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2 **
3 ** Copyright (C) 2015 The Qt Company Ltd.
4 ** Contact: http://www.qt.io/licensing/
5 **
6 ** This file is part of the documentation of the Qt Toolkit.
7 **
8 ** $QT_BEGIN_LICENSE:BSD$
9 ** You may use this file under the terms of the BSD license as follows:
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12 ** modification, are permitted provided that the following conditions are
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39 ****************************************************************************/
40
41 //! [0]
42 QReadWriteLock lock;
43
run()44 void ReaderThread::run()
45 {
46 ...
47 lock.lockForRead();
48 read_file();
49 lock.unlock();
50 ...
51 }
52
run()53 void WriterThread::run()
54 {
55 ...
56 lock.lockForWrite();
57 write_file();
58 lock.unlock();
59 ...
60 }
61 //! [0]
62
63
64 //! [1]
65 QReadWriteLock lock;
66
readData()67 QByteArray readData()
68 {
69 QReadLocker locker(&lock);
70 ...
71 return data;
72 }
73 //! [1]
74
75
76 //! [2]
77 QReadWriteLock lock;
78
readData()79 QByteArray readData()
80 {
81 lock.lockForRead();
82 ...
83 lock.unlock();
84 return data;
85 }
86 //! [2]
87
88
89 //! [3]
90 QReadWriteLock lock;
91
writeData(const QByteArray & data)92 void writeData(const QByteArray &data)
93 {
94 QWriteLocker locker(&lock);
95 ...
96 }
97 //! [3]
98
99
100 //! [4]
101 QReadWriteLock lock;
102
writeData(const QByteArray & data)103 void writeData(const QByteArray &data)
104 {
105 lock.lockForWrite();
106 ...
107 lock.unlock();
108 }
109 //! [4]
110