From: Stephen Leake <stephen_leake@acm.org>
To: comp.lang.ada@ada-france.org
Subject: Re: Ada compiler differences
Date: Wed, 20 Oct 2004 09:05:50 -0400
Date: 2004-10-20T09:05:50-04:00 [thread overview]
Message-ID: <mailman.38.1098277591.10401.comp.lang.ada@ada-france.org> (raw)
Simon Wright <simon@pushface.org> writes:
> Stephen Leake <stephen_leake@acm.org> writes:
>
> > Hmm. If the Language Reference Manual does not _explicitly_ state
> > that a particular function is safe for calling from multiple tasks,
> > then you must assume it is not, and provide your own layer of task
> > protection for it. I suspect Nick has been violating this rule.
>
> What, even Generic_Elementary_Functions.Arctan?!
Well, you have a point. Although, on a system without floating point
hardware, this _could_ use a global cache of previously computed
results, which _could_ be not task safe.
> On the other hand, anyone who called Float_Random from two tasks
> *with the same generator* would be entitled to expect truly random
> results. I think you have to be prepared to use your wits sometimes
> ..
It could also be argued that the LRM _should_ say more about what is
guarranteed to be task safe.
--
-- Stephe
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next reply other threads:[~2004-10-20 13:05 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-20 13:05 Stephen Leake [this message]
2004-10-20 17:17 ` Ada compiler differences Nick Roberts
2004-10-20 19:44 ` Simon Wright
2004-10-21 21:02 ` Nick Roberts
-- strict thread matches above, loose matches on Subject: below --
2004-10-20 1:32 Stephen Leake
2004-10-20 5:47 ` Simon Wright
2004-10-26 0:28 ` Randy Brukardt
2004-10-18 12:47 Magnus
2004-10-18 14:01 ` Jacob Sparre Andersen
2004-10-18 18:31 ` Luke A. Guest
2004-10-18 19:55 ` Nick Roberts
2004-10-19 20:52 ` Luke A. Guest
2004-10-20 1:16 ` Jeffrey Carter
2004-10-18 21:03 ` Martin Dowie
2004-10-19 2:11 ` Jeffrey Carter
2004-10-18 20:36 ` Nick Roberts
2004-10-18 21:48 ` Mark H Johnson
2004-10-19 14:49 ` Larry Kilgallen
2004-10-19 20:32 ` Mark H Johnson
2004-10-20 16:48 ` Warren W. Gay VE3WWG
2004-10-21 13:54 ` Larry Kilgallen
2004-10-21 20:57 ` Warren W. Gay VE3WWG
2004-10-21 21:05 ` Mark H Johnson
2004-10-26 15:23 ` Larry Kilgallen
2004-10-26 21:21 ` Mark H Johnson
2004-10-27 4:39 ` Larry Kilgallen
2004-10-27 13:49 ` Mark H Johnson
2004-10-20 8:02 ` Rod Chapman
2004-10-21 13:55 ` Larry Kilgallen
2004-10-22 8:13 ` Rod Chapman
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