From: Richard Jones <rich@annexia.org>
To: skaller <skaller@users.sourceforge.net>
Cc: Jon Harrop <jon@ffconsultancy.com>, caml-list@yquem.inria.fr
Subject: Re: [Caml-list] CallCC using fork (and garbage collected processes)
Date: Mon, 16 Jul 2007 17:46:43 +0100 [thread overview]
Message-ID: <20070716164643.GB26691@furbychan.cocan.org> (raw)
In-Reply-To: <1184566043.8152.55.camel@rosella.wigram>
On Mon, Jul 16, 2007 at 04:07:23PM +1000, skaller wrote:
> A much reduced version of this idea has been tried
> in C, swapping the C stack pointer and registers using
> setjmp/longjmp and some assembler.
It's even easier to use makecontext(3) et al, if you have them. I
wrote a C implementation which tries a variety of strategies
(makecontext, setjmp, assembly), here:
http://annexia.org/freeware/pthrlib
> This is, of course, much faster than forking.
>
> However the C method doesn't work, because Unix uses
> linear bounded stacks, and there isn't enough address
> space to create enough stacks.
This is more of a problem with 32 bit machines. 64 bit machines
shouldn't have an issue. Even on a 32 bit machine I could get
thousands of threads before hitting a limit.
Rich.
--
Richard Jones
Red Hat
next prev parent reply other threads:[~2007-07-16 16:46 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-16 5:30 Jon Harrop
2007-07-16 6:07 ` [Caml-list] " skaller
2007-07-16 16:46 ` Richard Jones [this message]
2007-07-16 17:25 ` skaller
2007-07-16 17:57 ` Tom
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