From: Reto Buerki <reet@codelabs.ch>
Subject: Re: Barrier re-evaluation issue with GNAT 4.3.2
Date: Tue, 29 Sep 2009 10:30:44 +0200
Date: 2009-09-29T10:30:44+02:00 [thread overview]
Message-ID: <h9sgj7$1qr$1@news.eternal-september.org> (raw)
In-Reply-To: <h9qv8m$nus$1@news.tornevall.net>
Jeffrey R. Carter wrote:
> Reto Buerki wrote:
>>
>> Update: we just noticed that the warning actually *does* show up but we
>> missed it in the previous build.
>>
>> I also think the warning is irrelevant. It seems that the compiler is
>> not smart enough to figure out that the Signal() entry is always open.
>
> An entry call is always potentially blocking, regardless of its barrier;
> see ARM 9.5.1. Technically, this code contains a bounded error. Since
> the potentially blocking operation was detected, your program should
> raise Program_Error; GNAT pretends that it hasn't detected that the
> operation is potentially blocking and lets you get away with only a
> warning. Other compilers (and even other versions of GNAT) may actually
> raise Program_Error.
Thanks for the clarification and the pointer to the ARM. This basically
means that our workaround is not legal Ada code ...
next prev parent reply other threads:[~2009-09-29 8:30 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-24 17:02 Barrier re-evaluation issue with GNAT 4.3.2 Reto Buerki
2009-09-24 17:47 ` Dmitry A. Kazakov
2009-09-25 8:50 ` Brad Moore
2009-09-25 9:17 ` Dmitry A. Kazakov
2009-09-25 9:57 ` Ludovic Brenta
2009-09-25 10:31 ` Dmitry A. Kazakov
2009-09-25 11:23 ` Jean-Pierre Rosen
2009-09-28 10:41 ` Reto Buerki
2009-09-25 17:06 ` Brad Moore
2009-09-25 18:42 ` Dmitry A. Kazakov
2009-09-25 19:39 ` Brad Moore
2009-09-28 10:18 ` Reto Buerki
2009-09-25 15:56 ` John B. Matthews
2009-09-26 14:23 ` John B. Matthews
2009-09-28 10:28 ` Reto Buerki
2009-09-28 12:39 ` John B. Matthews
2009-09-28 13:25 ` Reto Buerki
2009-09-28 14:05 ` Reto Buerki
2009-09-28 18:38 ` Jeffrey R. Carter
2009-09-28 18:51 ` Dmitry A. Kazakov
2009-09-29 8:37 ` Reto Buerki
2009-09-28 21:13 ` Robert A Duff
2009-09-28 22:28 ` Jeffrey R. Carter
2009-10-10 5:41 ` Randy Brukardt
2009-09-29 8:30 ` Reto Buerki [this message]
2009-09-29 15:06 ` John B. Matthews
2009-09-30 14:12 ` Reto Buerki
2009-09-30 15:59 ` John B. Matthews
2009-10-01 16:12 ` John B. Matthews
2009-10-01 17:17 ` Anh Vo
2009-10-02 2:26 ` John B. Matthews
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