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 #ifndef MINDSPORE_CCSRC_PS_PS_CACHE_PS_DATA_PS_DATA_CHANNEL_H_ 17 #define MINDSPORE_CCSRC_PS_PS_CACHE_PS_DATA_PS_DATA_CHANNEL_H_ 18 19 #include <memory> 20 #include <string> 21 #include <condition_variable> 22 23 namespace mindspore { 24 namespace ps { 25 class PsDataChannel { 26 public: PsDataChannel(const std::string & channel_name,size_t step_num)27 PsDataChannel(const std::string &channel_name, size_t step_num) 28 : channel_name_(channel_name), 29 step_num_(step_num), 30 current_data_step_(0), 31 current_graph_step_(0), 32 channel_open_(false), 33 data_(nullptr), 34 data_size_(0) {} 35 virtual ~PsDataChannel() = default; 36 void set_data(const void *data, const size_t data_size); data()37 const void *data() const { return data_; } data_size()38 size_t data_size() const { return data_size_; } ResetData()39 void ResetData() { data_ = nullptr; } set_step_num(size_t step_num)40 void set_step_num(size_t step_num) { step_num_ = step_num; } 41 void TryWakeChannel(bool force_wake = false); 42 43 private: 44 void TryLockChannel(); 45 std::string channel_name_; 46 // The step num of each epoch. 47 size_t step_num_; 48 size_t current_data_step_; 49 size_t current_graph_step_; 50 bool channel_open_; 51 std::mutex channel_mutex_; 52 std::condition_variable channel_; 53 void *data_; 54 size_t data_size_; 55 }; 56 } // namespace ps 57 } // namespace mindspore 58 #endif // MINDSPORE_CCSRC_PS_PS_CACHE_PS_DATA_PS_DATA_CHANNEL_H_ 59