1 /** 2 * Copyright 2021 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_RUNTIME_HARDWARE_DEVICE_CONTEXT_MANAGER_H_ 18 #define MINDSPORE_CCSRC_RUNTIME_HARDWARE_DEVICE_CONTEXT_MANAGER_H_ 19 20 #include <map> 21 #include <string> 22 #include <memory> 23 #include <utility> 24 #include <functional> 25 #include <mutex> 26 #include <vector> 27 #include "runtime/hardware/device_context.h" 28 namespace mindspore { 29 namespace device { 30 using DeviceContextCreator = std::function<std::shared_ptr<DeviceContext>(const DeviceContextKey &)>; 31 32 class DeviceContextManager { 33 public: GetInstance()34 static DeviceContextManager &GetInstance() { 35 static DeviceContextManager instance; 36 return instance; 37 } 38 void Register(const std::string &device_name, DeviceContextCreator &&device_context_creator); 39 DeviceContext *GetOrCreateDeviceContext(const DeviceContextKey &device_context_key); 40 void UpdateDeviceContextKey(const DeviceContextKey &old_key, const DeviceContextKey &new_key); 41 void ClearDeviceContexts(); 42 43 private: 44 DeviceContextManager() = default; 45 ~DeviceContextManager() = default; 46 DISABLE_COPY_AND_ASSIGN(DeviceContextManager); 47 48 // The string converted from DeviceContextKey -> DeviceContextPtr. 49 std::map<std::string, DeviceContextPtr> device_contexts_; 50 // The name of device -> DeviceContextCreator. 51 std::map<std::string, DeviceContextCreator> device_context_creators_; 52 }; 53 54 class DeviceContextRegister { 55 public: DeviceContextRegister(const std::string & device_name,DeviceContextCreator && runtime_creator)56 DeviceContextRegister(const std::string &device_name, DeviceContextCreator &&runtime_creator) { 57 DeviceContextManager::GetInstance().Register(device_name, std::move(runtime_creator)); 58 } 59 ~DeviceContextRegister() = default; 60 }; 61 62 #define MS_REGISTER_DEVICE(DEVICE_NAME, DEVICE_CONTEXT_CLASS) \ 63 static const DeviceContextRegister g_device_##DEVICE_NAME##_reg( \ 64 DEVICE_NAME, [](const DeviceContextKey &device_context_key) { \ 65 return std::make_shared<DEVICE_CONTEXT_CLASS>(device_context_key); \ 66 }); 67 } // namespace device 68 } // namespace mindspore 69 #endif // MINDSPORE_CCSRC_RUNTIME_HARDWARE_DEVICE_CONTEXT_MANAGER_H_ 70