77 lines
1.8 KiB
C++
77 lines
1.8 KiB
C++
// * This file is part of the COLOBOT source code
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// * Copyright (C) 2012, Polish Portal of Colobot (PPC)
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// *
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// * This program 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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// * This program 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 this program. If not, see http://www.gnu.org/licenses/.
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/**
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* \file common/singleton.h
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* \brief CSingleton base class for singletons
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*/
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#pragma once
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#include <cassert>
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template<typename T> class CSingleton
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{
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protected:
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static T* m_instance;
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public:
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static T& GetInstance()
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{
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assert(m_instance != nullptr);
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return *m_instance;
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}
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static T* GetInstancePointer()
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{
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assert(m_instance != nullptr);
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return m_instance;
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}
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static bool IsCreated()
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{
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return m_instance != nullptr;
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}
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CSingleton()
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{
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assert(m_instance == nullptr);
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m_instance = static_cast<T *>(this);
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}
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virtual ~CSingleton()
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{
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m_instance = nullptr;
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}
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#ifdef TESTS
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static void ReplaceInstance(T* newInstance)
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{
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assert(newInstance != nullptr);
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if (m_instance != nullptr)
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delete m_instance;
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m_instance = newInstance;
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}
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#endif
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private:
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CSingleton& operator=(const CSingleton<T> &);
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CSingleton(const CSingleton<T> &);
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};
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