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/****************************************************************************
**
** Copyright (C) 2022 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:COMM$
**
** 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 The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** $QT_END_LICENSE$
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
******************************************************************************/
#ifndef QSYSTEMSEMAPHORE_H
#define QSYSTEMSEMAPHORE_H
#include <QtCore/qcoreapplication.h>
#include <QtCore/qstring.h>
#include <QtCore/qscopedpointer.h>
QT_BEGIN_NAMESPACE
#ifndef QT_NO_SYSTEMSEMAPHORE
class QSystemSemaphorePrivate;
class Q_CORE_EXPORT QSystemSemaphore
{
Q_DECLARE_TR_FUNCTIONS(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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