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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the Qt3Support module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://qt.nokia.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef Q3CLEANUPHANDLER_H
#define Q3CLEANUPHANDLER_H
#include <QtCore/qlist.h>
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
QT_MODULE(Qt3SupportLight)
template<class T>
class Q3CleanupHandler
{
QListData p;
public:
inline Q3CleanupHandler()
{ p.d = 0; }
~Q3CleanupHandler()
{
if (p.d) {
for (int i = 0; i < p.size(); ++i) {
T** t = static_cast<T**>(*p.at(i));
delete *t;
*t = 0;
}
qFree(p.d);
p.d = 0;
}
}
T* add(T **object)
{
if (!p.d) {
p.d = &QListData::shared_null;
p.d->ref.ref();
p.detach();
}
*p.prepend() = object;
return *object;
}
void remove(T **object)
{
if (p.d)
for (int i = 0; i < p.size(); ++i)
if (*p.at(i) == object)
p.remove(i--);
}
};
template<class T>
class Q3SingleCleanupHandler
{
T **object;
public:
inline Q3SingleCleanupHandler()
: object(0) {}
inline ~Q3SingleCleanupHandler()
{ if (object) { delete *object; *object = 0; } }
inline T* set(T **o)
{ object = o; return *object; }
inline void reset() { object = 0; }
};
QT_END_NAMESPACE
QT_END_HEADER
#endif //Q3CLEANUPHANDLER_H
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