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_MINDDATA_DATASET_ENGINE_GNN_GRAPH_SHARED_MEMORY_H_ 17 #define MINDSPORE_CCSRC_MINDDATA_DATASET_ENGINE_GNN_GRAPH_SHARED_MEMORY_H_ 18 19 #include <sys/ipc.h> 20 #include <sys/shm.h> 21 #include <mutex> 22 #include <string> 23 24 #include "minddata/dataset/util/status.h" 25 26 namespace mindspore { 27 namespace dataset { 28 namespace gnn { 29 30 const int kGnnSharedMemoryId = 65; 31 32 class GraphSharedMemory { 33 public: 34 explicit GraphSharedMemory(int64_t memory_size, key_t memory_key); 35 explicit GraphSharedMemory(int64_t memory_size, const std::string &mr_file); 36 37 ~GraphSharedMemory(); 38 39 // @param uint8_t** shared_memory - shared memory address 40 // @return Status - the status code 41 Status CreateSharedMemory(); 42 43 // @param uint8_t** shared_memory - shared memory address 44 // @return Status - the status code 45 Status GetSharedMemory(); 46 47 Status DeleteSharedMemory(); 48 49 Status InsertData(const uint8_t *data, int64_t len, int64_t *offset); 50 51 Status GetData(uint8_t *data, int64_t data_len, int64_t offset, int64_t get_data_len); 52 memory_key()53 key_t memory_key() { return memory_key_; } 54 memory_size()55 int64_t memory_size() { return memory_size_; } 56 57 private: 58 Status SharedMemoryImpl(const int &shmflg); 59 60 std::string mr_file_; 61 int64_t memory_size_; 62 key_t memory_key_; 63 std::string memory_key_str_; 64 uint8_t *memory_ptr_; 65 int64_t memory_offset_; 66 std::mutex mutex_; 67 bool is_new_create_; 68 }; 69 } // namespace gnn 70 } // namespace dataset 71 } // namespace mindspore 72 #endif // MINDSPORE_CCSRC_MINDDATA_DATASET_ENGINE_GNN_GRAPH_SHARED_MEMORY_H_ 73