forked from huawei/mindspore2022
61 lines
1.7 KiB
C++
61 lines
1.7 KiB
C++
/**
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* Copyright 2020 Huawei Technologies Co., Ltd
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef MINDSPORE_CCSRC_UTILS_SCOPED_LONG_RUNNING_H_
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#define MINDSPORE_CCSRC_UTILS_SCOPED_LONG_RUNNING_H_
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#include <memory>
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#include <utility>
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namespace mindspore {
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// Base Class for scoped long running code.
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// Enter() should release some global resoure, like Python GIL;
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// Leave() should acquire the same global resource released.
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class ScopedLongRunningHook {
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public:
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ScopedLongRunningHook() = default;
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virtual ~ScopedLongRunningHook() = default;
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virtual void Enter() = 0;
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virtual void Leave() = 0;
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};
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using ScopedLongRunningHookPtr = std::unique_ptr<ScopedLongRunningHook>;
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// Before calling into long-running code, construct this RAII class to release global resource
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// like Python GIL.
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class ScopedLongRunning {
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public:
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ScopedLongRunning() {
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if (hook_ != nullptr) {
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hook_->Enter();
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}
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}
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~ScopedLongRunning() {
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if (hook_ != nullptr) {
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hook_->Leave();
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}
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}
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static void SetHook(ScopedLongRunningHookPtr hook) {
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if (hook_ == nullptr) {
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hook_ = std::move(hook);
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}
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}
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private:
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static ScopedLongRunningHookPtr hook_;
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};
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} // namespace mindspore
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#endif // MINDSPORE_CCSRC_UTILS_SCOPED_LONG_RUNNING_H_
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