149 lines
4.3 KiB
C++
149 lines
4.3 KiB
C++
/****************************************************************************
|
|
**
|
|
** Copyright (C) 2016 The Qt Company Ltd.
|
|
** Contact: https://www.qt.io/licensing/
|
|
**
|
|
** This file is part of the QtCore module of the Qt Toolkit.
|
|
**
|
|
** $QT_BEGIN_LICENSE:LGPL$
|
|
** Commercial License Usage
|
|
** Licensees holding valid commercial Qt licenses may use this file in
|
|
** accordance with the commercial license agreement provided with the
|
|
** Software or, alternatively, in accordance with the terms contained in
|
|
** a written agreement between you and The Qt Company. For licensing terms
|
|
** and conditions see https://www.qt.io/terms-conditions. For further
|
|
** information use the contact form at https://www.qt.io/contact-us.
|
|
**
|
|
** GNU Lesser General Public License Usage
|
|
** Alternatively, this file may be used under the terms of the GNU Lesser
|
|
** General Public License version 3 as published by the Free Software
|
|
** Foundation and appearing in the file LICENSE.LGPL3 included in the
|
|
** packaging of this file. Please review the following information to
|
|
** ensure the GNU Lesser General Public License version 3 requirements
|
|
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
|
|
**
|
|
** GNU General Public License Usage
|
|
** Alternatively, this file may be used under the terms of the GNU
|
|
** General Public License version 2.0 or (at your option) the GNU General
|
|
** Public license version 3 or any later version approved by the KDE Free
|
|
** Qt Foundation. The licenses are as published by the Free Software
|
|
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
|
|
** included in the packaging of this file. Please review the following
|
|
** information to ensure the GNU General Public License requirements will
|
|
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
|
|
** https://www.gnu.org/licenses/gpl-3.0.html.
|
|
**
|
|
** $QT_END_LICENSE$
|
|
**
|
|
****************************************************************************/
|
|
|
|
//
|
|
// 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.
|
|
//
|
|
|
|
#include <QtCore/private/qglobal_p.h>
|
|
|
|
#ifndef QSCOPEDPOINTER_P_H
|
|
#define QSCOPEDPOINTER_P_H
|
|
|
|
#include "QtCore/qscopedpointer.h"
|
|
|
|
QT_BEGIN_NAMESPACE
|
|
|
|
|
|
/* 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
|
|
|
|
#endif
|