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From: Dave Abrahams <dave@boostpro.com>
To: emacs-devel@gnu.org
Subject: Re: Multithreading, again and again
Date: Thu, 20 Oct 2011 16:54:09 -0400	[thread overview]
Message-ID: <m21uu7gz9q.fsf@pluto.luannocracy.com> (raw)
In-Reply-To: jwv7h3zr0ec.fsf-monnier+emacs@gnu.org


on Thu Oct 20 2011, Stefan Monnier <monnier-AT-IRO.UMontreal.CA> wrote:

>> I think cooperativeness doesn't really eliminate the need for locks,
>
> I hope it will.

I think it can't.  If I write a (pure) function f today I should be able
to come back later and make its implementation multithreaded without
breaking all the other code that's running.  I don't see how I can do
that if instead of locking you plan to rely on people not-yielding.  If
there's no level at which parallelism can become an implementation
detail, I think you don't have a workable programming model.

-- 
Dave Abrahams
BoostPro Computing
http://www.boostpro.com




  reply	other threads:[~2011-10-20 20:54 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-09-28  6:49 Multithreading, again and again Dmitry Antipov
2011-09-28  7:50 ` joakim
2011-09-28  7:55   ` Julien Danjou
2011-09-28 13:37 ` Stefan Monnier
2011-10-17 21:57   ` Juri Linkov
2011-10-18  1:18     ` Stefan Monnier
2011-10-19 15:18       ` Tom Tromey
2011-10-19 20:51         ` Dave Abrahams
2011-10-19 22:01           ` Stefan Monnier
2011-10-19 22:05             ` Dave Abrahams
2011-10-20 23:00               ` John Wiegley
2011-10-20 23:52                 ` Dave Abrahams
2011-10-20 14:08             ` Richard Stallman
2011-10-20  1:12           ` SAKURAI Masashi
2011-10-20 17:09             ` Tom Tromey
2011-10-20 18:17               ` Stefan Monnier
2011-10-21  0:46                 ` SAKURAI Masashi
2011-10-21 14:18                   ` Nix
2011-10-21 14:48                     ` Eli Zaretskii
2011-10-22  3:40                       ` SAKURAI Masashi
2011-10-22 19:30                         ` Tom Tromey
2011-10-22 20:27                           ` Dave Abrahams
2011-10-18  8:24     ` Helmut Eller
2011-09-28 15:55 ` Helmut Eller
2011-10-19 15:14 ` Tom Tromey
2011-10-19 15:20 ` Tom Tromey
2011-10-19 18:30   ` Stefan Monnier
2011-10-19 19:00     ` Tom Tromey
2011-10-19 21:33       ` Stefan Monnier
2011-10-20 17:07         ` Tom Tromey
2011-10-20 18:33           ` Stefan Monnier
2011-10-20 20:54             ` Dave Abrahams [this message]
2011-10-20 20:57             ` Tom Tromey

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