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95a8be4470
the PID check was racy, bonus points for not writing data at all to the lock and not reading it meaning less disk I/O oh, yes - by using O_CLOEXEC the lock is stale-safe Signed-off-by: Ivailo Monev <xakepa10@gmail.com>
76 lines
2.1 KiB
C++
76 lines
2.1 KiB
C++
/* This file is part of the KDE libraries
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Copyright (c) 2005 Thomas Braxton <brax108@cox.net>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License version 2 as published by the Free Software Foundation.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#include "klockfiletest.h"
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#include "moc_klockfiletest.cpp"
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#include <kdebug.h>
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#include <QProcess>
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#include <QTextStream>
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#include <unistd.h>
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// TODO test locking from two different threads
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static const QString lockName = "klockfiletest";
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static const char *const lockNameFull = "klockfiletest.klockfile";
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void Test_KLockFile::initTestCase()
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{
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QFile::remove(QString::fromLatin1(lockNameFull));
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lockFile = new KLockFile(lockName);
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}
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void Test_KLockFile::cleanupTestCase()
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{
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delete lockFile;
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lockFile = nullptr;
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}
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static bool testLockFromProcess(const QString& lockName)
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{
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const int ret = QProcess::execute(KDEBINDIR "/kdecore-klockfile_testlock", QStringList() << lockName);
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return bool(ret);
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}
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void Test_KLockFile::testLock()
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{
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QVERIFY(!lockFile->isLocked());
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QCOMPARE(lockFile->tryLock(), true);
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QVERIFY(lockFile->isLocked());
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// Try to lock it again, should fail
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KLockFile *lockFile2 = new KLockFile(lockName);
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QVERIFY(!lockFile2->isLocked());
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QCOMPARE(lockFile2->tryLock(), false);
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QVERIFY(!lockFile2->isLocked());
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delete lockFile2;
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// Also try from a different process.
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QCOMPARE(testLockFromProcess(lockName), false);
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}
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void Test_KLockFile::testUnlock()
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{
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QVERIFY(lockFile->isLocked());
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lockFile->unlock();
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QVERIFY(!lockFile->isLocked());
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}
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QTEST_KDEMAIN_CORE(Test_KLockFile)
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