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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** 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 Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/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 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QSHAREDMEMORY_H
#define QSHAREDMEMORY_H
#include <QtCore/qobject.h>
QT_BEGIN_NAMESPACE
#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;
void setNativeKey(const QString &key);
QString nativeKey() 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
#endif // QSHAREDMEMORY_H
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