IT_WAIT
(ithd->it_flags & (IT_DEAD | IT_WAIT)) == 0) {
} else if ((ithd->it_flags & IT_WAIT) != 0) {
ithd->it_flags &= ~IT_WAIT;
ithd->it_flags |= IT_WAIT;
while (ithd->it_flags & IT_WAIT) {