src/singleton.h

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// Copyright (c) 2003 - 2004 Anselm R. Garbe <anselmg at t-online.de>
// See ../LICENSE.txt for license details.
//
// $Id: singleton.h 7 2007-05-24 11:03:53Z eg1981 $

#ifndef __SINGLETON_H
#define __SINGLETON_H

template <class T> class Singleton
{

public:

    static T *instance() {
        if (instance_ == 0) {
            // use default constructor
            instance_ = new T;
        }
        return instance_;
    }

private:

    // the singleton instance
    static T *instance_;
};

template <class T> T* Singleton<T>::instance_ = 0;

#endif // __SINGLETON_H

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