Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!wuarchive!udel!burdvax!dowding
From: dowding@PRC.Unisys.COM (John Dowding)
Newsgroups: comp.windows.x
Subject: Handling other input sources
Keywords: XtAddInput
Message-ID: <11903@burdvax.PRC.Unisys.COM>
Date: 2 Nov 89 00:07:38 GMT
Sender: news@PRC.Unisys.COM
Lines: 14


I am working on a program using multiple processes and pipes.  Using
Young's book (X Window Systems Programming and Applications with Xt),
I built a prototype using XtAddInput (based on his example in section 
5.8, pgs. 141-151).  By putting a print statement at the top of the
input callback, I found that it is being called continually, not just
when new input appears on the pipe.  Since this amounts to constantly
polling the pipe for data, this is very inefficient.  

Does anyone know why this is happening or how to fix it?

Thanks,
John Dowding
dowding@prc.unisys.com