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 #include "include/backend/visible.h" 23 24 namespace mindspore { 25 namespace ps { 26 class BACKEND_EXPORT PsDataChannel { 27 public: PsDataChannel(const std::string & channel_name,size_t step_num)28 PsDataChannel(const std::string &channel_name, size_t step_num) 29 : channel_name_(channel_name), 30 step_num_(step_num), 31 current_data_step_(0), 32 current_graph_step_(0), 33 channel_open_(false), 34 data_(nullptr), 35 data_size_(0) {} 36 virtual ~PsDataChannel() = default; 37 void set_data(const void *data, const size_t data_size); data()38 const void *data() const { return data_; } data_size()39 size_t data_size() const { return data_size_; } ResetData()40 void ResetData() { data_ = nullptr; } set_step_num(size_t step_num)41 void set_step_num(size_t step_num) { step_num_ = step_num; } 42 void TryWakeChannel(bool force_wake = false); 43 void TryLockChannel(); 44 45 private: 46 std::string channel_name_; 47 // The step num of each epoch. 48 size_t step_num_; 49 size_t current_data_step_; 50 size_t current_graph_step_; 51 bool channel_open_; 52 std::mutex channel_mutex_; 53 std::condition_variable channel_; 54 void *data_; 55 size_t data_size_; 56 }; 57 } // namespace ps 58 } // namespace mindspore 59 #endif // MINDSPORE_CCSRC_PS_PS_CACHE_PS_DATA_PS_DATA_CHANNEL_H_ 60