/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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.
**
** 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
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#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

QT_BEGIN_NAMESPACE

class QSystemSemaphorePrivate
{

public:
    QSystemSemaphorePrivate();

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

#ifdef Q_OS_WIN
    Qt::HANDLE 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
    Qt::HANDLE semaphore;
    Qt::HANDLE semaphoreLock;
#else
    int semaphore;
    bool createdFile;
    bool createdSemaphore;
    key_t unix_key;
#endif
    QString errorString;
    QSystemSemaphore::SystemSemaphoreError error;
};

QT_END_NAMESPACE

#endif // QT_NO_SYSTEMSEMAPHORE

#endif // QSYSTEMSEMAPHORE_P_H