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Groups > comp.lang.python > #100735

Re: (Execution) Termination bit, Alternation bit.

From Chris Angelico <rosuav@gmail.com>
Newsgroups comp.lang.python
Subject Re: (Execution) Termination bit, Alternation bit.
Date 2015-12-23 02:56 +1100
Message-ID <mailman.62.1450799815.2237.python-list@python.org> (permalink)
References (4 earlier) <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>

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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

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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

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