- Your Widget Set For OpenGL

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ucollectable.hpp

/***************************************************************************
    LibUFO - UI For OpenGL
    copyright         : (C) 2001-2005 by Johannes Schmidt
    email             : schmidtjf at users.sourceforge.net
                             -------------------

    file              : include/ufo/ucollectable.hpp
    begin             : Sat Jan 26 2002
    $Id: ucollectable.hpp,v 1.12 2005/09/30 14:30:08 schmidtjf Exp $
 ***************************************************************************/

/***************************************************************************
 *  This library is free software; 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 2.1 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       *
 * Lesser General Public License for more details.                         *
 *                                                                         *
 * You should have received a copy of the GNU Lesser General Public        *
 * License along with this library; if not, write to the Free Software     *
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *
 ***************************************************************************/

#ifndef UCOLLECTABLE_HPP
#define UCOLLECTABLE_HPP

#include <cstddef>

#include "ufo_global.hpp"

namespace ufo {

//class UFO_EXPORT UCollectable : public gc_cleanup {
//};
class UFO_EXPORT UCollectable {
public:
    UCollectable();
    virtual ~UCollectable();

    void setDynamic(bool b);
    bool isDynamic();

    void reference() const;
    void unreference() const;

    unsigned int getReferenceCount() const;

    // FIXME
    // hm, evil
    void * operator new(std::size_t size);
    inline void operator delete(void * p, std::size_t /* size */);
private:
    mutable unsigned int m_refCount  : 31;
    unsigned int m_isDynamic :  1;
    static bool m_dynamicAlloc;
};

//
// inline implementation
//


inline void
UCollectable::setDynamic(bool b) { m_isDynamic = b; }

inline bool
UCollectable::isDynamic() { return m_isDynamic; }

inline void
UCollectable::reference() const { m_refCount++; }

inline void
UCollectable::unreference() const {
    if (m_refCount) { // do nothing if ref() has never been called
        m_refCount--;
        if (m_refCount == 0 && m_isDynamic) { delete this; }
    }
}

inline unsigned int
UCollectable::getReferenceCount() const {
    return m_refCount;
}

inline void
UCollectable::operator delete(void * p, std::size_t /* size */) {
    ::operator delete(p);
}

} // namespace ufo

#endif // UCOLLECTABLE_HPP

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