static void vnc_abort_display_jobs(VncDisplay *vd)
{
    VncState *vs;

    QTAILQ_FOREACH(vs, &vd->clients, next) {
        vnc_lock_output(vs);
        vs->abort = true;
        vnc_unlock_output(vs);
    }
    QTAILQ_FOREACH(vs, &vd->clients, next) {
        vnc_jobs_join(vs);
    }
    QTAILQ_FOREACH(vs, &vd->clients, next) {
        vnc_lock_output(vs);
        vs->abort = false;
        vnc_unlock_output(vs);
    }
}