Singleton.h

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/*
 *  This file is part of AQUAgpusph, a free CFD program based on SPH.
 *  Copyright (C) 2012  Jose Luis Cercos Pita <jl.cercos@upm.es>
 *
 *  AQUAgpusph 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.
 *
 *  AQUAgpusph 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 AQUAgpusph.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef SINGLETON_H_INCLUDED
#define SINGLETON_H_INCLUDED
 
namespace Aqua {
 
template<typename T>
class Singleton
{
  public:
        static T* singleton() { return _singletonPtr; }
 
  protected:
        Singleton() { _singletonPtr = (T*)this; }
        virtual ~Singleton() { _singletonPtr = NULL; }
 
  private:
        static T* _singletonPtr;
};
 
template<typename T>
T* Singleton<T>::_singletonPtr = NULL;
 
} // namespaces
 
#endif // SINGLETON_H_INCLUDED