VGEN_WTHR_DATARCVD
if (!(ldcp->msg_thr_flags & VGEN_WTHR_DATARCVD)) {
ldcp->msg_thr_flags |= VGEN_WTHR_DATARCVD;
(VGEN_WTHR_DATARCVD | VGEN_WTHR_STOP))) {
ldcp->msg_thr_flags &= ~VGEN_WTHR_DATARCVD;