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#include <QtCore>

#include <QtTest/QtTest>

enum { OneMinute = 60 * 1000,

       TwoMinutes = OneMinute * 2,

       TenMinutes = OneMinute * 10,

       TwentyFiveMinutes = OneMinute * 25 };

class tst_QObjectRace: public QObject

{

    Q_OBJECT

private slots:

    void moveToThreadRace();

    void destroyRace();

};

class RaceObject : public QObject

{

    Q_OBJECT

    QList<QThread *> threads;

    int count;

public:

    RaceObject()

        : count(0)

    { }

    void addThread(QThread *thread)

    { threads.append(thread); }

public slots:

    void theSlot()

    {

        enum { step = 35 };

        if ((++count % step) == 0) {

            QThread *nextThread = threads.at((count / step) % threads.size());

            moveToThread(nextThread);

        }

    }

    void destroSlot() {

        emit theSignal();

    }

signals:

    void theSignal();

};

class RaceThread : public QThread

{

    Q_OBJECT

    RaceObject *object;

    QTime stopWatch;

public:

    RaceThread()

        : object(0)

    { }

    void setObject(RaceObject *o)

    {

        object = o;

        object->addThread(this);

    }

    void start() {

        stopWatch.start();

        QThread::start();

    }

    void run() {

        QTimer zeroTimer;

        connect(&zeroTimer, SIGNAL(timeout()), object, SLOT(theSlot()));

        connect(&zeroTimer, SIGNAL(timeout()), this, SLOT(checkStopWatch()), Qt::DirectConnection);

        zeroTimer.start(0);

        (void) exec();

    }

signals:

    void theSignal();

private slots:

    void checkStopWatch()

    {

#if defined(Q_OS_WINCE) || defined(Q_OS_VXWORKS)

        if (stopWatch.elapsed() >= OneMinute / 2)

#else

        if (stopWatch.elapsed() >= OneMinute)

#endif

            quit();

        QObject o;

        connect(&o, SIGNAL(destroyed()) , object, SLOT(destroSlot()));

        connect(object, SIGNAL(destroyed()) , &o, SLOT(deleteLater()));

    }

};

void tst_QObjectRace::moveToThreadRace()

{

#if defined(Q_OS_SYMBIAN)

    // ### FIXME: task 257411 - remove xfail once this is fixed

    QEXPECT_FAIL("", "Symbian event dispatcher can't handle this kind of race, see task: 257411", Abort);

    QVERIFY(false);

#endif

    RaceObject *object = new RaceObject;

    enum { ThreadCount = 6 };

    RaceThread *threads[ThreadCount];

    for (int i = 0; i < ThreadCount; ++i) {

        threads[i] = new RaceThread;

        threads[i]->setObject(object);

    }

    object->moveToThread(threads[0]);

    for (int i = 0; i < ThreadCount; ++i)

        threads[i]->start();

    while(!threads[0]->isFinished()) {

        QPointer<RaceObject> foo (object);

        QObject o;

        connect(&o, SIGNAL(destroyed()) , object, SLOT(destroSlot()));

        connect(object, SIGNAL(destroyed()) , &o, SLOT(deleteLater()));

        QTest::qWait(10);

    }

    // the other threads should finish pretty quickly now

    for (int i = 1; i < ThreadCount; ++i)

        QVERIFY(threads[i]->wait(300));

    for (int i = 0; i < ThreadCount; ++i)

        delete threads[i];

    delete object;

}

class MyObject : public QObject

{   Q_OBJECT

    public slots:

        void slot1() { emit signal1(); }

        void slot2() { emit signal2(); }

        void slot3() { emit signal3(); }

        void slot4() { emit signal4(); }

        void slot5() { emit signal5(); }

        void slot6() { emit signal6(); }

        void slot7() { emit signal7(); }

    signals:

        void signal1();

        void signal2();

        void signal3();

        void signal4();

        void signal5();

        void signal6();

        void signal7();

};

class DestroyThread : public QThread

{

    Q_OBJECT

    QObject **objects;

    int number;

public:

    void setObjects(QObject **o, int n)

    {

        objects = o;

        number = n;

        for(int i = 0; i < number; i++)

            objects[i]->moveToThread(this);

    }

    void run() {

        for(int i = 0; i < number; i++)

            delete objects[i];

    }

};

#if defined(Q_OS_SYMBIAN)

// Symbian needs "a bit" more time

# define EXTRA_THREAD_WAIT TenMinutes

# define MAIN_THREAD_WAIT TwentyFiveMinutes

#else

# define EXTRA_THREAD_WAIT 3000

# define MAIN_THREAD_WAIT TwoMinutes

#endif

void tst_QObjectRace::destroyRace()

{

#if defined(Q_OS_SYMBIAN) && defined(Q_CC_NOKIAX86)

    // ### FIXME: task 257411 - remove xfail once this is fixed.

	// Oddly enough, this seems to work properly in HW, if given enough time and memory.

    QEXPECT_FAIL("", "Symbian event dispatcher can't handle this kind of race on emulator, see task: 257411", Abort);

    QVERIFY(false);

#endif

    enum { ThreadCount = 10, ObjectCountPerThread = 733,

           ObjectCount = ThreadCount * ObjectCountPerThread };

    const char *_slots[] = { SLOT(slot1()) , SLOT(slot2()) , SLOT(slot3()),

                             SLOT(slot4()) , SLOT(slot5()) , SLOT(slot6()),

                             SLOT(slot7()) };

    const char *_signals[] = { SIGNAL(signal1()), SIGNAL(signal2()), SIGNAL(signal3()),

                               SIGNAL(signal4()), SIGNAL(signal5()), SIGNAL(signal6()),

                               SIGNAL(signal7()) };

    QObject *objects[ObjectCount];

    for (int i = 0; i < ObjectCount; ++i)

        objects[i] = new MyObject;

    for (int i = 0; i < ObjectCount * 11; ++i) {

        connect(objects[(i*13) % ObjectCount], _signals[(2*i)%7],

                objects[((i+2)*17) % ObjectCount],  _slots[(3*i+2)%7] );

        connect(objects[((i+6)*23) % ObjectCount], _signals[(5*i+4)%7],

                objects[((i+8)*41) % ObjectCount],  _slots[(i+6)%7] );

    }

    DestroyThread *threads[ThreadCount];

    for (int i = 0; i < ThreadCount; ++i) {

        threads[i] = new DestroyThread;

        threads[i]->setObjects(objects + i*ObjectCountPerThread, ObjectCountPerThread);

    }

    for (int i = 0; i < ThreadCount; ++i)

        threads[i]->start();

    QVERIFY(threads[0]->wait(MAIN_THREAD_WAIT));

    // the other threads should finish pretty quickly now

    for (int i = 1; i < ThreadCount; ++i)

        QVERIFY(threads[i]->wait(EXTRA_THREAD_WAIT));

    for (int i = 0; i < ThreadCount; ++i)

        delete threads[i];

}

QTEST_MAIN(tst_QObjectRace)

#include "tst_qobjectrace.moc"