/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the test suite of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#include <QtTest/QtTest>+
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+
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#include <QCoreApplication>+
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#include <QMutexLocker>+
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#include <QSemaphore>+
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#include <QThread>+
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+
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//TESTED_CLASS=+
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//TESTED_FILES=+
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+
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class tst_QMutexLockerThread : public QThread+
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{+
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public:+
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    QMutex mutex;+
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    QSemaphore semaphore, testSemaphore;+
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+
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    void waitForTest()+
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    {+
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        semaphore.release();+
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        testSemaphore.acquire();+
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    }+
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+
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    tst_QMutexLockerThread()+
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        : mutex(QMutex::Recursive)+
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    {+
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    }+
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};+
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+
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class tst_QMutexLocker : public QObject+
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{+
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    Q_OBJECT+
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+
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public:+
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    tst_QMutexLocker();+
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    ~tst_QMutexLocker();+
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+
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    tst_QMutexLockerThread *thread;+
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+
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    void waitForThread()+
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    {+
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        thread->semaphore.acquire();+
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    }+
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    void releaseThread()+
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    {+
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        thread->testSemaphore.release();+
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    }+
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+
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private slots:+
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    void scopeTest();+
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    void unlockAndRelockTest();+
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    void lockerStateTest();+
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};+
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+
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tst_QMutexLocker::tst_QMutexLocker()+
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{+
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}+
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+
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tst_QMutexLocker::~tst_QMutexLocker()+
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{+
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}+
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+
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void tst_QMutexLocker::scopeTest()+
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{+
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    class ScopeTestThread : public tst_QMutexLockerThread+
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    {+
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    public:+
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        void run()+
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        {+
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            waitForTest();+
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+
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            {+
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                QMutexLocker locker(&mutex);+
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                waitForTest();+
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            }+
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+
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            waitForTest();+
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        }+
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    };+
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+
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    thread = new ScopeTestThread;+
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    thread->start();+
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+
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    waitForThread();+
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    // mutex should be unlocked before entering the scope that creates the QMutexLocker+
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    QVERIFY(thread->mutex.tryLock());+
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    thread->mutex.unlock();+
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    releaseThread();+
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+
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    waitForThread();+
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    // mutex should be locked by the QMutexLocker+
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    QVERIFY(!thread->mutex.tryLock());+
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    releaseThread();+
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+
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    waitForThread();+
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    // mutex should be unlocked when the QMutexLocker goes out of scope+
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    QVERIFY(thread->mutex.tryLock());+
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    thread->mutex.unlock();+
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    releaseThread();+
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+
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    QVERIFY(thread->wait());+
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+
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    delete thread;+
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    thread = 0;+
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}+
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+
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+
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void tst_QMutexLocker::unlockAndRelockTest()+
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{+
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    class UnlockAndRelockThread : public tst_QMutexLockerThread+
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    {+
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    public:+
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        void run()+
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        {+
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            QMutexLocker locker(&mutex);+
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+
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            waitForTest();+
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+
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            locker.unlock();+
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+
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            waitForTest();+
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+
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            locker.relock();+
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+
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            waitForTest();+
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        }+
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    };+
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+
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    thread = new UnlockAndRelockThread;+
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    thread->start();+
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+
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    waitForThread();+
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    // mutex should be locked by the QMutexLocker+
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    QVERIFY(!thread->mutex.tryLock());+
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    releaseThread();+
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+
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    waitForThread();+
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    // mutex has been explicitly unlocked via QMutexLocker+
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    QVERIFY(thread->mutex.tryLock());+
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    thread->mutex.unlock();+
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    releaseThread();+
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+
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    waitForThread();+
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    // mutex has been explicity relocked via QMutexLocker+
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    QVERIFY(!thread->mutex.tryLock());+
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    releaseThread();+
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+
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    QVERIFY(thread->wait());+
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+
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    delete thread;+
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    thread = 0;+
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}+
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+
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void tst_QMutexLocker::lockerStateTest()+
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{+
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    class LockerStateThread : public tst_QMutexLockerThread+
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    {+
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    public:+
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        void run()+
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        {+
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            {+
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                QMutexLocker locker(&mutex);+
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                locker.relock();+
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                locker.unlock();+
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+
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                waitForTest();+
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            }+
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+
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            waitForTest();+
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        }+
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    };+
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+
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    thread = new LockerStateThread;+
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    thread->start();+
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+
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    waitForThread();+
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    // even though we relock() after creating the QMutexLocker, it shouldn't lock the mutex more than once+
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    QVERIFY(thread->mutex.tryLock());+
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    thread->mutex.unlock();+
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    releaseThread();+
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+
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    waitForThread();+
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    // if we call QMutexLocker::unlock(), its destructor should do nothing+
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    QVERIFY(thread->mutex.tryLock());+
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    thread->mutex.unlock();+
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    releaseThread();+
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+
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    QVERIFY(thread->wait());+
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+
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    delete thread;+
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    thread = 0;+
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}+
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+
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QTEST_MAIN(tst_QMutexLocker)+
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#include "tst_qmutexlocker.moc"+
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