qsharedmemory.h
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- /****************************************************************************
- **
- ** Copyright (C) 2008 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.
- **
- ** Commercial Usage
- ** Licensees holding valid Qt Commercial licenses may use this file in
- ** accordance with the Qt Commercial License Agreement provided with the
- ** Software or, alternatively, in accordance with the terms contained in
- ** a written agreement between you and Nokia.
- **
- **
- ** GNU General Public License Usage
- ** Alternatively, this file may be used under the terms of the GNU
- ** General Public License versions 2.0 or 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 GNU General Public Licensing requirements will be met:
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- ** http://www.gnu.org/copyleft/gpl.html. In addition, as a special
- ** exception, Nokia gives you certain additional rights. These rights
- ** are described in the Nokia Qt GPL Exception version 1.3, included in
- ** the file GPL_EXCEPTION.txt in this package.
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- ****************************************************************************/
- #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