通过排队的Qt信号槽连接发送QSharedPointers的QVector

Question

I've encountered problem when I've tried to send QVector > between threads through queued signal-slot connection (Tester is my class that inherits QObject)

When I try to simply connect signal\\slot with such QVector as argument programm tells during run that this metatype should be registered (though QVector, QSharedPointer and class inherited from QObject should be registered automatically.

I've tried adding

typedef QVector<QSharedPointer<Tester> > TestPointerVector;
Q_DECLARE_METATYPE(TestPointerVector);

after declaration of Tester class and add to main()

qRegisterMetaType<TestPointerVector>();

In that case I have compiling errors in qmetatype.h и qtypeinfo.h telling me that QVector > is incomplete type and that sizeof of such vector can't be calculated.

What is right way to do this register metatype thing?

My testing main() looks as follow:

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    qRegisterMetaType<TestPointerVector>();
    Receiver* rcv = new Receiver(0);
    Emitter* emt = new Emitter(0);
    QThread* thread = new QThread();
    QObject::connect(rcv, SIGNAL(finished()), thread, SLOT(quit()));
    QObject::connect(rcv, SIGNAL(finished()), rcv, SLOT(deleteLater()));
    QObject::connect(emt, SIGNAL(send(TestPointerVector)), rcv, 
    SLOT(receive(TestPointerVector)), Qt::QueuedConnection);
    rcv->moveToThread(thread);
    thread->start();
    emt->process();

    while(!thread->isFinished())
        continue;
    return a.exec();
}

Answer 1

Found problem, it wasn't in qRegisterMetaType part. Problem was that I was using Qvector<...> in signal\\slot signatures, I've changed it to const QVector<...>& and everything started working.

And if QSharedPointer is deleted in emitter thread it'd still be received by receiver and data won't be corrupted (what I was trying to test by this example).