Re: multi-threaded Emacs

[Chetan Pandya <pandyacus@sbcglobal.net>]

I am wondering if there is eally an expectation build a multi-threading emacs. There are also all of the global variables in C code that might need to be saved and restored e.g. while loading a file.

Chetan

--- On Sun, 12/7/08, Giuseppe Scrivano <gscrivano@gnu.org> wrote:

> From: Giuseppe Scrivano <gscrivano@gnu.org>
> Subject: Re: multi-threaded Emacs
> To: "Stefan Monnier" <monnier@iro.umontreal.ca>
> Cc: rms@gnu.org, emacs-devel@gnu.org
> Date: Sunday, December 7, 2008, 11:51 PM
> Stefan Monnier <monnier@iro.umontreal.ca> writes:
> 
> >
> > Switching the value of specpdl is not enough.  Try
> >
> > (progn
> >   (run-in-thread a-thread '(dotimes (i 2)
> >                          (print "hello")
> >                          (yield)))
> >
> >     (let ((i 5))
> >       (while (< i 7)
> >         (print "world")
> >         (yield)
> >         (setq i (1+ i))))
> >
> > What Richard suggests is that upon a thread-switch we
> walk up the specpdl
> > stack, undoing all the bindings, then switch specpdl
> to the one of the
> > other thread and walk down that one to reestablish the
> local bindings of
> > the new thread.
> 
> It is exactly what I do in save_thread_bindings () and
> restore_thread_bindings ().
> 
> Trying your code (plus initializing the thread and another
> ')' at the
> end) I have:
> 
> (progn
>  (run-in-thread a-thread '(dotimes (i 2)
>                         (print "hello")
>                         (yield)))
> 
>    (let ((i 5))
>      (while (< i 7)
>        (print "world")
>        (yield)
>        (setq i (1+ i)))))
> 
> "hello"
> 
> "world"
> 
> "hello"
> 
> "world"
> 
> 
> Regards,
> Giuseppe