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** This file is part of the test suite of the Qt Toolkit.

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****************************************************************************/

#include <QtTest/QtTest>

#include <QCoreApplication>

#include <QReadLocker>

#include <QSemaphore>

#include <QThread>

//TESTED_CLASS=

//TESTED_FILES=

class tst_QReadLockerThread : public QThread

{

public:

    QReadWriteLock lock;

    QSemaphore semaphore, testSemaphore;

    void waitForTest()

    {

        semaphore.release();

        testSemaphore.acquire();

    }

};

class tst_QReadLocker : public QObject

{

    Q_OBJECT

public:

    tst_QReadLocker();

    ~tst_QReadLocker();

    tst_QReadLockerThread *thread;

    void waitForThread()

    {

        thread->semaphore.acquire();

    }

    void releaseThread()

    {

        thread->testSemaphore.release();

    }

private slots:

    void scopeTest();

    void unlockAndRelockTest();

    void lockerStateTest();

};

tst_QReadLocker::tst_QReadLocker()

{

}

tst_QReadLocker::~tst_QReadLocker()

{

}

void tst_QReadLocker::scopeTest()

{

    class ScopeTestThread : public tst_QReadLockerThread

    {

    public:

        void run()

        {

            waitForTest();

            {

                QReadLocker locker(&lock);

                waitForTest();

            }

            waitForTest();

        }

    };

    thread = new ScopeTestThread;

    thread->start();

    waitForThread();

    // lock should be unlocked before entering the scope that creates the QReadLocker

    QVERIFY(thread->lock.tryLockForWrite());

    thread->lock.unlock();

    releaseThread();

    waitForThread();

    // lock should be locked by the QReadLocker

    QVERIFY(!thread->lock.tryLockForWrite());

    releaseThread();

    waitForThread();

    // lock should be unlocked when the QReadLocker goes out of scope

    QVERIFY(thread->lock.tryLockForWrite());

    thread->lock.unlock();

    releaseThread();

    QVERIFY(thread->wait());

    delete thread;

    thread = 0;

}

void tst_QReadLocker::unlockAndRelockTest()

{

    class UnlockAndRelockThread : public tst_QReadLockerThread

    {

    public:

        void run()

        {

            QReadLocker locker(&lock);

            waitForTest();

            locker.unlock();

            waitForTest();

            locker.relock();

            waitForTest();

        }

    };

    thread = new UnlockAndRelockThread;

    thread->start();

    waitForThread();

    // lock should be locked by the QReadLocker

    QVERIFY(!thread->lock.tryLockForWrite());

    releaseThread();

    waitForThread();

    // lock has been explicitly unlocked via QReadLocker

    QVERIFY(thread->lock.tryLockForWrite());

    thread->lock.unlock();

    releaseThread();

    waitForThread();

    // lock has been explicity relocked via QReadLocker

    QVERIFY(!thread->lock.tryLockForWrite());

    releaseThread();

    QVERIFY(thread->wait());

    delete thread;

    thread = 0;

}

void tst_QReadLocker::lockerStateTest()

{

    class LockerStateThread : public tst_QReadLockerThread

    {

    public:

        void run()

        {

            {

                QReadLocker locker(&lock);

                locker.relock();

                locker.unlock();

                waitForTest();

            }

            waitForTest();

        }

    };

    thread = new LockerStateThread;

    thread->start();

    waitForThread();

    // even though we relock() after creating the QReadLocker, it shouldn't lock the lock more than once

    QVERIFY(thread->lock.tryLockForWrite());

    thread->lock.unlock();

    releaseThread();

    waitForThread();

    // if we call QReadLocker::unlock(), its destructor should do nothing

    QVERIFY(thread->lock.tryLockForWrite());

    thread->lock.unlock();

    releaseThread();

    QVERIFY(thread->wait());

    delete thread;

    thread = 0;

}

QTEST_MAIN(tst_QReadLocker)

#include "tst_qreadlocker.moc"