/**************************************************************************** | |
** | |
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). | |
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** 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 | |
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** file. Please review the following information to ensure the GNU Lesser | |
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** | |
** 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: | |
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** $QT_END_LICENSE$ | |
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****************************************************************************/ | |
#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 |