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From: =?utf-8?Q?Ludovic_Court=C3=A8s?= <ludo@gnu.org>
To: Christopher Baines <mail@cbaines.net>
Cc: guix-devel@gnu.org
Subject: Re: Implementing the guix-dameon in Guile
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Christopher Baines <mail@cbaines.net> skribis:

> I'm not very familiar with actors, but I guess that's similar to having
> a bunch of cooperating fibers which handle different things.

Yes.  Specifically, actors here are a fiber together with a channel;
each actor looks like:

  (let loop ((state =E2=80=A6))
    (match (get-message channel)
      ;; handle request and call =E2=80=98loop=E2=80=99
      ))

The actor keeps serving requests it gets on its channel.

It makes quite a difference when you start framing it this way.  When I
first fiberized Cuirass years ago, I=E2=80=99d just use =E2=80=98spawn-fibe=
r=E2=80=99 here and
there where concurrency was needed.  Thinking in terms of actors makes
the code clearer, allows you to think about =E2=80=9Cconcurrency units=E2=
=80=9D, respect
separation of concerns, and so on.  (Our Spritely comrades would explain
this much better!)

Ludo=E2=80=99.