Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!elroy.jpl.nasa.gov!decwrl!deccrl!news.crl.dec.com!jg
From: jg@crl.dec.com (Jim Gettys)
Newsgroups: comp.windows.x
Subject: Re: How do *you* handle multiple displays?
Message-ID: <1991Jun28.132932.21795@crl.dec.com>
Date: 28 Jun 91 13:29:32 GMT
References: <14246@maslow.ptolemy-ri.arc.nasa.gov> <14258@ptolemy-ri.arc.nasa.gov> <1991Jun28.131900.28715@thunder.mcrcim.mcgill.edu>
Sender: news@crl.dec.com (USENET News System)
Organization: DEC Cambridge Research Lab
Lines: 14

In article <1991Jun28.131900.28715@thunder.mcrcim.mcgill.edu>, mouse@thunder.mcrcim.mcgill.edu (der Mouse) writes:

> More generally, XConnectionNumber (or the ConnectionNumber macro)
> returns "a connection number for the specified display", to quote the
> Xlib document.  It also says that "On a POSIX system, this is the file
> descriptor of the connection.", so the above is probably a reasonably
> safe thing to do, if you're willing to stick to UNIXish systems.
> 
> (What about connections that don't have file descriptors?  Does the
> above forbid such things?  I don't know, but wouldn't mind finding out.)

It doesn't forbid returning other useful information on other than Unix
environments; the specification is deliberately silent to allow for such use.
				- Jim