From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00
	autolearn=unavailable autolearn_force=no version=3.4.4
Path: 
 buffer1.nntp.dca1.giganews.com!border1.nntp.dca1.giganews.com!nntp.giganews.com!usenet.blueworldhosting.com!feeder01.blueworldhosting.com!feeder.erje.net!1.eu.feeder.erje.net!eternal-september.org!feeder.eternal-september.org!mx02.eternal-september.org!.POSTED!not-for-mail
From: Paul Rubin <no.email@nospam.invalid>
Newsgroups: comp.lang.ada
Subject: Re: If not Ada, what else...
Date: Wed, 29 Jul 2015 23:47:41 -0700
Organization: A noiseless patient Spider
Message-ID: <87fv46m99u.fsf@jester.gateway.sonic.net>
References: <iomd56$c1s$1@dont-email.me> <mnqs6l$mdm$2@dont-email.me>
 <9e492c82-868d-43d3-a18a-38274400e337@googlegroups.com>
 <c5e815ac-8987-44cf-b66c-c25403887e39@googlegroups.com>
 <40184feb-4053-4ac3-8eaa-c3bd9cd8a77c@googlegroups.com>
 <10272577-945f-4682-85bc-8ad47f3653ae@googlegroups.com>
 <87si8i81k2.fsf@atmarama.net>
 <e3023a92-0087-490c-8d51-daccf89a309d@googlegroups.com>
 <d17drnF4b0qU1@mid.individual.net> <lymvypjqdq.fsf@pushface.org>
 <8076cbd0-2655-4c98-b70e-cb5f0c32e4ba@googlegroups.com>
 <e8521a43-2bbf-4970-a17b-b585d021f235@googlegroups.com>
 <mp6d4a$22n$1@loke.gir.dk>
 <5e6cb30b-5f8c-4fed-969e-3941315ecba0@googlegroups.com>
 <87si87nf8k.fsf@jester.gateway.sonic.net> <mpb0nh$9c3$1@dont-email.me>
 <877fpiom3q.fsf@jester.gateway.sonic.net> <mpb8r3$a2i$1@dont-email.me>
 <mpbabk$v80$1@loke.gir.dk> <87si86mehp.fsf@jester.gateway.sonic.net>
 <f7ccs551jwty.3mjqi70sex3x$.dlg@40tude.net>
Mime-Version: 1.0
Content-Type: text/plain
Injection-Info: mx02.eternal-september.org;
 posting-host="d4217d68945dedf510265c644f2a7daa";
 logging-data="1298"; mail-complaints-to="abuse@eternal-september.org";
 posting-account="U2FsdGVkX19Xw1PRTK60xNpFjh7WVuyP"
User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux)
Cancel-Lock: sha1:Tr6dxBOxoanaSBHyy6X+3vMkFIM=
 sha1:ueEwNZ9TmBuuIQ9ZhX3pBfRireo=
Xref: number.nntp.giganews.com comp.lang.ada:194479
Date: 2015-07-29T23:47:41-07:00
List-Id: <comp.lang.ada>

"Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> writes:
> Since queues marshal data there is no place for GC here. You put a *copy*

Oh I see, I didn't realize that.  In Python you'd only be passing references.

> Queueing references (I do it all the time implementing drivers and
> protocols) is a great pain and GC is no help, because of canceling
> requests and other sorts of stuff requiring deterministic time and
> order of execution such actions.  GC (at least a built-in one) has no
> place in systems programming.


GC makes it simple, at the cost of deterministic timing.  I can
understand why you might not want that in an Ada program.  I don't see
how it affects ordering.  GC works perfectly fine in systems programming
except for some low level operations or if you're doing something timing
sensitive.  Think of the Lisp machine.