Issue with Qt thread affinity and moveToThread

Question

I\'m trying to use threads in Qt to delegate some work to a thread, but I can\'t get it to work. I have a class inheriting QMainWindow that have a member object that launch

Answer 1

You can also move it to your thread by doing it from the object's owner thread.

#include 
#include 
#include 
#include 
#include 
#include 


template 
inline void runOnThread(QThread *qThread, Func &&func)
{
    QTimer *t = new QTimer();
    t->moveToThread(qThread);
    t->setSingleShot(true);
    QObject::connect(t, &QTimer::timeout, [=]()
    {
        func();
        t->deleteLater();
    });
    QMetaObject::invokeMethod(t, "start", Qt::QueuedConnection, Q_ARG(int, 0));
}



void moveToThread(QObject *ptr, QThread *targetThrd=QThread::currentThread())
{
    std::mutex mt;
    std::condition_variable_any cv;
    runOnThread(ptr->thread(),[&]
    {
        ptr->setParent(NULL);
        ptr->moveToThread(targetThrd);
        cv.notify_one();
    });
    cv.wait(mt);
}

You just need to call

moveToThread( m_poller, m_pollThread);