| /**************************************************************************** |
| ** |
| ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). |
| ** All rights reserved. |
| ** Contact: Nokia Corporation (qt-info@nokia.com) |
| ** |
| ** This file is part of the QtGui 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. |
| ** |
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| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| |
| #ifndef QLOCK_P_H |
| #define QLOCK_P_H |
| |
| // |
| // W A R N I N G |
| // ------------- |
| // |
| // This file is not part of the Qt API. This header file may |
| // change from version to version without notice, or even be |
| // removed. |
| // |
| // We mean it. |
| // |
| |
| #include "QtCore/qstring.h" |
| |
| QT_BEGIN_NAMESPACE |
| |
| class QLockData; |
| |
| class Q_GUI_EXPORT QLock |
| { |
| public: |
| QLock(const QString &filename, char id, bool create = false); |
| ~QLock(); |
| |
| enum Type { Read, Write }; |
| |
| bool isValid() const; |
| void lock(Type type); |
| void unlock(); |
| bool locked() const; |
| |
| private: |
| Type type; |
| QLockData *data; |
| }; |
| |
| |
| // Nice class for ensuring the lock is released. |
| // Just create one on the stack and the lock is automatically released |
| // when QLockHandle is destructed. |
| class Q_GUI_EXPORT QLockHandle |
| { |
| public: |
| QLockHandle(QLock *l, QLock::Type type) : qlock(l) { qlock->lock(type); } |
| ~QLockHandle() { if (locked()) qlock->unlock(); } |
| |
| void lock(QLock::Type type) { qlock->lock(type); } |
| void unlock() { qlock->unlock(); } |
| bool locked() const { return qlock->locked(); } |
| |
| private: |
| QLock *qlock; |
| }; |
| |
| QT_END_NAMESPACE |
| |
| #endif // QLOCK_P_H |