Re: threads & OCamlTK

From: Jun P. Furuse (
Date: Tue Mar 16 1999 - 18:42:20 MET

Message-Id: <>
Subject: Re: threads & OCamlTK
From: "Jun P. Furuse" <>
Date: Tue, 16 Mar 1999 18:42:20 +0100

Francois Rouaix wrote:

> > And, on a vaguely related topic, is it possible to use threads
> > with programs
> > that also use OCamlTK? I know Tk is not threadsafe, but if only
> > one thread is calling Tk functions, then perhaps it's still OK?
> Yes, it should be ok. But this also includes the Tk event loop, and thus
> all callbacks. Also, there is the issue of using Thread primitives within
> a callback (e.g. having the callback on a button triggering a condition).
> In bytecode threads, this will probably not work.
> Jun and I discussed these issues a long time ago, and Jun implemented
> a modified version of the CamlTK core where the event loop would be handled
> in Caml instead of C, so as to be compatible with threads, to some extent
> (all other Tk calls still need to be in a critical section).
> I don't think we ever distributed this version, and I'm not even sure it
> would work on Windows, but you might want to check with Jun.

I implemented this threaded version of OCamlTk, called ThreadTk about
one year ago. You can see the code at the caml cvs:

Please README.threadtk for more information.

But this is based on an old release of OCamlTk and not maintained at
all for long. I may update it if I have some spare time...

Jun P. Furuse
    Institut National de Recherche en Informatique et en Automatique

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