1/****************************************************************************
2**
3** Copyright (C) 2013 David Faure <faure+bluesystems@kde.org>
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the test suite of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:GPL-EXCEPT$
9** Commercial License Usage
10** Licensees holding valid commercial Qt licenses may use this file in
11** accordance with the commercial license agreement provided with the
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13** a written agreement between you and The Qt Company. For licensing terms
14** and conditions see https://www.qt.io/terms-conditions. For further
15** information use the contact form at https://www.qt.io/contact-us.
16**
17** GNU General Public License Usage
18** Alternatively, this file may be used under the terms of the GNU
19** General Public License version 3 as published by the Free Software
20** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
21** included in the packaging of this file. Please review the following
22** information to ensure the GNU General Public License requirements will
23** be met: https://www.gnu.org/licenses/gpl-3.0.html.
24**
25** $QT_END_LICENSE$
26**
27****************************************************************************/
28
29#include <QDebug>
30#include <QCoreApplication>
31#include <QLockFile>
32#include <QThread>
33
34#ifdef Q_OS_UNIX
35# include <unistd.h>
36#else
37# include <stdlib.h>
38#endif
39
40int main(int argc, char *argv[])
41{
42 QCoreApplication app(argc, argv);
43
44 if (argc <= 1)
45 return -1;
46
47 const QString lockName = QString::fromLocal8Bit(str: argv[1]);
48
49 QString option;
50 if (argc > 2)
51 option = QString::fromLocal8Bit(str: argv[2]);
52
53 if (option == "-uncleanexit") {
54 QLockFile lockFile(lockName);
55 lockFile.lock();
56 // exit on purpose, so that the lock remains!
57 _exit(status: 0);
58 } else if (option == "-busy") {
59 QLockFile lockFile(lockName);
60 lockFile.lock();
61 QThread::msleep(500);
62 return 0;
63 } else {
64 QLockFile lockFile(lockName);
65 if (lockFile.isLocked()) // cannot happen, before calling lock or tryLock
66 return QLockFile::UnknownError;
67
68 lockFile.tryLock();
69 return lockFile.error();
70 }
71}
72

source code of qtbase/tests/auto/corelib/io/qlockfile/qlockfiletesthelper/qlockfile_test_helper.cpp