55 lines
1.3 KiB
C++
55 lines
1.3 KiB
C++
/*
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* Copyright (C) 2019 Emeric Poupon
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*
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* This file is part of LMS.
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*
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* LMS is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* LMS is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with LMS. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <memory>
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template <typename T>
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class ServiceProvider
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{
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public:
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template <class ...Args>
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static
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T&
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create(Args&&... args)
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{
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assign(std::make_unique<T>(std::forward<Args>(args)...));
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return *get();
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}
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static void assign(std::unique_ptr<T> service) { _service = std::move(service); }
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static void clear() { _service.reset(); }
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static T* get() { return _service.get(); }
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private:
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static std::unique_ptr<T> _service;
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};
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template <typename T>
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std::unique_ptr<T> ServiceProvider<T>::_service = {};
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template <typename T>
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T*
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getService()
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{
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return ServiceProvider<T>::get();
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}
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