o; and will return when the generator has
finished or, if &rsquo;handler&rsquo; is provided, upon the generator raising an
exception.  This procedure must (like the a-sync procedure) be called
in the same thread as that in which the &rsquo;loop&rsquo; or default event loop
runs (as the case may be).
</p>
<p>This procedure calls event-post! in the &rsquo;loop&rsquo; or default event loop,
which could be subject to throttling (see the documentation for the
make-event-loop procedure for further information).
<