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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtCore 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 Technology Preview License Agreement accompanying
** this package.
**
** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists for the convenience
// of internal files. This header file may change from version to version
// without notice, or even be removed.
//
// We mean it.
//
#ifndef QSCOPEDPOINTER_P_H
#define QSCOPEDPOINTER_P_H
#include "QtCore/qscopedpointer.h"
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
QT_MODULE(Core)
/* Internal helper class - exposes the data through data_ptr (legacy from QShared).
Required for some internal Qt classes, do not use otherwise. */
template <typename T, typename Cleanup = QScopedPointerDeleter<T> >
class QCustomScopedPointer : public QScopedPointer<T, Cleanup>
{
public:
explicit inline QCustomScopedPointer(T *p = 0)
: QScopedPointer<T, Cleanup>(p)
{
}
inline T *&data_ptr()
{
return this->d;
}
inline bool operator==(const QCustomScopedPointer<T, Cleanup> &other) const
{
return this->d == other.d;
}
inline bool operator!=(const QCustomScopedPointer<T, Cleanup> &other) const
{
return this->d != other.d;
}
private:
Q_DISABLE_COPY(QCustomScopedPointer)
};
/* Internal helper class - a handler for QShared* classes, to be used in QCustomScopedPointer */
template <typename T>
class QScopedPointerSharedDeleter
{
public:
static inline void cleanup(T *d)
{
if (d && !d->ref.deref())
delete d;
}
};
/* Internal.
This class is basically a scoped pointer pointing to a ref-counted object
*/
template <typename T>
class QScopedSharedPointer : public QCustomScopedPointer<T, QScopedPointerSharedDeleter<T> >
{
public:
explicit inline QScopedSharedPointer(T *p = 0)
: QCustomScopedPointer<T, QScopedPointerSharedDeleter<T> >(p)
{
}
inline void detach()
{
qAtomicDetach(this->d);
}
inline void assign(T *other)
{
if (this->d == other)
return;
if (other)
other->ref.ref();
T *oldD = this->d;
this->d = other;
QScopedPointerSharedDeleter<T>::cleanup(oldD);
}
inline bool operator==(const QScopedSharedPointer<T> &other) const
{
return this->d == other.d;
}
inline bool operator!=(const QScopedSharedPointer<T> &other) const
{
return this->d != other.d;
}
private:
Q_DISABLE_COPY(QScopedSharedPointer)
};
QT_END_NAMESPACE
QT_END_HEADER
#endif
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