From: erik quanstrom <quanstro@quanstro.net>
To: 9fans@9fans.net
Subject: [9fans] waitfree
Date: Mon, 19 May 2014 13:34:33 -0400 [thread overview]
Message-ID: <ac0a74a8fd1972cd1c72c7b5983fdc4e@ladd.quanstro.net> (raw)
i've been thinking about ainc() and for the amd64 implementation,
TEXT ainc(SB), 1, $-4 /* int ainc(int*) */
MOVL $1, AX
LOCK; XADDL AX, (RARG)
ADDL $1, AX
RET
does anyone know if the architecture says this is wait-free?
this boils down to exactly how LOCK works, and i can't find
a good-enough definition. i tend to think that it might not be.
- erik
next reply other threads:[~2014-05-19 17:34 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-19 17:34 erik quanstrom [this message]
2014-05-19 19:49 ` Devon H. O'Dell
2014-05-19 20:21 ` erik quanstrom
2014-05-19 21:01 ` Devon H. O'Dell
2014-05-19 22:05 ` erik quanstrom
2014-05-19 22:14 ` ron minnich
2014-05-19 22:18 ` erik quanstrom
2014-05-20 1:10 ` Devon H. O'Dell
2014-05-20 2:12 ` erik quanstrom
2014-05-20 14:47 ` Devon H. O'Dell
2014-05-20 15:41 ` erik quanstrom
2014-05-20 19:14 ` Devon H. O'Dell
2014-05-20 19:30 ` erik quanstrom
2014-05-20 20:32 ` Devon H. O'Dell
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=ac0a74a8fd1972cd1c72c7b5983fdc4e@ladd.quanstro.net \
--to=quanstro@quanstro.net \
--cc=9fans@9fans.net \
/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.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).