iHubert Feyrer <hubert.feyrer@informatik.fh-regensburg.de> asked
>How compatible is this new NetBSD feature with other operating systems?
>Do they provide similar interfaces? Is there a standard on this?
Niels Provos has libevent (http://monkey.org/~provos/libevent/)

The libevent API provides a mechanism to execute a callback function
when a specific event occurs on a file descriptor or after a timeout
has been reached.

libevent is meant to replace the asynchronous event loop found in event
driven network servers. An application just needs to call event_dispatch()
and can then add or remove events dynamically without having to change
the event loop.

Currently, libevent supports kqueue(2) and select(2). Support for poll(2)
and /dev/poll is planned. The internal event mechanism is completely
independent of the exposed event API, and a simple update of libevent
can provide this new functionality without having to redesign the server
applications.



-- 
   d.thomas@its.uq.edu.au    Danny Thomas,                                    
          +61-7-3365-8221    Infrastructure Management,
 http://www.its.uq.edu.au    ITS, The University of Queensland