title: Can EventFD be used with libEvent2?
body: <p>I have multiple processes doing IPC over shared memory. I use a cross process shared EventFD to trigger when a message is available. To listen to the trigger I was using Epoll and it works fine. But I need to switch to using libEvent2 for other reasons.  </p>
  
  <p>I need to wait in a libEvent base loop and receive an eventFD (read) whenever the other process writes to the eventFD.</p>
  
  <p>I tried adding the FD of the eventFD using bufferevent_socket_new() and event_new() but none of these work.  No callback is ever received. </p>
  
  <p>Is libEvent supposed to work with eventfd?  Are there any examples?</p>