like the a-sync procedure) be
called in the same thread as that in which the &rsquo;waiter&rsquo; or default
event loop runs (as the case may be).
</p>
<p>This procedure acts as a form of channel through which two different
event loops may communicate.  It also offers a means by which a master
event loop (the waiter or default event loop) may allocate work to
worker event loops for execution.
</p>
<p>Depending on the circumstances, it may be desirable to provide
throttling arguments when constructing the &r