qqueue.h

/****************************************************************************
** $Id: //depot/qt/main/src/tools/qqueue.h#15 $
**
** Definition of QQueue template/macro class
**
** Created : 920917
**
** Copyright (C) 1992-2000 Trolltech AS.  All rights reserved.
**
** This file is part of the tools module of the Qt GUI Toolkit.
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** as defined by Trolltech AS of Norway and appearing in the file
** LICENSE.QPL included in the packaging of this file.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
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** licenses may use this file in accordance with the Qt Commercial License
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**********************************************************************/

#ifndef QQUEUE_H
#define QQUEUE_H

#ifndef QT_H
#include "qglist.h"
#endif // QT_H


template<class type> class QQueue : private QGList
{
public:
    QQueue()                            {}
    QQueue( const QQueue<type> &q ) : QGList(q) {}
   ~QQueue()                            { clear(); }
    QQueue<type>& operator=(const QQueue<type> &q)
                        { return (QQueue<type>&)QGList::operator=(q); }
    bool  autoDelete() const            { return QCollection::autoDelete(); }
    void  setAutoDelete( bool del )     { QCollection::setAutoDelete(del); }
    uint  count()   const               { return QGList::count(); }
    bool  isEmpty() const               { return QGList::count() == 0; }
    void  enqueue( const type *d )      { QGList::append(Item(d)); }
    type *dequeue()                     { return (type *)QGList::takeFirst();}
    bool  remove()                      { return QGList::removeFirst(); }
    void  clear()                       { QGList::clear(); }
    type *head()    const               { return (type *)QGList::cfirst(); }
          operator type *() const       { return (type *)QGList::cfirst(); }
    type *current() const               { return (type *)QGList::cfirst(); }
private:
    void  deleteItem( Item d );
};

#if defined(Q_DELETING_VOID_UNDEFINED)
template<> inline void QQueue<void>::deleteItem( Item )
{
}
#endif

template<class type> inline void QQueue<type>::deleteItem( QCollection::Item d )
{
    if ( del_item ) delete (type *)d;
}


#endif // QQUEUE_H