Hi Mo,
I have a suggestion: put this at the top of thetcl.lang.Interp.eval() code:
if (!(Thread.currentThread().getName().equals("main"))) {
throw new TclException(
"tcl.lang.Interp.eval() cannot be called from any Java thread
other than main."
+ "Please see
http://www-cs-students.stanford.edu/~jwu/Using_Tcl_in_Java.html"
);
}
(or whatever web reference you think will be around and stable --
probably should be at scriptics.com)
That way, people will find out about the shortcoming directly, rather
than having to dig into their code and figure it out for themselves.
Thanks,
- Mike
> Date: Tue, 25 Jul 2000 12:23:55 -0700 (PDT)
> From: Mo DeJong <[EMAIL PROTECTED]>
> To: Mike Schwartz <[EMAIL PROTECTED]>
> cc: [EMAIL PROTECTED]
> Subject: Re: [Tcl Java] problem invoking tclBlend calls from within Java
threads
>
>
> On Tue, 25 Jul 2000, Mike Schwartz wrote:
>
>
> > Hi,
> >
> > I've come across another problem with tclBlend.
> ...
> > Synopsis: if you start up a Java program from Tcl and that Java program
> > creates multiple threads that try to invoke tcl.lang.Interp.eval() (with
> > appropriate synchronization so they are not interspersing commands with
> > each other), the threads hang waiting for the eval call to complete.
>
>
>
> We really need to embed a .wav file in tcljava.jar that plays
> "You can't do that dave" when someone tries to call Interp.eval()
> from another thread. If you try this, things wil get really hosed
> (as you found out).
>
>
> Here are some posts that cover how to do it correctly.
>
>
> http://www.mail-archive.com/tcljava@scriptics.com/msg00647.html
>
>
> http://www.mail-archive.com/tcljava@scriptics.com/msg00604.html
>
>
> http://www.mail-archive.com/tcljava@scriptics.com/msg00619.html
>
>
> Jiang also wrote up a nice overview of the situation, you
> can find his paper here:
>
>
> http://www-cs-students.stanford.edu/~jwu/Using_Tcl_in_Java.html
>
>
> Getting all of this shared knowledge back into the documentation
> is on the TODO list. We also need some nice small examples that
> people can look at without having to read all the API docs.
>
>
> Mo DeJong
> Red Hat Inc
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