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+/****************************************************************************
+** $Id$
+**
+** ...
+**
+** Copyright (C) 2001-2002 Trolltech AS. All rights reserved.
+**
+** This file is part of the tools module of the Qt GUI Toolkit.
+**
+** This file may be distributed under the terms of the Q Public License
+** 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.
+**
+** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
+** licenses may use this file in accordance with the Qt Commercial License
+** Agreement provided with the Software.
+**
+** 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/pricing.html or email sales@trolltech.com for
+** information about Qt Commercial License Agreements.
+** See http://www.trolltech.com/qpl/ for QPL licensing information.
+** 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 <qptrlist.h>
+#endif // QT_H
+
+template<class Type>
+class QCleanupHandler
+{
+public:
+ QCleanupHandler() : cleanupObjects( 0 ) {}
+ ~QCleanupHandler() { clear(); }
+
+ Type* add( Type **object ) {
+ if ( !cleanupObjects )
+ cleanupObjects = new QPtrList<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;
+ QPtrListIterator<Type*> it( *cleanupObjects );
+ Type **object;
+ while ( ( object = it.current() ) ) {
+ delete *object;
+ *object = 0;
+ cleanupObjects->remove( object );
+ }
+ delete cleanupObjects;
+ cleanupObjects = 0;
+ }
+
+private:
+ QPtrList<Type*> *cleanupObjects;
+};
+
+template<class Type>
+class QSingleCleanupHandler
+{
+public:
+ QSingleCleanupHandler() : object( 0 ) {}
+ ~QSingleCleanupHandler() {
+ if ( object ) {
+ delete *object;
+ *object = 0;
+ }
+ }
+ Type* set( Type **o ) {
+ object = o;
+ return *object;
+ }
+ void reset() { object = 0; }
+private:
+ Type **object;
+};
+
+template<class Type>
+class QSharedCleanupHandler
+{
+public:
+ QSharedCleanupHandler() : object( 0 ) {}
+ ~QSharedCleanupHandler() {
+ if ( object ) {
+ if ( (*object)->deref() )
+ delete *object;
+ *object = 0;
+ }
+ }
+ Type* set( Type **o ) {
+ object = o;
+ return *object;
+ }
+ void reset() { object = 0; }
+private:
+ Type **object;
+};
+
+#endif //QCLEANUPHANDLER_H