From: Eli Zaretskii <eliz@gnu.org>
To: Juliusz Chroboczek <jch@irif.fr>
Cc: emacs-devel@gnu.org
Subject: Re: semantics of thread-signal
Date: Mon, 12 Dec 2016 05:33:22 +0200 [thread overview]
Message-ID: <83pokxddod.fsf@gnu.org> (raw)
In-Reply-To: <871sxe2b8d.fsf@irif.fr> (message from Juliusz Chroboczek on Mon, 12 Dec 2016 02:21:38 +0100)
> From: Juliusz Chroboczek <jch@irif.fr>
> Date: Mon, 12 Dec 2016 02:21:38 +0100
>
> However, the Emacs thread support has been designed in a way to
> later allow more fine-grained concurrency, and correct programs
> should not rely on cooperative threading.
>
> So if thread-signal can be delivered asynchronously, this will cause
> trouble when Emacs moves to kernel threads.
>
> (And this does happen. Viz. SBCL, CCL, ACL, all of which switched from
> userspace threading to kernel threads sometime in the last 20 years or
> so.)
The current implementation already uses kernel threads, it just makes
sure only one of them runs Lisp at any given time. All the rest are
stuck either in system calls or trying to acquire a global lock.
prev parent reply other threads:[~2016-12-12 3:33 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-12 0:16 semantics of thread-signal (WAS: Crashing the new thread code) Noam Postavsky
2016-12-12 1:21 ` semantics of thread-signal Juliusz Chroboczek
2016-12-12 2:06 ` Noam Postavsky
2016-12-12 16:08 ` Eli Zaretskii
2016-12-13 2:46 ` Noam Postavsky
2016-12-12 3:33 ` Eli Zaretskii [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=83pokxddod.fsf@gnu.org \
--to=eliz@gnu.org \
--cc=emacs-devel@gnu.org \
--cc=jch@irif.fr \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this external index
https://git.savannah.gnu.org/cgit/emacs.git
https://git.savannah.gnu.org/cgit/emacs/org-mode.git
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.