QRunnable POC

foo.cpp

#include "foo.h"

#include <QThread>
#include <QDebug>

Foo::Foo(int d, QObject *parent) :
    QObject(parent), data(d)
{
}

void Foo::run()
{
    qDebug() << "run() in: " << QThread::currentThread();
    connect(this, SIGNAL(startWorking()), this, SLOT(doWork()));
    emit startWorking();
    eventLoop.exec();
}

void Foo::doWork()
{
    qDebug() << "doWork() in: " << QThread::currentThread();
}

foo.h

#ifndef FOO_H
#define FOO_H

#include <QObject>
#include <QRunnable>
#include <QEventLoop>

class Foo : public QObject, public QRunnable
{
    Q_OBJECT
public:
    explicit Foo(int data, QObject *parent = 0);
    void run();
signals:
    void startWorking();
public slots:
    void doWork();

private:
    QEventLoop eventLoop;
    int data;
};

#endif // FOO_H

main.cpp

#include <QCoreApplication>
#include <QThreadPool>

#include "foo.h"

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    Foo *foo = new Foo(42);

    QThreadPool::globalInstance()->start(foo);
    
    return a.exec();
}

poc.pro

QT       += core

QT       -= gui

TARGET = qrunnable_poc
CONFIG   += console
CONFIG   -= app_bundle

TEMPLATE = app


SOURCES += main.cpp \
    foo.cpp

HEADERS += \
    foo.h