mirror of https://gitee.com/bigwinds/arangodb
53 lines
1.4 KiB
C++
53 lines
1.4 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2016 by EMC Corporation, All Rights Reserved
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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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/// Copyright holder is EMC Corporation
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///
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/// @author Andrey Abramov
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/// @author Vasiliy Nabatchikov
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////////////////////////////////////////////////////////////////////////////////
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#ifndef IRESEARCH_SINGLETONE_H
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#define IRESEARCH_SINGLETONE_H
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// internal iResearch functionality not to be exported outside main library (so/dll)
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#ifdef IRESEARCH_DLL_PLUGIN
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static_assert(false, "Singleton should not be visible in plugins")
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#else
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#include "shared.hpp"
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#include "utils/noncopyable.hpp"
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NS_ROOT
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template< typename T >
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class singleton: util::noncopyable {
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public:
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static T& instance() {
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static T inst;
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return inst;
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}
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protected:
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singleton() = default;
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};
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NS_END // NS_ROOT
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#endif // #ifdef IRESEARCH_DLL_PLUGIN
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#endif
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