncRunLoop(); 51 52 size_t max_thread_num_{1}; 53 std::mutex pool_mtx_; 54 std::atomic_bool exit_run_ = {false}; 55 std::queue<Task> task_queue_; 56 std::mutex task_mutex_; 57 std::condition_variable task_cond_var_; 58 size_t task_finished_count_{0}; 59 std::condition_variable finished_cond_var_; 60 std::vector<std::thread> sync_run_threads_{}; 61 }; 62 } // namespace common 63 } // namespace mindspore 64 65 #endif // MINDSPORE_CCSRC_COMMON_THREAD_POOL_H_ 66