From: Noam Postavsky <npostavs@gmail.com>
To: Stephen Leake <stephen_leake@stephe-leake.org>
Cc: emacs-devel <emacs-devel@gnu.org>
Subject: Re: elisp test-and-set?
Date: Fri, 25 May 2018 20:38:35 -0400 [thread overview]
Message-ID: <CAM-tV-9MkQCTwHJgASMqifz7pF1b2KOpT8WgnE6YC+v-xt-_-g@mail.gmail.com> (raw)
In-Reply-To: <86po1jv4bv.fsf@stephe-leake.org>
On 25 May 2018 at 17:00, Stephen Leake <stephen_leake@stephe-leake.org> wrote:
> Since faces are computed by font-lock, which runs on a timer in the
> background, it can try to run when indent is running in the foreground.
Only if the foreground indent function calls `accept-process-output',
`sit-for', or something like that.
> In other contexts I'd use a "test and set" instruction for this; read
> the flag and set it true in one uninterruptible action. I don't see
> anything like that in elisp, and searching in the elisp manual for
> "mutual" and "exclusion" is no help.
There is `(elisp) Mutexes' (as of Emacs 26), but even with threads
enabled, only a single Lisp thread runs at one time, so there's not
really a need for it at the moment.
next prev parent reply other threads:[~2018-05-26 0:38 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-25 21:00 elisp test-and-set? Stephen Leake
2018-05-26 0:38 ` Noam Postavsky [this message]
2018-05-26 7:08 ` Eli Zaretskii
2018-05-26 7:53 ` Stephen Leake
2018-05-26 21:14 ` Stefan Monnier
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