ISingleton.h

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/* Copyright, 2004 Werewolf
 *
 * This file is part of Werewolf.
 * Werewolf 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 2, or (at your option)
 * any later version.

 * Werewolf 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 Werewolf; see the file COPYING. If not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
 * MA 02111-1307, USA.
 */

#ifndef __ISINGLETON_H__
#define __ISINGLETON_H__

//
// System Includes
//

//
// NeL Includes
//
#include <nel/misc/debug.h>

//
// Werewolf Includes
//

//
// Class
//

namespace WWCOMMON {

template<class T>
class ISingleton {
public:
    
    static T &instance() {
        if(!m_Instance) {
            m_Instance = new T;
            nlassert(m_Instance);
        }
        return *m_Instance;
    }

    static T *getInstancePtr() {
        if(!m_Instance) {
            m_Instance = new T;
            nlassert(m_Instance);
        }
        return m_Instance;
    }
    
    static void uninstance() {
        if(m_Instance) {
            delete m_Instance;
            m_Instance = 0;
        }
    }
    
protected:
    
    ISingleton() {}
    
    static T *m_Instance;
};

template <class T>
T* ISingleton<T>::m_Instance = 0;

}; // END OF NAMESPACE WWCOMMON

#endif // __ISINGLETON_H__