/****************************************************************************
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** Copyright (C) 2009 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.
**
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** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
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****************************************************************************/

#ifndef QSYSTEMSEMAPHORE_P_H
#define QSYSTEMSEMAPHORE_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 "qsystemsemaphore.h"

#ifndef QT_NO_SYSTEMSEMAPHORE

#include "qsharedmemory_p.h"
#ifndef Q_OS_WINCE
#   include <sys/types.h>
#endif

QT_BEGIN_NAMESPACE

class QSystemSemaphorePrivate
{

public:
    QSystemSemaphorePrivate();

    QString makeKeyFileName()
    {
        return QSharedMemoryPrivate::makePlatformSafeKey(key, QLatin1String("qipc_systemsem_"));
    }

#ifdef Q_OS_WIN
    HANDLE handle(QSystemSemaphore::AccessMode mode = QSystemSemaphore::Open);
#else
    key_t handle(QSystemSemaphore::AccessMode mode = QSystemSemaphore::Open);
#endif
    void setErrorString(const QString &function);
    void cleanHandle();
    bool modifySemaphore(int count);

    QString key;
    QString fileName;
    int initialValue;
#ifdef Q_OS_WIN
    HANDLE semaphore;
    HANDLE semaphoreLock;
#else
    int semaphore;
    bool createdFile;
    bool createdSemaphore;
    key_t unix_key;
#endif

    QString errorString;
    QSystemSemaphore::SystemSemaphoreError error;
};

#endif // QT_NO_SYSTEMSEMAPHORE


QT_END_NAMESPACE
#endif // QSYSTEMSEMAPHORE_P_H

