forked from huawei/mindspore2022
40 lines
1.2 KiB
C++
40 lines
1.2 KiB
C++
/**
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* Copyright 2021 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_CORE_UTILS_SINGLETON_H_
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#define MINDSPORE_CORE_UTILS_SINGLETON_H_
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namespace mindspore {
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template <typename T>
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class Singleton {
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public:
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explicit Singleton(T &&) = delete;
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explicit Singleton(const T &) = delete;
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void operator=(const T &) = delete;
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// thread safety implement
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template <typename... _Args>
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static T &Instance(_Args... args) {
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static T instance(args...);
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return instance;
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}
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protected:
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Singleton() = default;
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virtual ~Singleton() = default;
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};
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} // namespace mindspore
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#endif // MINDSPORE_CORE_UTILS_SINGLETON_H_
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