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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, 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, Digia gives you certain additional
** rights. These rights are described in the Digia 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.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QSYSTEMSEMAPHORE_H
#define QSYSTEMSEMAPHORE_H
#include <QtCore/qstring.h>
#include <QtCore/qscopedpointer.h>
QT_BEGIN_NAMESPACE
#ifndef QT_NO_SYSTEMSEMAPHORE
class QSystemSemaphorePrivate;
class Q_CORE_EXPORT QSystemSemaphore
{
public:
enum AccessMode
{
Open,
Create
};
enum SystemSemaphoreError
{
NoError,
PermissionDenied,
KeyError,
AlreadyExists,
NotFound,
OutOfResources,
UnknownError
};
QSystemSemaphore(const QString &key, int initialValue = 0, AccessMode mode = Open);
~QSystemSemaphore();
void setKey(const QString &key, int initialValue = 0, AccessMode mode = Open);
QString key() const;
bool acquire();
bool release(int n = 1);
SystemSemaphoreError error() const;
QString errorString() const;
private:
Q_DISABLE_COPY(QSystemSemaphore)
QScopedPointer<QSystemSemaphorePrivate> d;
};
#endif // QT_NO_SYSTEMSEMAPHORE
QT_END_NAMESPACE
#endif // QSYSTEMSEMAPHORE_H
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