ISingleton.h

#ifndef __ISINGLETON_H__
#define __ISINGLETON_H__
/*
Peon - Win32 Games Programming Library
Copyright (C) 2002-2005 Erik Yuzwa

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.

This library 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
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

Erik Yuzwa
peon AT wazooinc DOT com
*/

/* Original version Copyright (C) Scott Bilas, 2000.
 * All rights reserved worldwide.
 *
 * This software is provided "as is" without express or implied
 * warranties. You may freely copy and compile this source into
 * applications you distribute provided that the copyright text
 * below is included in the resulting source code, for example:
 * "Portions Copyright (C) Scott Bilas, 2000"
 */

#include "Peonstdafx.h"

namespace peon 
{

    template <typename T> class PEONMAIN_API ISingleton
    {
    protected:

        static T* ms_Singleton;

    public:
        ISingleton( void )
        {
            assert( !ms_Singleton );
                        ms_Singleton = static_cast< T* >( this );
        }

        ~ISingleton( void )
            {  assert( ms_Singleton );  ms_Singleton = 0;  }
        
                static T& getSingleton( void )
                {       assert( ms_Singleton );  return ( *ms_Singleton ); }
        
                static T* getSingletonPtr( void )
                { return ms_Singleton; }
    };
}

#endif

---