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From: swick@ATHENA.MIT.EDU (Ralph R. Swick)
Newsgroups: comp.windows.x
Subject: Re: Getting rid of windows
Message-ID: <8703161429.AA07376@ORPHEUS>
Date: Mon, 16-Mar-87 09:29:37 EST
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Posted: Mon Mar 16 09:29:37 1987
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Mistakes of this nature are common to programmers unfamiliar with server-client
designs, thus I am sending my reply to the entire list.

If your XUnmapWindow() is followed immediately by the sleep() (or variant),
then the request is never actually getting out to the server.  You need to use
XSync() to make sure all requests and replies are processed before sleeping.

It will be possible in the next Xlib to disable the buffering of requests so
as to ease debugging of applications.  This effect will probably still catch
the unwary, however.

-Ralph