WIP: use BlockingQueuedConnection

src/module/qt_window/mainwindow.cc

@@ -8,7 +8,7 @@ MainWindow::MainWindow(struct module_qt_window_s *qt_window, QWidget *parent)
     setCentralWidget(qt_window->mpv_widget);
     setFocusPolicy(Qt::StrongFocus);
 
-    connect(this, &MainWindow::emitCloseMpv, this, &MainWindow::__closeMpv, Qt::QueuedConnection);
+    connect(this, &MainWindow::emitCloseMpv, this, &MainWindow::__closeMpv, Qt::BlockingQueuedConnection);
 }
 
 void MainWindow::closeMpv(bool* exited) noexcept {

src/module/qt_window/mpvwidget_interface.cc

@@ -67,8 +67,6 @@ ___module_qt_window_close(struct module_qt_window_s *win)
 {
     bool exited = false;
     win->main_window->closeMpv(&exited);
-    while (!exited)
-        sleep(1);
     delete win->main_window;
     return true;
 }