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131 lines
3.4 KiB
131 lines
3.4 KiB
14 years ago
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/****************************************************************************
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**
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** ...
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**
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** Copyright (C) 2001-2008 Trolltech ASA. All rights reserved.
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**
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** This file is part of the tools module of the Qt GUI Toolkit.
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**
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** This file may be used under the terms of the GNU General
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** Public License versions 2.0 or 3.0 as published by the Free
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** Software Foundation and appearing in the files LICENSE.GPL2
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** and LICENSE.GPL3 included in the packaging of this file.
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** Alternatively you may (at your option) use any later version
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** of the GNU General Public License if such license has been
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** publicly approved by Trolltech ASA (or its successors, if any)
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** and the KDE Free Qt Foundation.
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**
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** Please review the following information to ensure GNU General
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** Public Licensing requirements will be met:
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** http://trolltech.com/products/qt/licenses/licensing/opensource/.
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** If you are unsure which license is appropriate for your use, please
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** review the following information:
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** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
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** or contact the sales department at sales@trolltech.com.
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**
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** This file may be used under the terms of the Q Public License as
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** defined by Trolltech ASA and appearing in the file LICENSE.QPL
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** included in the packaging of this file. Licensees holding valid Qt
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** Commercial licenses may use this file in accordance with the Qt
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** Commercial License Agreement provided with the Software.
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**
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** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
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** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
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** herein.
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**
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**********************************************************************/
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#ifndef QCLEANUPHANDLER_H
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#define QCLEANUPHANDLER_H
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#ifndef QT_H
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#include "qptrlist.h"
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#endif // QT_H
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template<class Type>
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class QCleanupHandler
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{
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public:
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QCleanupHandler() : cleanupObjects( 0 ) {}
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~QCleanupHandler() { clear(); }
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Type* add( Type **object ) {
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if ( !cleanupObjects )
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cleanupObjects = new QPtrList<Type*>;
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cleanupObjects->insert( 0, object );
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return *object;
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}
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void remove( Type **object ) {
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if ( !cleanupObjects )
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return;
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if ( cleanupObjects->findRef( object ) >= 0 )
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(void) cleanupObjects->take();
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}
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bool isEmpty() const {
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return cleanupObjects ? cleanupObjects->isEmpty() : TRUE;
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}
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void clear() {
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if ( !cleanupObjects )
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return;
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QPtrListIterator<Type*> it( *cleanupObjects );
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Type **object;
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while ( ( object = it.current() ) ) {
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delete *object;
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*object = 0;
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cleanupObjects->remove( object );
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}
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delete cleanupObjects;
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cleanupObjects = 0;
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}
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private:
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QPtrList<Type*> *cleanupObjects;
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};
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template<class Type>
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class QSingleCleanupHandler
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{
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public:
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QSingleCleanupHandler() : object( 0 ) {}
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~QSingleCleanupHandler() {
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if ( object ) {
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delete *object;
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*object = 0;
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}
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}
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Type* set( Type **o ) {
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object = o;
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return *object;
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}
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void reset() { object = 0; }
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private:
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Type **object;
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};
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template<class Type>
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class QSharedCleanupHandler
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{
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public:
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QSharedCleanupHandler() : object( 0 ) {}
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~QSharedCleanupHandler() {
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if ( object ) {
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if ( (*object)->deref() )
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delete *object;
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*object = 0;
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}
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}
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Type* set( Type **o ) {
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object = o;
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return *object;
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}
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void reset() { object = 0; }
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private:
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Type **object;
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};
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#endif //QCLEANUPHANDLER_H
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