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From: schoeller@kobal.enet.dec.com (Dick Schoeller)
Newsgroups: comp.windows.x
Subject: Re: Toolkit re-entrant?
Message-ID: <1388@shodha.dec.com>
Date: 28 Jun 90 18:27:14 GMT
References: <4112@jato.Jpl.Nasa.Gov>
Sender: news@shodha.dec.com
Reply-To: schoeller@kobal.enet.dec.com (Dick Schoeller)
Organization: Digital Equipment Corporation, Nausea, Cow Hampshire
Lines: 17

DECwindows is based on X11R3.  In X11R3 the toolkit has some major flaws
that prevent it from being used from multiple threads.  Under R4 most of
these problems are (supposedly) fixed.  I talked with Paul Asente about
this at the X Technical Conference.  His opinion was that it should work
but that it hadn't been tested for that purpose.  DECwindows will not
be based on R4 until sometime in the future.

Xlib under DECwindows is AST reentrant (it blocks ASTs during critical
sections) it is not thread reentrant.  So this adds additional difficulty.

This isn't much help, I know.  But it does let you know where you stand.

Dick Schoeller                  | schoeller@kobal.enet.dec.com
Digital Equipment Corporation   | 603-881-2965
110 Spit Brook Rd., ZKO2-3/R56  | "Either Judaism has something to say to the
Nashua, NH 03062-2642           | world or it has nothing to say to Jews."
                                |                             - Dennis Prager