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_UTILS_SCOPED_LONG_RUNNING_H_ 18 #define MINDSPORE_CCSRC_UTILS_SCOPED_LONG_RUNNING_H_ 19 20 #include <memory> 21 #include <utility> 22 23 namespace mindspore { 24 // Base Class for scoped long running code. 25 // Enter() should release some global resoure, like Python GIL; 26 // Leave() should acquire the same global resource released. 27 class ScopedLongRunningHook { 28 public: 29 ScopedLongRunningHook() = default; 30 virtual ~ScopedLongRunningHook() = default; 31 virtual void Enter() = 0; 32 virtual void Leave() = 0; 33 }; 34 using ScopedLongRunningHookPtr = std::unique_ptr<ScopedLongRunningHook>; 35 36 // Before calling into long-running code, construct this RAII class to release global resource 37 // like Python GIL. 38 class ScopedLongRunning { 39 public: ScopedLongRunning()40 ScopedLongRunning() { 41 if (hook_ != nullptr) { 42 hook_->Enter(); 43 } 44 } ~ScopedLongRunning()45 ~ScopedLongRunning() { 46 if (hook_ != nullptr) { 47 hook_->Leave(); 48 } 49 } SetHook(ScopedLongRunningHookPtr hook)50 static void SetHook(ScopedLongRunningHookPtr hook) { 51 if (hook_ == nullptr) { 52 hook_ = std::move(hook); 53 } 54 } 55 56 private: 57 static ScopedLongRunningHookPtr hook_; 58 }; 59 } // namespace mindspore 60 #endif // MINDSPORE_CCSRC_UTILS_SCOPED_LONG_RUNNING_H_ 61