/****************************************************************************
**
** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 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:
** http://trolltech.com/products/qt/licenses/licensing/opensource/
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
** or contact the sales department at sales@trolltech.com.
**
** In addition, as a special exception, Trolltech gives you certain
** additional rights. These rights are described in the Trolltech GPL
** Exception version 1.0, which can be found at
** http://www.trolltech.com/products/qt/gplexception/ and in the file
** GPL_EXCEPTION.txt in this package.
**
** In addition, as a special exception, Trolltech, as the sole copyright
** holder for Qt Designer, grants users of the Qt/Eclipse Integration
** plug-in the right for the Qt/Eclipse Integration to link to
** functionality provided by Qt Designer and its related libraries.
**
** Trolltech reserves all rights not expressly granted herein.
** 
** Trolltech ASA (c) 2007
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/

#ifndef QSHAREDMEMORY_P_H
#define QSHAREDMEMORY_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists for the convenience
// of qapplication_qws.cpp and qgfxvnc_qws.cpp.  This header file may
// change from version to version without notice, or even be removed.
//
// We mean it.
//

#include "qplatformdefs.h"
#include "QtCore/qstring.h"

#if !defined(QT_NO_QWS_MULTIPROCESS)

class Q_CORE_EXPORT QSharedMemory {
public:

    QSharedMemory();
    ~QSharedMemory();

    void setPermissions(mode_t mode);
    int size() const;
    void *address() { return shmBase; };

    int id() const { return shmId; }

    void detach();

    bool create(int size);
    bool attach(int id);

    //bool create(int size, const QString &filename, char c = 'Q');
    //bool attach(const QString &filename, char c = 'Q');
// old API

    QSharedMemory(int, const QString &, char c = 'Q');
    void * base() { return address(); };

    bool create();
    void destroy();

    bool attach();

private:
    void *shmBase;
    int shmSize;
    QString shmFile;
    char character;
    int shmId;
    key_t key;
};

#endif // QT_NO_QWS_MULTIPROCESS

#endif // QSHAREDMEMORY_P_H