From: "Jeffrey R. Carter" <spam.jrcarter.not@spam.acm.org>
Subject: Re: requeue with abort and timed call
Date: Mon, 05 Jan 2009 02:48:05 GMT
Date: 2009-01-05T02:48:05+00:00 [thread overview]
Message-ID: <Fxe8l.455437$TT4.171236@attbi_s22> (raw)
In-Reply-To: <gwc1w1s43e4.1v29vob1eu1o0$.dlg@40tude.net>
Dmitry A. Kazakov wrote:
>
> No, it is perfectly legal to use Put_Line in protected actions *with* GNAT.
>
> GNAT implementation explicitly permits this use. So Jeffrey's comment was
> irrelevant here.
No, the use of Ada.Text_IO.Put_Line in a protected action is a bounded error
with *all* compilers, GNAT included. A bounded error is an error, therefore this
use is an error for all compilers.
What happens in the case of a bounded error is compiler dependent. GNAT 6.1.1
gives me a warning if I use a delay statement in a protected operation, but
otherwise allows it. Another compiler might choose to raise Program_Error at run
time.
> Pedantically, you should have added pragma Atomic (Z), because you access
> it from different tasks. And probably Volatile (Z) to prevent loop
> optimization.
It's more than pedantic if you have multiple processors.
> for I in Unsigned_64'Range loop
> exit when Clock >= T;
> end loop;
loop
exit when ...
end loop;
--
Jeff Carter
"Hello! Smelly English K...niggets."
Monty Python & the Holy Grail
08
next prev parent reply other threads:[~2009-01-05 2:48 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-28 13:24 requeue with abort and timed call ishikawa
2008-12-28 14:30 ` Dmitry A. Kazakov
2008-12-28 15:53 ` christoph.grein
2008-12-28 16:09 ` christoph.grein
2008-12-28 17:46 ` ishikawa
2008-12-29 10:23 ` christoph.grein
2008-12-29 10:55 ` Dmitry A. Kazakov
2008-12-29 11:17 ` christoph.grein
2008-12-29 12:27 ` Dmitry A. Kazakov
2008-12-28 17:16 ` Dmitry A. Kazakov
2008-12-28 21:42 ` Robert A Duff
2008-12-29 10:42 ` Jean-Pierre Rosen
2008-12-29 21:05 ` sjw
2008-12-30 9:25 ` Jean-Pierre Rosen
2008-12-30 13:18 ` christoph.grein
2008-12-30 15:39 ` Jean-Pierre Rosen
2008-12-30 17:01 ` christoph.grein
2008-12-30 17:16 ` ishikawa
2008-12-30 15:54 ` ishikawa
2008-12-30 21:33 ` sjw
2008-12-30 22:52 ` Robert A Duff
2008-12-31 9:21 ` Jean-Pierre Rosen
2008-12-31 15:39 ` christoph.grein
2008-12-31 16:14 ` Jean-Pierre Rosen
2009-01-03 16:49 ` ishikawa
2009-01-03 21:09 ` Jeffrey R. Carter
2009-01-04 15:40 ` christoph.grein
2009-01-04 17:09 ` Jeffrey R. Carter
2009-01-04 18:03 ` ishikawa
2009-01-04 18:56 ` Dmitry A. Kazakov
2009-01-04 23:17 ` belteshazzar
2009-01-05 9:12 ` Dmitry A. Kazakov
2009-01-05 2:48 ` Jeffrey R. Carter [this message]
2009-01-05 9:30 ` Dmitry A. Kazakov
2009-01-05 20:28 ` Jeffrey R. Carter
2009-01-05 20:47 ` Dmitry A. Kazakov
2009-01-06 2:35 ` Jeffrey R. Carter
2009-01-05 10:17 ` Jean-Pierre Rosen
2008-12-28 15:53 ` sjw
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