149 lines
4.3 KiB
C++
149 lines
4.3 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/legal
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**
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** This file is part of the QtCore module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Digia. For licensing terms and
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** conditions see http://qt.digia.com/licensing. For further information
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** use the contact form at http://qt.digia.com/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Digia gives you certain additional
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** rights. These rights are described in the Digia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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//
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// W A R N I N G
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// -------------
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//
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// This file is not part of the Qt API. It exists for the convenience
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// of internal files. This header file may change from version to version
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// without notice, or even be removed.
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//
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// We mean it.
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//
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#ifndef QSCOPEDPOINTER_P_H
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#define QSCOPEDPOINTER_P_H
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#include "QtCore/qscopedpointer.h"
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QT_BEGIN_NAMESPACE
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/* Internal helper class - exposes the data through data_ptr (legacy from QShared).
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Required for some internal Qt classes, do not use otherwise. */
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template <typename T, typename Cleanup = QScopedPointerDeleter<T> >
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class QCustomScopedPointer : public QScopedPointer<T, Cleanup>
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{
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public:
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explicit inline QCustomScopedPointer(T *p = 0)
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: QScopedPointer<T, Cleanup>(p)
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{
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}
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inline T *&data_ptr()
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{
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return this->d;
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}
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inline bool operator==(const QCustomScopedPointer<T, Cleanup> &other) const
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{
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return this->d == other.d;
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}
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inline bool operator!=(const QCustomScopedPointer<T, Cleanup> &other) const
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{
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return this->d != other.d;
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}
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private:
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Q_DISABLE_COPY(QCustomScopedPointer)
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};
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/* Internal helper class - a handler for QShared* classes, to be used in QCustomScopedPointer */
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template <typename T>
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class QScopedPointerSharedDeleter
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{
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public:
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static inline void cleanup(T *d)
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{
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if (d && !d->ref.deref())
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delete d;
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}
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};
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/* Internal.
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This class is basically a scoped pointer pointing to a ref-counted object
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*/
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template <typename T>
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class QScopedSharedPointer : public QCustomScopedPointer<T, QScopedPointerSharedDeleter<T> >
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{
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public:
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explicit inline QScopedSharedPointer(T *p = 0)
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: QCustomScopedPointer<T, QScopedPointerSharedDeleter<T> >(p)
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{
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}
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inline void detach()
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{
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qAtomicDetach(this->d);
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}
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inline void assign(T *other)
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{
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if (this->d == other)
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return;
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if (other)
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other->ref.ref();
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T *oldD = this->d;
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this->d = other;
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QScopedPointerSharedDeleter<T>::cleanup(oldD);
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}
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inline bool operator==(const QScopedSharedPointer<T> &other) const
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{
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return this->d == other.d;
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}
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inline bool operator!=(const QScopedSharedPointer<T> &other) const
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{
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return this->d != other.d;
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}
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private:
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Q_DISABLE_COPY(QScopedSharedPointer)
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};
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QT_END_NAMESPACE
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#endif
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