Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.python > #100735

Re: (Execution) Termination bit, Alternation bit.

Path csiph.com!fu-berlin.de!uni-berlin.de!not-for-mail
From Chris Angelico <rosuav@gmail.com>
Newsgroups comp.lang.python
Subject Re: (Execution) Termination bit, Alternation bit.
Date Wed, 23 Dec 2015 02:56:51 +1100
Lines 27
Message-ID <mailman.62.1450799815.2237.python-list@python.org> (permalink)
References <df0ec$56759a3e$d47876e2$54535@news.ziggo.nl> <9Bldy.3723$Bz5.1578@fx04.iad> <864af$56760c5f$d47876e2$48630@news.ziggo.nl> <QHody.3724$Bz5.3354@fx04.iad> <d8c28$56769027$d47876e2$58902@news.ziggo.nl> <n579ju$boh$2@speranza.aioe.org> <f0986$5677f334$d47876e2$26800@news.ziggo.nl> <QXSdy.6634$QG6.5135@fx31.iad> <a0e83$56797053$d47876e2$15662@news.ziggo.nl>
Mime-Version 1.0
Content-Type text/plain; charset=UTF-8
X-Trace news.uni-berlin.de C6ziegEz+pcs42YTUP9V1AX3f+0uNe6WbJMvKuKv/bbA==
Return-Path <rosuav@gmail.com>
X-Original-To python-list@python.org
Delivered-To python-list@mail.python.org
X-Spam-Status OK 0.006
X-Spam-Evidence '*H*': 0.99; '*S*': 0.00; 'received:209.85.223': 0.03; 'pop': 0.05; 'executed': 0.07; 'cc:addr:python-list': 0.09; 'instruction.': 0.09; 'bug': 0.10; 'exception': 0.13; 'stack': 0.13; 'wed,': 0.15; '23,': 0.16; 'from:addr:rosuav': 0.16; 'from:name:chris angelico': 0.16; 'massively': 0.16; 'received:io': 0.16; 'received:psf.io': 0.16; 'subject:bit': 0.16; 'wrote:': 0.16; "wouldn't": 0.16; '2015': 0.20; 'cc:2**0': 0.20; 'cc:addr:python.org': 0.20; 'fix': 0.21; 'programming': 0.22; 'am,': 0.23; 'bit': 0.23; 'dec': 0.23; '(most': 0.24; 'header:In- Reply-To:1': 0.24; 'skip:" 20': 0.26; 'least': 0.27; 'message- id:@mail.gmail.com': 0.27; 'idea': 0.28; 'flying': 0.29; 'termination': 0.29; "i'm": 0.30; 'work.': 0.30; 'code': 0.30; 'subject:) ': 0.32; 'problem': 0.33; 'languages': 0.34; 'previous': 0.34; 'received:google.com': 0.35; 'could': 0.35; 'done': 0.35; 'fail': 0.35; 'level': 0.35; 'received:209.85': 0.36; 'received:209': 0.38; 'skip:p 20': 0.38; 'means': 0.39; 'sure': 0.39; 'some': 0.40; 'protection': 0.60; 'save': 0.60; 'high': 0.60; 'back': 0.62; 'here.': 0.62; 'research': 0.62; 'here': 0.66; 'offer': 0.66; 'talking': 0.67; 'yourself': 0.73; 'chrisa': 0.84; 'rediscovered': 0.84; 'to:none': 0.91; 'trouble.': 0.91
DKIM-Signature v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:cc :content-type; bh=4GB2cSUDE3MPYzsmeRiJEG13M6sb4aDncLj6/LnmcZA=; b=u7NDQe39IHnjWFf65qrhqx5jZS+uKRXtJNJMe6nTaTW7fBHDxvV6pPnry+z+DfxkFQ vjUo7lnuLIBv5fXRp0xZ2e1QCnGVf/78kDBeVTISNubCJ16CTomNSsQKZd8YCTOT/08w g+Ry4/ouhmd7pmcX37GgFT9BlNWyyRKYKGzgRMr0EpNx62iHMMLJnFeH6ghm2LDzQtNc iC6kdhMlDPjKolKPQavBrgkLNqwX4WVUuDwMCeHtdso3e/o1RX9UQfKlw5Dtcl6acbBJ ZDssuqkve99QH1Gma3g/YacHJRPf0uAt3VSemhsTzdkUI+U0eydzAP5/AjpIQ9grGSC8 jzjw==
X-Received by 10.107.40.76 with SMTP id o73mr21161765ioo.157.1450799811920; Tue, 22 Dec 2015 07:56:51 -0800 (PST)
In-Reply-To <a0e83$56797053$d47876e2$15662@news.ziggo.nl>
X-BeenThere python-list@python.org
X-Mailman-Version 2.1.20+
Precedence list
List-Id General discussion list for the Python programming language <python-list.python.org>
List-Unsubscribe <https://mail.python.org/mailman/options/python-list>, <mailto:python-list-request@python.org?subject=unsubscribe>
List-Archive <http://mail.python.org/pipermail/python-list/>
List-Post <mailto:python-list@python.org>
List-Help <mailto:python-list-request@python.org?subject=help>
List-Subscribe <https://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
Xref csiph.com comp.lang.python:100735

Show key headers only | View raw

On Wed, Dec 23, 2015 at 2:46 AM, Skybuck Flying <skybuck2000@hotmail.com> wrote:
> One idea which immediatly comes to mind to fix this problem is to offer a
> "PushTerminationFlag" onto stack and then a "ClearTerminationFlag"
> instruction.
>
> Then a code section can be executed without breaking or terminating.
>
> Once that's done the code would then call "PopTerminationFlag".
>
> At least this offers some protection against arbitrarely breaking code
> sections.

Congratulations! You've just rediscovered 'critical sections'. So...
what happens if there's a programming bug that means you fail to pop
the termination flag? Wouldn't it be so nice if you could use...
exception handling?

Here on python-list/comp.lang.python, we have all those high level
facilities. We don't need new CPU-level features to make this work.
Are you massively cross-posting? Either way, this is pretty off-topic
for here. Read up a bit on what's already been done (most of what
you're talking about was already solved back in the 1990s when I was
programming on OS/2, and I'm pretty sure the solutions were all lifted
directly from mainframe research in previous decades), or just use
high level languages and save yourself a boatload of trouble.

ChrisA

Back to comp.lang.python | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

(Execution) Termination bit, Alternation bit. "Skybuck Flying" <skybuck2000@hotmail.com> - 2015-12-19 18:56 +0100
  Re: (Execution) Termination bit, Alternation bit. Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2015-12-19 21:27 -0500
  Re: (Execution) Termination bit, Alternation bit. Chris Angelico <rosuav@gmail.com> - 2015-12-20 14:44 +1100
  Re: (Execution) Termination bit, Alternation bit. "Skybuck Flying" <skybuck2000@hotmail.com> - 2015-12-20 12:25 +0100
    Re: (Execution) Termination bit, Alternation bit. Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2015-12-20 11:21 -0500
    Re: (Execution) Termination bit, Alternation bit. eryk sun <eryksun@gmail.com> - 2015-12-20 22:04 -0600
    Re: (Execution) Termination bit, Alternation bit. "Skybuck Flying" <skybuck2000@hotmail.com> - 2015-12-21 13:40 +0100
      Re: (Execution) Termination bit, Alternation bit. Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2015-12-21 12:57 -0500
        Re: (Execution) Termination bit, Alternation bit. Grant Edwards <invalid@invalid.invalid> - 2015-12-21 19:32 +0000
          Re: (Execution) Termination bit, Alternation bit. "Skybuck Flying" <skybuck2000@hotmail.com> - 2015-12-29 12:25 +0100
            Re: (Execution) Termination bit, Alternation bit. Steven D'Aprano <steve@pearwood.info> - 2015-12-30 00:22 +1100
              Re: (Execution) Termination bit, Alternation bit. "Skybuck Flying" <skybuck2000@hotmail.com> - 2015-12-29 22:43 +0100
                Re: (Execution) Termination bit, Alternation bit. Chris Angelico <rosuav@gmail.com> - 2015-12-30 11:00 +1100
                Re: (Execution) Termination bit, Alternation bit. "Skybuck Flying" <skybuck2000@hotmail.com> - 2016-01-03 02:18 +0100
                Re: (Execution) Termination bit, Alternation bit. Steven D'Aprano <steve@pearwood.info> - 2016-01-03 19:44 +1100
                Re: (Execution) Termination bit, Alternation bit. "Skybuck Flying" <skybuck2000@hotmail.com> - 2016-01-08 12:59 +0100
          Re: (Execution) Termination bit, Alternation bit. "Skybuck Flying" <skybuck2000@hotmail.com> - 2015-12-29 12:42 +0100
      Re: (Execution) Termination bit, Alternation bit. "Skybuck Flying" <skybuck2000@hotmail.com> - 2015-12-22 16:46 +0100
        Re: (Execution) Termination bit, Alternation bit. Chris Angelico <rosuav@gmail.com> - 2015-12-23 02:56 +1100
          Re: (Execution) Termination bit, Alternation bit. "Skybuck Flying" <skybuck2000@hotmail.com> - 2015-12-29 12:23 +0100
  Re: (Execution) Termination bit, Alternation bit. Rustom Mody <rustompmody@gmail.com> - 2015-12-29 20:07 -0800
    Re: (Execution) Termination bit, Alternation bit. Steven D'Aprano <steve@pearwood.info> - 2015-12-30 23:56 +1100
      Re: (Execution) Termination bit, Alternation bit. Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2015-12-30 12:19 -0500

csiph-web