/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
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** This file is part of the QtGui module of the Qt Toolkit.
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
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****************************************************************************/

#ifndef QWSSHAREDMEMORY_P_H
#define QWSSHAREDMEMORY_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include <qplatformdefs.h>

QT_BEGIN_NAMESPACE

#if !defined(QT_NO_QWS_MULTIPROCESS)

class QWSSharedMemory
{
public:
    QWSSharedMemory();
    ~QWSSharedMemory();

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

    int id() const { return shmId; }

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

private:
    int shmId;
    void *shmBase;
    mutable int shmSize;
#ifdef QT_POSIX_IPC
    int hand;
#endif
};

#endif // QT_NO_QWS_MULTIPROCESS

QT_END_NAMESPACE

#endif // QWSSHAREDMEMORY_P_H