UDestroyer.h

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/*
*  utilite is a cross-platform library with
*  useful utilities for fast and small developing.
*  Copyright (C) 2010  Mathieu Labbe
*
*  utilite is free library: you can redistribute it and/or modify
*  it under the terms of the GNU Lesser General Public License as published by
*  the Free Software Foundation, either version 3 of the License, or
*  (at your option) any later version.
*
*  utilite 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 Lesser General Public License for more details.
*
*  You should have received a copy of the GNU Lesser General Public License
*  along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
 
#ifndef UDESTROYER_H
#define UDESTROYER_H
 
template <class T>
class UDestroyer
{
public:
    UDestroyer(T* doomed = 0)  : doomed_(doomed) {}
    
    ~UDestroyer()
    {
        if(doomed_)
        {
            delete doomed_;
            doomed_ = 0;
        }
    }
 
    bool setDoomed(T* doomed)
        {
        if(doomed_ && doomed)
        {
                return false;
        }
                doomed_ = doomed;
                return true;
        }
 
private:
    // Prevent users from making copies of a 
    // Destroyer to avoid double deletion:
    UDestroyer(const UDestroyer<T>&);
    void operator=(const UDestroyer<T>&);
 
private:
    T* doomed_;
};
 
#endif // UDESTROYER_H