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/****************************************************************************
**
** Copyright (C) 2022 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:COMM$
**
** 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.
**
** $QT_END_LICENSE$
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
******************************************************************************/
#ifndef QSHAREDMEMORY_H
#define QSHAREDMEMORY_H
#include <QtCore/qglobal.h>
#ifndef QT_NO_QOBJECT
# include <QtCore/qobject.h>
#else
# include <QtCore/qobjectdefs.h>
# include <QtCore/qscopedpointer.h>
# include <QtCore/qstring.h>
#endif
QT_BEGIN_NAMESPACE
#ifndef QT_NO_SHAREDMEMORY
class QSharedMemoryPrivate;
class Q_CORE_EXPORT QSharedMemory
#ifndef QT_NO_QOBJECT
: public QObject
#endif
{
#ifndef QT_NO_QOBJECT
Q_OBJECT
#endif
Q_DECLARE_PRIVATE(QSharedMemory)
public:
enum AccessMode
{
ReadOnly,
ReadWrite
};
enum SharedMemoryError
{
NoError,
PermissionDenied,
InvalidSize,
KeyError,
AlreadyExists,
NotFound,
LockError,
OutOfResources,
UnknownError
};
#ifndef QT_NO_QOBJECT
QSharedMemory(QObject *parent = nullptr);
QSharedMemory(const QString &key, QObject *parent = nullptr);
#else
QSharedMemory();
QSharedMemory(const QString &key);
static QString tr(const char * str)
{
return QString::fromLatin1(str);
}
#endif
~QSharedMemory();
void setKey(const QString &key);
QString key() const;
void setNativeKey(const QString &key);
QString nativeKey() const;
bool create(qsizetype size, AccessMode mode = ReadWrite);
qsizetype 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)
#ifdef QT_NO_QOBJECT
QScopedPointer<QSharedMemoryPrivate> d_ptr;
#endif
};
#endif // QT_NO_SHAREDMEMORY
QT_END_NAMESPACE
#endif // QSHAREDMEMORY_H
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