Signal/slots in different threads and const reference?

mistralegna

Hello all,

Is it okay to have a slot that will be called from a different thread and that takes as its first argument a const QByteArray&?
For instance, let say I have a Receiver class (inheriting from QObject):

class Receiver : public QObject
{
    Q_OBJECT:

public:
    Receiver(QObject* parent = nullptr);

public slots:
    void dataReceived(const QByteArray& data);

private:
    QThread m_thread;
}

and the constructor is defined as:

Receiver::Receiver(QObject* parent) : QObject(parent)
{
    moveToThread(&m_thread);
}

When the onDataReceived slot will be called from an object living in another thread than the m_thread above, is it guaranteed that the QBytearray will live long enough?

Thank you!

J.Hilk

@mistralegna Qt::QueuedConnections do implicit copying, so even when its marked const ref, the byte array will be copied and therefore live long enough