These are great points! Thank you.

Robby

On Thu, Feb 22, 2018 at 1:59 AM 'Paulo Matos' via Racket Users <
racket-users@googlegroups.com> wrote:

>
>
> On 22/02/18 01:02, Robby Findler wrote:
> > You can create a thread and wait simultaneously on the place channel
> > value and also on some channel that the various workers use to check
> > in and see if a value is available. Here's a very simple instantiation
> > of this idea.
> >
>
> Thanks. That looks like it could work with my current architecture.
>
> > More generally, I think that one of the underappreciated parts of
> > Racket's built in features are `evt`s.  Do check out what they can do.
> > You can do much more sophisticated protocols that are tailored to
> > exactly what you need.
> >
>
> Just finished reading the reference manual on evt's. A feature I had not
> used before. Looks great.
>
> While doing so I noticed two things:
> 1. There's no guide chapter on evts with guide-like explanations and
> examples; although the ref is not bad either;
> 2. It doesn't say place channels were evts. Actually when I looked at
> your example I thought you missed the fact I was talking about place
> channels and not normal channels. Also because the reference mentions:
>
> "Racket values that act as synchronizable events include semaphores,
> channels, asynchronous channels, ports, TCP listeners, log receivers,
> threads, subprocesses, will executors, and custodian boxes. Libraries
> can define new synchronizable events, especially though prop:evt."
>
> There's no mention of place channels. I was happy to find out that your
> example would work with place channels as well because:
>
> > (define-values (p1 p2) (place-channel))
> > (evt? p1)
> #t
>
> Thanks,
>
> --
> Paulo Matos
>
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