/*
    Scan Tailor - Interactive post-processing tool for scanned pages.
    Copyright (C) 2007-2008  Joseph Artsimovich <joseph_a@mail.ru>

    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 3 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, see <http://www.gnu.org/licenses/>.
*/

#ifndef REFCOUNTABLE_H_
#define REFCOUNTABLE_H_

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <QAtomicInt>

class RefCountable
{
public:
    RefCountable() : m_refCounter(0) {}

    RefCountable(RefCountable const& other)
    {
        // don't copy the reference counter!
    }

    void operator=(RefCountable const& other)
    {
        // don't copy the reference counter!
    }

    virtual ~RefCountable() {}

    void ref() const
    {
        m_refCounter.fetchAndAddRelaxed(1);
    }

    void unref() const
    {
        if (m_refCounter.fetchAndAddRelease(-1) == 1) {
            delete this;
        }
    }
private:
    mutable QAtomicInt m_refCounter;
};

#endif
