Long live Qt!

3 files changed, 474 insertions, 0 deletions

diff --git a/tests/auto/qmutex/.gitignore b/tests/auto/qmutex/.gitignore
new file mode 100644
index 0000000..2f6b741
--- /dev/null
+++ b/tests/auto/qmutex/.gitignore
@@ -0,0 +1 @@
+tst_qmutex
diff --git a/tests/auto/qmutex/qmutex.pro b/tests/auto/qmutex/qmutex.pro
new file mode 100644
index 0000000..e52f947
--- /dev/null
+++ b/tests/auto/qmutex/qmutex.pro
@@ -0,0 +1,5 @@
+load(qttest_p4)
+SOURCES += tst_qmutex.cpp
+QT = core
+
+
diff --git a/tests/auto/qmutex/tst_qmutex.cpp b/tests/auto/qmutex/tst_qmutex.cpp
new file mode 100644
index 0000000..16f3cba
--- /dev/null
+++ b/tests/auto/qmutex/tst_qmutex.cpp
@@ -0,0 +1,468 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+#include <QtTest/QtTest>
+
+#include <qatomic.h>
+#include <qcoreapplication.h>
+#include <qdatetime.h>
+#include <qmutex.h>
+#include <qthread.h>
+#include <qwaitcondition.h>
+
+
+
+//TESTED_CLASS=
+//TESTED_FILES=
+
+class tst_QMutex : public QObject
+{
+    Q_OBJECT
+
+public:
+    tst_QMutex();
+    virtual ~tst_QMutex();
+
+private slots:
+    void tryLock();
+    void lock_unlock_locked_tryLock();
+    void stressTest();
+    void tryLockRace();
+};
+
+static const int iterations = 100;
+
+tst_QMutex::tst_QMutex()
+
+{
+}
+
+tst_QMutex::~tst_QMutex()
+{
+}
+
+QAtomicInt lockCount(0);
+QMutex normalMutex, recursiveMutex(QMutex::Recursive);
+QSemaphore testsTurn;
+QSemaphore threadsTurn;
+
+void tst_QMutex::tryLock()
+{
+    // test non-recursive mutex
+    {
+        class Thread : public QThread
+        {
+        public:
+            void run()
+            {
+                testsTurn.release();
+
+                threadsTurn.acquire();
+                QVERIFY(!normalMutex.tryLock());
+                testsTurn.release();
+
+                threadsTurn.acquire();
+                QVERIFY(normalMutex.tryLock());
+                QVERIFY(lockCount.testAndSetRelaxed(0, 1));
+                QVERIFY(!normalMutex.tryLock());
+                QVERIFY(lockCount.testAndSetRelaxed(1, 0));
+                normalMutex.unlock();
+                testsTurn.release();
+
+                threadsTurn.acquire();
+                QTime timer;
+                timer.start();
+                QVERIFY(!normalMutex.tryLock(1000));
+                QVERIFY(timer.elapsed() >= 1000);
+                testsTurn.release();
+
+                threadsTurn.acquire();
+                timer.start();
+                QVERIFY(normalMutex.tryLock(1000));
+                QVERIFY(timer.elapsed() <= 1000);
+                QVERIFY(lockCount.testAndSetRelaxed(0, 1));
+                timer.start();
+                QVERIFY(!normalMutex.tryLock(1000));
+                QVERIFY(timer.elapsed() >= 1000);
+                QVERIFY(lockCount.testAndSetRelaxed(1, 0));
+                normalMutex.unlock();
+                testsTurn.release();
+
+                threadsTurn.acquire();
+            }
+        };
+
+        Thread thread;
+        thread.start();
+
+        testsTurn.acquire();
+        normalMutex.lock();
+        QVERIFY(lockCount.testAndSetRelaxed(0, 1));
+        threadsTurn.release();
+
+        testsTurn.acquire();
+        QVERIFY(lockCount.testAndSetRelaxed(1, 0));
+        normalMutex.unlock();
+        threadsTurn.release();
+
+        testsTurn.acquire();
+        normalMutex.lock();
+        QVERIFY(lockCount.testAndSetRelaxed(0, 1));
+        threadsTurn.release();
+
+        testsTurn.acquire();
+        QVERIFY(lockCount.testAndSetRelaxed(1, 0));
+        normalMutex.unlock();
+        threadsTurn.release();
+
+        // wait for thread to finish
+        testsTurn.acquire();
+        threadsTurn.release();
+        thread.wait();
+    }
+
+    // test recursive mutex
+    {
+        class Thread : public QThread
+        {
+        public:
+            void run()
+            {
+                testsTurn.release();
+
+                threadsTurn.acquire();
+                QVERIFY(!recursiveMutex.tryLock());
+                testsTurn.release();
+
+                threadsTurn.acquire();
+                QVERIFY(recursiveMutex.tryLock());
+                QVERIFY(lockCount.testAndSetRelaxed(0, 1));
+                QVERIFY(recursiveMutex.tryLock());
+                QVERIFY(lockCount.testAndSetRelaxed(1, 2));
+                QVERIFY(lockCount.testAndSetRelaxed(2, 1));
+                recursiveMutex.unlock();
+                QVERIFY(lockCount.testAndSetRelaxed(1, 0));
+                recursiveMutex.unlock();
+                testsTurn.release();
+
+                threadsTurn.acquire();
+                QTime timer;
+                timer.start();
+                QVERIFY(!recursiveMutex.tryLock(1000));
+                QVERIFY(timer.elapsed() >= 1000);
+                testsTurn.release();
+
+                threadsTurn.acquire();
+                timer.start();
+                QVERIFY(recursiveMutex.tryLock(1000));
+                QVERIFY(timer.elapsed() <= 1000);
+                QVERIFY(lockCount.testAndSetRelaxed(0, 1));
+                QVERIFY(recursiveMutex.tryLock(1000));
+                QVERIFY(lockCount.testAndSetRelaxed(1, 2));
+                QVERIFY(lockCount.testAndSetRelaxed(2, 1));
+                recursiveMutex.unlock();
+                QVERIFY(lockCount.testAndSetRelaxed(1, 0));
+                recursiveMutex.unlock();
+                testsTurn.release();
+
+                threadsTurn.acquire();
+            }
+        };
+
+        Thread thread;
+        thread.start();
+
+        testsTurn.acquire();
+        recursiveMutex.lock();
+        QVERIFY(lockCount.testAndSetRelaxed(0, 1));
+        recursiveMutex.lock();
+        QVERIFY(lockCount.testAndSetRelaxed(1, 2));
+        threadsTurn.release();
+
+        testsTurn.acquire();
+        QVERIFY(lockCount.testAndSetRelaxed(2, 1));
+        recursiveMutex.unlock();
+        QVERIFY(lockCount.testAndSetRelaxed(1, 0));
+        recursiveMutex.unlock();
+        threadsTurn.release();
+
+        testsTurn.acquire();
+        recursiveMutex.lock();
+        QVERIFY(lockCount.testAndSetRelaxed(0, 1));
+        recursiveMutex.lock();
+        QVERIFY(lockCount.testAndSetRelaxed(1, 2));
+        threadsTurn.release();
+
+        testsTurn.acquire();
+        QVERIFY(lockCount.testAndSetRelaxed(2, 1));
+        recursiveMutex.unlock();
+        QVERIFY(lockCount.testAndSetRelaxed(1, 0));
+        recursiveMutex.unlock();
+        threadsTurn.release();
+
+        // stop thread
+        testsTurn.acquire();
+        threadsTurn.release();
+        thread.wait();
+    }
+}
+
+class mutex_Thread : public QThread
+{
+public:
+    QMutex mutex;
+    QWaitCondition cond;
+
+    QMutex &test_mutex;
+
+    inline mutex_Thread(QMutex &m) : test_mutex(m) { }
+
+    void run()
+    {
+	test_mutex.lock();
+
+	mutex.lock();
+	for (int i = 0; i < iterations; ++i) {
+	    cond.wakeOne();
+	    cond.wait(&mutex);
+	}
+	mutex.unlock();
+
+    	test_mutex.unlock();
+    }
+};
+
+class rmutex_Thread : public QThread
+{
+public:
+    QMutex mutex;
+    QWaitCondition cond;
+
+    QMutex &test_mutex;
+
+    inline rmutex_Thread(QMutex &m) : test_mutex(m) { }
+
+    void run()
+    {
+	test_mutex.lock();
+	test_mutex.lock();
+	test_mutex.lock();
+	test_mutex.lock();
+
+	mutex.lock();
+	for (int i = 0; i < iterations; ++i) {
+	    cond.wakeOne();
+	    cond.wait(&mutex);
+	}
+	mutex.unlock();
+
+    	test_mutex.unlock();
+    	test_mutex.unlock();
+    	test_mutex.unlock();
+    	test_mutex.unlock();
+    }
+};
+
+#ifdef QT3_SUPPORT
+#define VERIFY_LOCKED(x) QVERIFY((x).locked())
+#define VERIFY_NLOCKED(x) QVERIFY(!(x).locked())
+#else
+#define VERIFY_LOCKED(x)
+#define VERIFY_NLOCKED(x)
+#endif // QT3_SUPPORT
+
+void tst_QMutex::lock_unlock_locked_tryLock()
+{
+    // normal mutex
+    QMutex mutex;
+    mutex_Thread thread(mutex);
+
+    QMutex rmutex(QMutex::Recursive);
+    rmutex_Thread rthread(rmutex);
+
+    for (int i = 0; i < iterations; ++i) {
+	// normal mutex
+	VERIFY_NLOCKED(mutex);
+	QVERIFY(mutex.tryLock());
+	mutex.unlock();
+
+	thread.mutex.lock();
+	thread.start();
+
+	for (int j = 0; j < iterations; ++j) {
+	    QVERIFY(thread.cond.wait(&thread.mutex, 10000));
+	    VERIFY_LOCKED(mutex);
+	    QVERIFY(!mutex.tryLock());
+
+	    thread.cond.wakeOne();
+	}
+
+	thread.mutex.unlock();
+
+	QVERIFY(thread.wait(10000));
+        VERIFY_NLOCKED(mutex);
+	QVERIFY(mutex.tryLock());
+
+	mutex.unlock();
+
+    	// recursive mutex
+        VERIFY_NLOCKED(rmutex);
+	QVERIFY(rmutex.tryLock());
+	QVERIFY(rmutex.tryLock());
+	QVERIFY(rmutex.tryLock());
+	QVERIFY(rmutex.tryLock());
+
+	rmutex.unlock();
+	rmutex.unlock();
+	rmutex.unlock();
+	rmutex.unlock();
+
+	rthread.mutex.lock();
+	rthread.start();
+
+	for (int k = 0; k < iterations; ++k) {
+	    QVERIFY(rthread.cond.wait(&rthread.mutex, 10000));
+            VERIFY_LOCKED(rmutex);
+	    QVERIFY(!rmutex.tryLock());
+
+	    rthread.cond.wakeOne();
+	}
+
+	rthread.mutex.unlock();
+
+	QVERIFY(rthread.wait(10000));
+        VERIFY_NLOCKED(rmutex);
+	QVERIFY(rmutex.tryLock());
+	QVERIFY(rmutex.tryLock());
+	QVERIFY(rmutex.tryLock());
+	QVERIFY(rmutex.tryLock());
+
+	rmutex.unlock();
+	rmutex.unlock();
+	rmutex.unlock();
+	rmutex.unlock();
+    }
+}
+
+enum { one_minute = 60 * 1000, threadCount = 10 };
+
+class StressTestThread : public QThread
+{
+    QTime t;
+public:
+    static QBasicAtomicInt lockCount;
+    static QBasicAtomicInt sentinel;
+    static QMutex mutex;
+    void start()
+    {
+        t.start();
+        QThread::start();
+    }
+    void run()
+    {
+        while (t.elapsed() < one_minute) {
+            mutex.lock();
+            Q_ASSERT(!sentinel.ref());
+            Q_ASSERT(sentinel.deref());
+            lockCount.ref();
+            mutex.unlock();
+            if (mutex.tryLock()) {
+                Q_ASSERT(!sentinel.ref());
+                Q_ASSERT(sentinel.deref());
+                lockCount.ref();
+                mutex.unlock();
+            }
+        }
+    }
+};
+QMutex StressTestThread::mutex;
+QBasicAtomicInt StressTestThread::lockCount = Q_BASIC_ATOMIC_INITIALIZER(0);
+QBasicAtomicInt StressTestThread::sentinel = Q_BASIC_ATOMIC_INITIALIZER(-1);
+
+void tst_QMutex::stressTest()
+{
+    StressTestThread threads[threadCount];
+    for (int i = 0; i < threadCount; ++i)
+        threads[i].start();
+    QVERIFY(threads[0].wait(one_minute + 10000));
+    for (int i = 1; i < threadCount; ++i)
+        QVERIFY(threads[i].wait(10000));
+    qDebug("locked %d times", int(StressTestThread::lockCount));
+}
+
+class TryLockRaceThread : public QThread
+{
+public:
+    static QMutex mutex;
+
+    void run()
+    {
+        QTime t;
+        t.start();
+        do {
+            if (mutex.tryLock())
+                mutex.unlock();
+        } while (t.elapsed() < 20000);
+    }
+};
+QMutex TryLockRaceThread::mutex;
+
+void tst_QMutex::tryLockRace()
+{
+    // mutex not in use, should be able to lock it
+    QVERIFY(TryLockRaceThread::mutex.tryLock());
+    TryLockRaceThread::mutex.unlock();
+
+    // try to break tryLock
+    TryLockRaceThread thread[threadCount];
+    for (int i = 0; i < threadCount; ++i)
+        thread[i].start();
+    for (int i = 0; i < threadCount; ++i)
+        QVERIFY(thread[i].wait());
+
+    // mutex not in use, should be able to lock it
+    QVERIFY(TryLockRaceThread::mutex.tryLock());
+    TryLockRaceThread::mutex.unlock();
+}
+
+QTEST_MAIN(tst_QMutex)
+#include "tst_qmutex.moc"