From: wojtek@power.com.pl (Wojtek Narczynski)
Subject: Re: Reprise: 'in out' parameters for functions
Date: 15 Apr 2004 18:52:01 -0700
Date: 2004-04-15T18:52:01-07:00 [thread overview]
Message-ID: <5ad0dd8a.0404151752.4f598e1a@posting.google.com> (raw)
In-Reply-To: 8Oadneu6eY9pweDdRVn-hA@comcast.com
>> Or the simplest possible: two protected counters, try to get the
>> sum atomically.
> Since this is trivial, I can only assume that you have two protected
> counters with no support for external locking in mind.
I had in mind implementing it without the need to resort to
abstraction inversion, which I understand as -for example-
implementing semaphores over protected objects, which are implemented
over semaphores.
> Actually, you can even do that, by having one counter have a Sum operation
> that calls the other. However, this whole subject is probably silly.
Yes, this is silly because I oversimplifed the problem.
The original problem I run into was how to implement a highly
concurrent, space and time efficient list, tree, and finally lock
manager.
And before that, I wanted to grab a ready implementation of this
(list, tree) from some library, but I could not find such a thing...
> Reminds me of a lot of improvement requests for Ada 9X. "We want to do
> such and such."
>
> "Well, here is a simple example of how to do it in current Ada."
>
> "Oh, but our software development plan doesn't allow us to use
> Unchecked_Conversion."
Yes, I should probably have dropped protected type in favor of raw
semaphores.
Regards,
Wojtek
next prev parent reply other threads:[~2004-04-16 1:52 UTC|newest]
Thread overview: 90+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <u4qrv5hwr.fsf@acm.org>
2004-04-08 17:19 ` Reprise: 'in out' parameters for functions Alexander E. Kopilovich
[not found] ` <bRecOT0TxF@VB1162.spb.edu>
2004-04-08 23:46 ` Stephen Leake
2004-04-09 9:23 ` Florian Weimer
2004-04-09 10:04 ` Dmitry A. Kazakov
2004-04-09 11:23 ` Martin Krischik
2004-04-09 12:44 ` Dmitry A. Kazakov
2004-04-09 22:48 ` Randy Brukardt
2004-04-14 14:40 ` Robert I. Eachus
2004-04-14 21:20 ` Randy Brukardt
2004-04-09 22:47 ` Florian Weimer
2004-04-10 10:49 ` Dmitry A. Kazakov
2004-04-10 11:11 ` Florian Weimer
2004-04-10 13:26 ` Dmitry A. Kazakov
2004-04-10 20:50 ` Georg Bauhaus
2004-04-11 10:31 ` Dmitry A. Kazakov
2004-04-09 11:27 ` Stephen Leake
2004-04-09 22:46 ` Randy Brukardt
2004-04-09 13:12 ` Wojtek Narczynski
2004-04-09 15:48 ` Expressing physical units (Was: Reprise: 'in out' parameters for functions) Jacob Sparre Andersen
2004-04-10 13:07 ` Wojtek Narczynski
2004-04-10 13:52 ` Jacob Sparre Andersen
2004-04-11 2:45 ` Hyman Rosen
2004-04-11 10:14 ` Expressing physical units Jacob Sparre Andersen
2004-04-11 16:05 ` Hyman Rosen
2004-04-12 6:58 ` Expressing physical units (Was: Reprise: 'in out' parameters for functions) Russ
2004-04-12 10:29 ` Dmitry A. Kazakov
2004-04-13 6:52 ` Russ
2004-04-13 10:55 ` Dmitry A. Kazakov
2004-04-14 4:50 ` Hyman Rosen
2004-04-14 8:49 ` Dmitry A. Kazakov
2004-04-14 16:49 ` Hyman Rosen
2004-04-15 10:37 ` Dmitry A. Kazakov
2004-04-14 7:10 ` Russ
2004-04-14 8:53 ` tmoran
2004-04-14 9:01 ` Vinzent 'Gadget' Hoefler
2004-04-14 9:21 ` Dmitry A. Kazakov
2004-04-13 9:53 ` Wojtek Narczynski
2004-04-15 21:27 ` Expressing physical units Jacob Sparre Andersen
2004-04-16 11:40 ` Dmitry A. Kazakov
2004-04-09 16:17 ` Reprise: 'in out' parameters for functions Georg Bauhaus
2004-04-10 2:28 ` Wojtek Narczynski
2004-04-10 9:46 ` Georg Bauhaus
2004-04-10 10:49 ` Dmitry A. Kazakov
2004-04-10 15:35 ` Wojtek Narczynski
2004-04-10 21:01 ` Georg Bauhaus
2004-04-10 21:16 ` Georg Bauhaus
2004-04-11 13:20 ` exception parameters Stephen Leake
2004-04-12 10:29 ` Dmitry A. Kazakov
2004-04-13 0:58 ` Stephen Leake
2004-04-13 1:30 ` Randy Brukardt
2004-04-13 8:04 ` Jean-Pierre Rosen
2004-04-11 10:31 ` Reprise: 'in out' parameters for functions Dmitry A. Kazakov
2004-04-12 22:02 ` Randy Brukardt
2004-04-13 10:56 ` Dmitry A. Kazakov
2004-04-14 21:12 ` Randy Brukardt
2004-04-15 10:37 ` Dmitry A. Kazakov
2004-04-13 9:30 ` Wojtek Narczynski
2004-04-13 12:00 ` Dmitry A. Kazakov
2004-04-13 22:41 ` Wojtek Narczynski
2004-04-14 8:49 ` Dmitry A. Kazakov
2004-04-14 15:03 ` Wojtek Narczynski
2004-04-15 10:37 ` Dmitry A. Kazakov
2004-04-16 0:29 ` Wojtek Narczynski
2004-04-16 11:36 ` Dmitry A. Kazakov
2004-04-16 19:25 ` Wojtek Narczynski
2004-04-14 15:57 ` Robert I. Eachus
2004-04-15 8:04 ` Dmitry A. Kazakov
2004-04-10 12:32 ` Wojtek Narczynski
2004-04-14 15:46 ` Robert I. Eachus
2004-04-16 1:52 ` Wojtek Narczynski [this message]
2004-04-16 5:40 ` Robert I. Eachus
2004-04-16 11:38 ` Wojtek Narczynski
2004-04-16 16:30 ` Robert I. Eachus
2004-04-16 18:38 ` Randy Brukardt
2004-04-16 22:15 ` Wojtek Narczynski
2004-04-17 1:20 ` Robert I. Eachus
2004-04-17 11:42 ` Wojtek Narczynski
2004-04-17 14:14 ` Robert I. Eachus
2004-04-16 19:28 ` Wojtek Narczynski
2004-04-09 17:09 ` Pascal Obry
2004-04-10 2:37 ` Wojtek Narczynski
[not found] <u8yh75y33.fsf@acm.org>
2004-04-07 23:54 ` Alexander E. Kopilovich
[not found] ` <WLZI9T09aE@VB1162.spb.edu>
2004-04-08 2:21 ` Stephen Leake
2004-04-07 20:31 Stephen Leake
2004-04-08 18:42 ` Georg Bauhaus
2004-04-08 20:32 ` Randy Brukardt
2005-01-12 15:15 ` okellogg
2005-01-12 20:14 ` Randy Brukardt
2004-04-08 23:48 ` Stephen Leake
2004-04-13 14:45 ` Robert I. Eachus
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