src/gui/embedded/qwslock_p.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Fri, 19 Feb 2010 23:40:16 +0200
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/****************************************************************************
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**
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the QtGui module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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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 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL 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 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights.  These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef QWSLOCK_P_H
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#define QWSLOCK_P_H
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//
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//  W A R N I N G
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//  -------------
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//
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// This file is not part of the Qt API.  This header file may
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// change from version to version without notice, or even be
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// removed.
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//
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// We mean it.
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//
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#include <qglobal.h>
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QT_BEGIN_NAMESPACE
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#ifndef QT_NO_QWS_MULTIPROCESS
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class QWSLock
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{
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public:
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    enum LockType { BackingStore, Communication, RegionEvent };
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    QWSLock();
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    QWSLock(int lockId);
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    ~QWSLock();
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    bool lock(LockType type, int timeout = -1);
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    void unlock(LockType type);
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    bool wait(LockType type, int timeout = -1);
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    bool hasLock(LockType type);
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    int id() const { return semId; }
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private:
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    int semId;
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    int lockCount[2];
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};
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QT_END_NAMESPACE
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#endif // QT_NO_QWS_MULTIPROCESS
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#endif // QWSLOCK_P_H