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/****************************************************************************
**
** 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.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#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 = Q_NULLPTR);
QSharedMemory(const QString &key, QObject *parent = Q_NULLPTR);
~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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