/****************************************************************************

**

** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the QtCore module of the Qt Toolkit.

**

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** GNU Lesser General Public License Usage

** This file may be used under the terms of the GNU Lesser General Public

** License version 2.1 as published by the Free Software Foundation and

** appearing in the file LICENSE.LGPL included in the packaging of this

** file. Please review the following information to ensure the GNU Lesser

** General Public License version 2.1 requirements will be met:

** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** In addition, as a special exception, Nokia gives you certain additional

** rights. These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

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** GNU General Public License Usage

** Alternatively, this file may be used under the terms of the GNU General

** Public License version 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 the GNU General

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** http://www.gnu.org/copyleft/gpl.html.

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** $QT_END_LICENSE$

**

****************************************************************************/

#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

#ifdef QT_POSIX_IPC

#  include <semaphore.h>

#endif

#ifdef Q_OS_SYMBIAN

class RSemaphore;

#endif

QT_BEGIN_NAMESPACE

class QSystemSemaphorePrivate

{

public:

    QSystemSemaphorePrivate();

    inline QString makeKeyFileName() const

    {

        return QSharedMemoryPrivate::makePlatformSafeKey(key, QLatin1String("qipc_systemsem_"));

    }

#ifdef Q_OS_WIN

    HANDLE handle(QSystemSemaphore::AccessMode mode = QSystemSemaphore::Open);

    void setErrorString(const QString &function);

#elif defined(Q_OS_SYMBIAN)

    int handle(QSystemSemaphore::AccessMode mode = QSystemSemaphore::Open);

    void setErrorString(const QString &function,int err = 0);

#elif defined(QT_POSIX_IPC)

    bool handle(QSystemSemaphore::AccessMode mode = QSystemSemaphore::Open);

    void setErrorString(const QString &function);

#else

    key_t handle(QSystemSemaphore::AccessMode mode = QSystemSemaphore::Open);

    void setErrorString(const QString &function);

#endif

    void cleanHandle();

    bool modifySemaphore(int count);

    QString key;

    QString fileName;

    int initialValue;

#ifdef Q_OS_WIN

    HANDLE semaphore;

    HANDLE semaphoreLock;

#elif defined(Q_OS_SYMBIAN)

    RSemaphore semaphore;

#elif defined(QT_POSIX_IPC)

    sem_t *semaphore;

    bool createdSemaphore;

#else

    key_t unix_key;

    int semaphore;

    bool createdFile;

    bool createdSemaphore;

#endif

    QString errorString;

    QSystemSemaphore::SystemSemaphoreError error;

};

QT_END_NAMESPACE

#endif // QT_NO_SYSTEMSEMAPHORE

#endif // QSYSTEMSEMAPHORE_P_H