pan><strong>event-post!</strong> <em>action [loop]</em><a href='#index-event_002dpost_0021' class='copiable-anchor'> &para;</a></span></dt>
<dd><p>The &rsquo;loop&rsquo; (event loop) argument is optional.  This procedure will
post a callback for execution in the event loop passed in as an
argument, or if none is passed (or #f is passed), in the default event
loop.  The &rsquo;action&rsquo; callback is a thunk.  This is thread safe - any
thread may post an event (that is its main purpose), and the action
cal