MEM_SmartPtr.h

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/*
 * $Id: MEM_SmartPtr.h 35156 2011-02-25 11:47:18Z jesterking $
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * 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 2
 * 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, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#ifndef NAN_INCLUDED_MEM_SmartPtr_h
#define NAN_INCLUDED_MEM_SmartPtr_h


#include <stdlib.h> // for NULL !


template 
        < class T >
class MEM_SmartPtr {

public :

        MEM_SmartPtr(
                const MEM_SmartPtr &rhs
        ){
                m_val = rhs.Release();
        }

        MEM_SmartPtr(
                T* val
        ) :
                m_val (val)
        {
        }
        
        MEM_SmartPtr(
        ) :
                m_val (NULL)
        {
        }

        operator T * () const {
                return m_val;
        }

                T &
        Ref(
        ) const {
                return *m_val;
        }       

        MEM_SmartPtr & operator=(
                const MEM_SmartPtr &rhs
        ) {
                if (this->m_val != rhs.m_val) {
                        delete this->m_val;
                }

                this->m_val = rhs.Release();
                return *this;
        }
        
        T * operator->() const {
                return m_val;
        }

                T *
        Release(
        ) const {
                T* temp = m_val;
                (const_cast<MEM_SmartPtr *>(this))->m_val = NULL;       
                return temp;
        }

                void
        Delete(
        ) {
                delete (m_val);
                m_val = NULL;
        }

        ~MEM_SmartPtr(
        ) {
                delete (m_val);
        }

private :
        
        T * m_val;
};

#endif