sleepq_timedwait
error = -sleepq_timedwait(c, 0);
ret = -sleepq_timedwait(wchan, 0);
rval = sleepq_timedwait(cvp, 0);
error = sleepq_timedwait(&lk->lock_object, pri);
rval = sleepq_timedwait(ident, pri);
rval = sleepq_timedwait(ident, 0);
int sleepq_timedwait(const void *wchan, int pri);