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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (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 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 qt-sales@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QSHAREDMEMORY_H
#define QSHAREDMEMORY_H
#include <QtCore/qobject.h>
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
QT_MODULE(Core)
#ifndef QT_NO_SHAREDMEMORY
class QSharedMemoryPrivate;
class Q_CORE_EXPORT QSharedMemory : public QObject
{
Q_OBJECT
Q_DECLARE_PRIVATE(QSharedMemory)
public:
enum AccessMode
{
ReadOnly,
ReadWrite
};
enum SharedMemoryError
{
NoError,
PermissionDenied,
InvalidSize,
KeyError,
AlreadyExists,
NotFound,
LockError,
OutOfResources,
UnknownError
};
QSharedMemory(QObject *parent = 0);
QSharedMemory(const QString &key, QObject *parent = 0);
~QSharedMemory();
void setKey(const QString &key);
QString key() const;
bool create(int size, AccessMode mode = ReadWrite);
int size() const;
bool attach(AccessMode mode = ReadWrite);
bool isAttached() const;
bool detach();
void *data();
const void* constData() const;
const void *data() const;
#ifndef QT_NO_SYSTEMSEMAPHORE
bool lock();
bool unlock();
#endif
SharedMemoryError error() const;
QString errorString() const;
private:
Q_DISABLE_COPY(QSharedMemory)
};
#endif // QT_NO_SHAREDMEMORY
QT_END_NAMESPACE
QT_END_HEADER
#endif // QSHAREDMEMORY_H
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