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From: cflatter@ZIA.AOC.NRAO.EDU (Chris Flatters)
Newsgroups: comp.windows.x
Subject: Re:  IPC problem
Message-ID: <9011151700.AA28019@zia.aoc.nrao.edu>
Date: 15 Nov 90 17:00:45 GMT
Sender: daemon@athena.mit.edu (Mr Background)
Organization: The Internet
Lines: 17

> I have an application which needs to read data off a socket.  I can 
> arrange for it to be sent a ClientMessage when this data is to be
> transmitted, but since the amount of data could be fairly large (though
> I'm working to keep it of moderate size), I'd rather not have the
> application simply sit there (vis a vis X) while reading data.  I'd
> like to be able for it to respond to Expose events and the like while
> still receiving data.  Is there a reasonable way to do this?  I'm using
> just Xlib ons a SPARCStation running OpenWindows 2.0.  Thanks!

On Unix systems you can obtain the file descriptor of the X connection.
You can then use the select system call (BSD interface) or the poll
system call (System V interface) to see if either the X connection or
your connection have data pending.  You can then modify your main
event driven loop to read from your socket when there is no activity
on the X connection.

			Chris Flatters