Re: Gwydion Dylan Threads

To: Raffael Cavallaro <raffael@mediaone.net>
Subject: Re: Gwydion Dylan Threads
From: Gabor Greif <gabor68@yahoo.com>
Date: Wed, 16 May 2001 06:55:34 -0700 (PDT)
Cc: info-dylan@ai.mit.edu
In-Reply-To: <B727E901.6ADF%raffael@mediaone.net>
Sender: owner-info-dylan@ai.mit.edu

Andreas has tried to run multiple threads once, but it
crashed after seconds. As I understand, the general
representation of dylan objects in Gwydion conflicts
with multithreading. It is composed of two words and
setting such a descriptor is non-atomic. This usually
leads to ugly race conditions when calling slot
setters and modifying globals.

Also I doubt that the dylan library is thread safe.

The solution would be to switch to a pointer-based
general representation (possibly using NULL as a #f).
Until then you could try writing purely functional
code in Dylan :-)

Sorry for not being able to report better news.

	Gabor

--- Raffael Cavallaro <raffael@mediaone.net> wrote:
> Dear Dylan compiler wizards:
> 
> what is the current status of thread support under
> Gwydion Dylan? I'm
> interested in Mac OS X in particular, if that makes
> any difference. I
> remember reading on the web site that threads were
> not supported yet, but
> I've just looked, and there was no mention of that
> under Current Limitations
> (unless I missed it).
> 
> TIA,
> 
> Raf
> 
> 
> 

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References:

Gwydion Dylan Threads

From: Raffael Cavallaro <raffael@mediaone.net>