UT is given, it is the maximum number of seconds to wait. If the count
cannot be decremented in that time, returns NIL without decrementing the
count.</p>
<p>If NOTIFICATION is given, it must be a SEMAPHORE-NOTIFICATION object whose
SEMAPHORE-NOTIFICATION-STATUS is NIL. If WAIT-ON-SEMAPHORE succeeds and
decrements the count, the status is set to T.</p>
</div></blockquote>
<div class="section" id="lambda-list">
<span id="lambda-list"></span><h2>Lambda list<a class="headerlink" href="#lambda-list" title="Perm