Libwandevent is a software library written in C that provides an API for
developing event-driven programs.
Libwandevent is intended for the development of programs that may have a number
of 'events' that can occur at any given point in the program's execution which
need to be handled as soon as possible without blocking or waiting on other
inactive events.

libwandevent is developed by the WAND Network Research Group at Waikato
University in New Zealand.