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From: daf@cavern.mitre.org (Dennis A. Franciskovich)
Newsgroups: comp.windows.x
Subject: XtAddInput question
Message-ID: <1991Jan18.200129.21797@linus.mitre.org>
Date: 18 Jan 91 20:01:29 GMT
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If anyone saved or understood the recent discussion about XtAddInput
with files, could you please contact me?  I didn't pay close attention
at the time, and now I've discovered that I'm having the same "problem".

Apparently there is a difference when waiting on input for a pipe and
when waiting on input from a file.  If I wait for input on a pipe
(similar to the xbc example in Young's book), my callback is executed
only when there is new input on the pipe.  If the input source is
instead a file, the callback is executed constantly.  I recall someone
mentioning that when the source is a file, the callback is executed
when the file *can* be read, not just when there is new input to read.

Replying by email would probably be appropriate, since this was recently
discussed.  My apologies for duplicating a question.  I had wanted to
ask about this at the Xt BOF the other day, but that discussion was a
bit monopolized.  ( 1/2 :-)

Dennis
daf@cavern.mitre.org