MEM_SmartPtr.h

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/*
 * ***** 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