77 lines
1.8 KiB
C++
77 lines
1.8 KiB
C++
/*
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* This file is part of the Colobot: Gold Edition source code
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* Copyright (C) 2001-2023, Daniel Roux, EPSITEC SA & TerranovaTeam
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* http://epsitec.ch; http://colobot.info; http://github.com/colobot
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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.
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* See the 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://gnu.org/licenses
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*/
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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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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> &) = delete;
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CSingleton(const CSingleton<T> &) = delete;
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};
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template <typename T> T* CSingleton<T>::m_instance = nullptr;
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