97 lines
2.9 KiB
C++
97 lines
2.9 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the QtCore module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 3 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL3 included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 3 requirements
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** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 2.0 or (at your option) the GNU General
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** Public license version 3 or any later version approved by the KDE Free
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** Qt Foundation. The licenses are as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-2.0.html and
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** https://www.gnu.org/licenses/gpl-3.0.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef QSYSTEMSEMAPHORE_H
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#define QSYSTEMSEMAPHORE_H
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#include <QtCore/qstring.h>
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#include <QtCore/qscopedpointer.h>
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QT_BEGIN_NAMESPACE
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#ifndef QT_NO_SYSTEMSEMAPHORE
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class QSystemSemaphorePrivate;
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class Q_CORE_EXPORT QSystemSemaphore
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{
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public:
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enum AccessMode
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{
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Open,
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Create
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};
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enum SystemSemaphoreError
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{
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NoError,
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PermissionDenied,
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KeyError,
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AlreadyExists,
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NotFound,
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OutOfResources,
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UnknownError
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};
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QSystemSemaphore(const QString &key, int initialValue = 0, AccessMode mode = Open);
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~QSystemSemaphore();
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void setKey(const QString &key, int initialValue = 0, AccessMode mode = Open);
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QString key() const;
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bool acquire();
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bool release(int n = 1);
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SystemSemaphoreError error() const;
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QString errorString() const;
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private:
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Q_DISABLE_COPY(QSystemSemaphore)
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QScopedPointer<QSystemSemaphorePrivate> d;
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};
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#endif // QT_NO_SYSTEMSEMAPHORE
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QT_END_NAMESPACE
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#endif // QSYSTEMSEMAPHORE_H
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