polling sockets using glib

[Peter Robinson <pjr itee uq edu au>]

Hi,
I am writing a server application (using glib) in which I want to be 
able to (frequently) turn polling on and off for given sockets.

I am currently using g_io_add_watch to add a watch on a socket and 
g_source_remove to remove the watch. This seems like an expensive way of 
doing what I want. What is the recommended way of doing this?

Peter Robinson