9fans - fans of the OS Plan 9 from Bell Labs
 help / color / mirror / Atom feed
From: "Douglas A. Gwyn" <DAGwyn@null.net>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] no const?
Date: Thu, 14 Sep 2000 08:13:10 +0000	[thread overview]
Message-ID: <39BFF408.BF3B8EE@null.net> (raw)
In-Reply-To: <02c301c01db9$8141c3e0$89c584c3@cybercable.fr>

Boyd Roberts wrote:
> the real problem is how it was done in ANSI C.  i've got nothing
> against constants.  i've even been known to use the odd constant,
> but never a 'const' :-).

Since "const" doesn't mean "constant", again it's evident that
you're criticizing something that you do not understand.

> volatile?  yeah, i remember times when i coulda used it.  like in
> the 8th ed tu-16 tape driver that john mackin and i fixed.
> volatile would been nice, but we fixed it with a macro (no assembler).

I don't know the specific problem you encountered, but the PDP-11
PCC had a specific hack to disable optimization for certain kinds
of access that could be identified as potentially within the I/O
page.  I don't recall whether Ritchie's compiler performed the
optimization in the first place.

> i don't see that polluting the language in such a deplorable way
> is valid.

If you had better suggestions for how to address the same issues,
the C standards committee would have been glad to hear them.
It's easy to complain about what others do, but also pointless.



  reply	other threads:[~2000-09-14  8:13 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2000-09-13 14:00 David L Rubin
2000-09-13 14:17 ` Boyd Roberts
2000-09-13 16:42   ` Douglas A. Gwyn
2000-09-13 17:03     ` Boyd Roberts
2000-09-13 17:11       ` Steve Kilbane
2000-09-13 19:33         ` Boyd Roberts
2000-09-14  8:13           ` Douglas A. Gwyn [this message]
2000-09-14 12:34             ` Boyd Roberts
2000-09-15  8:47               ` Douglas A. Gwyn
2000-09-15 11:34                 ` Boyd Roberts
2000-09-15 13:07                   ` Theo Honohan
2000-09-15 14:55                     ` Boyd Roberts
2000-09-16  8:51                       ` Matt Lawless
2000-09-18 10:47                   ` Douglas A. Gwyn
2000-09-15 20:46                 ` Steve Kilbane
2000-09-14 19:41           ` Steve Kilbane
2000-09-18 10:47             ` Douglas A. Gwyn
2000-09-13 14:22 Russ Cox
2000-09-13 14:30 ` Boyd Roberts
2000-09-13 14:29 miller
2000-09-13 14:39 forsyth
2000-09-13 16:44 ` Douglas A. Gwyn
2000-09-13 18:06 Russ Cox
2000-09-14  8:13 ` Douglas A. Gwyn

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=39BFF408.BF3B8EE@null.net \
    --to=dagwyn@null.net \
    --cc=9fans@cse.psu.edu \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).