qcleanuphandler_p.h

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/**********************************************************************
** Copyright (C) 2000-2002 Trolltech AS.  All rights reserved.
**
** This file is part of the Qtopia Environment.
**
** 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.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** See http://www.trolltech.com/gpl/ for GPL licensing information.
**
** Contact info@trolltech.com if any conditions of this licensing are
** not clear to you.
**
**********************************************************************/

#ifndef QCLEANUPHANDLER_H
#define QCLEANUPHANDLER_H

#ifndef QT_H
#include <qlist.h>
#endif // QT_H

template<class Type>
class Q_EXPORT QCleanupHandler
{
public:
    QCleanupHandler() : cleanupObjects( 0 ) {}
    ~QCleanupHandler() { clear(); }

    Type* add( Type **object ) {
        if ( !cleanupObjects )
            cleanupObjects = new QList<Type*>;
        cleanupObjects->insert( 0, object );
        return *object;
    }

    void remove( Type **object ) {
        if ( !cleanupObjects )
            return;
        if ( cleanupObjects->findRef( object ) >= 0 )
            (void) cleanupObjects->take();
    }

    bool isEmpty() const {
        return cleanupObjects ? cleanupObjects->isEmpty() : TRUE;
    }

    void clear() {
        if ( !cleanupObjects )
            return;
        QListIterator<Type*> it( *cleanupObjects );
        Type **object;
        while ( ( object = it.current() ) ) {
            delete *object;
            *object = 0;
            cleanupObjects->remove( object );
        }
        delete cleanupObjects;
        cleanupObjects = 0;
    }

private:
    QList<Type*> *cleanupObjects;
};

#endif //QCLEANUPHANDLER_H

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