95 lines
3.2 KiB
C++
95 lines
3.2 KiB
C++
/****************************************************************************
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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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**
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of a Qt Solutions component.
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**
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
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** the names of its contributors may be used to endorse or promote
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** products derived from this software without specific prior written
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** permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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****************************************************************************/
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#ifndef QTLOCKEDFILE_H
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#define QTLOCKEDFILE_H
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#include <QFile>
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#ifdef Q_OS_WIN
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#include <QVector>
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#endif
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#if defined(Q_WS_WIN) || defined(Q_OS_WIN)
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# if !defined(QT_QTLOCKEDFILE_EXPORT) && !defined(QT_QTLOCKEDFILE_IMPORT)
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# define QT_QTLOCKEDFILE_EXPORT
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# elif defined(QT_QTLOCKEDFILE_IMPORT)
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# if defined(QT_QTLOCKEDFILE_EXPORT)
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# undef QT_QTLOCKEDFILE_EXPORT
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# endif
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# define QT_QTLOCKEDFILE_EXPORT __declspec(dllimport)
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# elif defined(QT_QTLOCKEDFILE_EXPORT)
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# undef QT_QTLOCKEDFILE_EXPORT
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# define QT_QTLOCKEDFILE_EXPORT __declspec(dllexport)
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# endif
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#else
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# define QT_QTLOCKEDFILE_EXPORT
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#endif
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class QT_QTLOCKEDFILE_EXPORT QtLockedFile : public QFile
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{
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public:
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enum LockMode { NoLock = 0, ReadLock, WriteLock };
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QtLockedFile();
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QtLockedFile(const QString &name);
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~QtLockedFile();
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bool open(OpenMode mode);
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bool lock(LockMode mode, bool block = true);
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bool unlock();
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bool isLocked() const;
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LockMode lockMode() const;
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private:
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#ifdef Q_OS_WIN
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Qt::HANDLE wmutex;
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Qt::HANDLE rmutex;
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QVector<Qt::HANDLE> rmutexes;
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QString mutexname;
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Qt::HANDLE getMutexHandle(int idx, bool doCreate);
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bool waitMutex(Qt::HANDLE mutex, bool doBlock);
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#endif
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LockMode m_lock_mode;
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};
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#endif
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