#include <QDebug>
#include <QThread>
#include <QCoreApplication>
#include <QTimer>

struct GlobalStatic
{
    GlobalStatic() {
      // block forever
      forever {};
    }
};

Q_GLOBAL_STATIC(GlobalStatic, globalStatic)

class WorkerThread : public QThread
{
    Q_OBJECT
    void run() Q_DECL_OVERRIDE {
       forever {
          // qDebug() will block internally
          qDebug() << "Hi there";
       }
    }
};

class MainApp : public QObject
{
    Q_OBJECT
public slots:
    void lockStatic() {
        globalStatic();
    }
};

int main(int argc, char** argv)
{
    QCoreApplication app(argc, argv);

    WorkerThread wt;
    wt.start();

    MainApp m;
    QTimer::singleShot(0, &m, SLOT(lockStatic()));

    app.exec();
}

#include "main.moc"