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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 |