| 1 | /**************************************************************************** |
| 2 | ** |
| 3 | ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). |
| 4 | ** All rights reserved. |
| 5 | ** |
| 6 | ** Contact: Nokia Corporation (qt-info@nokia.com) |
| 7 | ** |
| 8 | ** This file is part of a Qt Solutions component. |
| 9 | ** |
| 10 | ** You may use this file under the terms of the BSD license as follows: |
| 11 | ** |
| 12 | ** "Redistribution and use in source and binary forms, with or without |
| 13 | ** modification, are permitted provided that the following conditions are |
| 14 | ** met: |
| 15 | ** * Redistributions of source code must retain the above copyright |
| 16 | ** notice, this list of conditions and the following disclaimer. |
| 17 | ** * Redistributions in binary form must reproduce the above copyright |
| 18 | ** notice, this list of conditions and the following disclaimer in |
| 19 | ** the documentation and/or other materials provided with the |
| 20 | ** distribution. |
| 21 | ** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor |
| 22 | ** the names of its contributors may be used to endorse or promote |
| 23 | ** products derived from this software without specific prior written |
| 24 | ** permission. |
| 25 | ** |
| 26 | ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 27 | ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 28 | ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 29 | ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 30 | ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 31 | ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 32 | ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 33 | ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 34 | ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 35 | ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 36 | ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." |
| 37 | ** |
| 38 | ****************************************************************************/ |
| 39 | |
| 40 | #ifndef QTLOCKEDFILE_H |
| 41 | #define QTLOCKEDFILE_H |
| 42 | |
| 43 | #include <QtCore/QFile> |
| 44 | #ifdef Q_OS_WIN |
| 45 | #include <QtCore/QVector> |
| 46 | #endif |
| 47 | |
| 48 | #if defined(Q_WS_WIN) |
| 49 | # if !defined(QT_QTLOCKEDFILE_EXPORT) && !defined(QT_QTLOCKEDFILE_IMPORT) |
| 50 | # define QT_QTLOCKEDFILE_EXPORT |
| 51 | # elif defined(QT_QTLOCKEDFILE_IMPORT) |
| 52 | # if defined(QT_QTLOCKEDFILE_EXPORT) |
| 53 | # undef QT_QTLOCKEDFILE_EXPORT |
| 54 | # endif |
| 55 | # define QT_QTLOCKEDFILE_EXPORT __declspec(dllimport) |
| 56 | # elif defined(QT_QTLOCKEDFILE_EXPORT) |
| 57 | # undef QT_QTLOCKEDFILE_EXPORT |
| 58 | # define QT_QTLOCKEDFILE_EXPORT __declspec(dllexport) |
| 59 | # endif |
| 60 | #else |
| 61 | # define QT_QTLOCKEDFILE_EXPORT |
| 62 | #endif |
| 63 | |
| 64 | namespace QtLP_Private { |
| 65 | |
| 66 | class QT_QTLOCKEDFILE_EXPORT QtLockedFile : public QFile |
| 67 | { |
| 68 | public: |
| 69 | enum LockMode { NoLock = 0, ReadLock, WriteLock }; |
| 70 | |
| 71 | QtLockedFile(); |
| 72 | QtLockedFile(const QString &name); |
| 73 | ~QtLockedFile(); |
| 74 | |
| 75 | bool open(OpenMode mode); |
| 76 | |
| 77 | bool lock(LockMode mode, bool block = true); |
| 78 | bool unlock(); |
| 79 | bool isLocked() const; |
| 80 | LockMode lockMode() const; |
| 81 | |
| 82 | private: |
| 83 | #ifdef Q_OS_WIN |
| 84 | Qt::HANDLE wmutex; |
| 85 | Qt::HANDLE rmutex; |
| 86 | QVector<Qt::HANDLE> rmutexes; |
| 87 | QString mutexname; |
| 88 | |
| 89 | Qt::HANDLE getMutexHandle(int idx, bool doCreate); |
| 90 | bool waitMutex(Qt::HANDLE mutex, bool doBlock); |
| 91 | |
| 92 | #endif |
| 93 | LockMode m_lock_mode; |
| 94 | }; |
| 95 | } |
| 96 | #endif |