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// * This file is part of the COLOBOT source code
// * Copyright (C) 2012, Polish Portal of Colobot (PPC)
// *
// * This program is free software: you can redistribute it and/or modify
// * it under the terms of the GNU General Public License as published by
// * the Free Software Foundation, either version 3 of the License, or
// * (at your option) any later version.
// *
// * This program is distributed in the hope that it will be useful,
// * but WITHOUT ANY WARRANTY; without even the implied warranty of
// * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// * GNU General Public License for more details.
// *
// * You should have received a copy of the GNU General Public License
// * along with this program. If not, see http://www.gnu.org/licenses/.
/**
* \file common/singleton.h
* \brief CSingleton base class for singletons
*/
#pragma once
#include <cassert>
template<typename T> class CSingleton
{
protected:
static T* mInstance;
public:
static T& GetInstance() {
assert(mInstance != nullptr);
return *mInstance;
}
static T* GetInstancePointer() {
assert(mInstance != nullptr);
return mInstance;
}
static bool IsCreated() {
return mInstance != nullptr;
}
CSingleton() {
assert(mInstance == nullptr);
mInstance = static_cast<T *>(this);
}
virtual ~CSingleton() {
mInstance = nullptr;
}
private:
CSingleton& operator=(const CSingleton<T> &);
CSingleton(const CSingleton<T> &);
};
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