[clean-list] "Concurrent" Clean

[Maks Verver]

Hi Brent,

On Monday 10 November 2003 19:19, Brent Fulgham wrote:
> Where would I find information on the "Concurrent" aspects of Clean?  Are
> there threading primitives, or some notion of coroutines that are
> documented somewhere?  A cursory look at the manual doesn't register
> anything, but it's still early Monday morning here, so I may just need a
> refill of my tea.

To my understanding, you have had the right amount of tea, and no form of 
concurrency control is present in the current version of "Concurrent" Clean. 
This issue has come up earlier on the mailing list and I took the liberty of 
digging it up from the archives:

>From F.S.A.Zuurbier@inter.nl.net Tue, 7 May 2002 06:55:57 UT:
> Jafar wrote:
> > I am looking for a concurrent programming language to
> > implement some mobile agent simulation. I skimmed
> > through the pdf documents that come with the Clean
> > download, as well as the language report, but I could
> > not find anything that said directly: "Clean can be
> > used to make concurrent processes." I believe that it
> > can be done, but I would like confirmation before I go
> > about studying the language. If it can be done, what
> > is the maximum number of concurrent processes that can
> > be programmed?
> 'Concurrent' has been in the name for years now. There have been attempts in 
> the past to really implement this, but current versions of the language -
> outside the laboratory - don't support parallelism or even interleaved
> processing. The attempts aimed at concurrency that was indicated to the
> compiler by annotations. The annotation {P} would indicate that the
> following expression was to be evaluated on a different processor.
> {I} meant that the expression was to be evaluated in an interleaved way
> on the same processor. Although this has advantages also on a
> semantic level, I believe itis very low (if at all) on Nijmegen's
> priority list.
>
> Regards Erik Zuurbier
>

Kind regards,
Maks Verver.