From: Stephen Leake <stephen_leake@stephe-leake.org>
Subject: Re: Status of AdaCL: Ada Class Library
Date: Thu, 25 Feb 2010 07:23:22 -0500
Date: 2010-02-25T07:23:22-05:00 [thread overview]
Message-ID: <u3a0py05h.fsf@stephe-leake.org> (raw)
In-Reply-To: hm4ds3$62k$1@munin.nbi.dk
"Randy Brukardt" <randy@rrsoftware.com> writes:
> Am 22.02.2010, 02:51 Uhr, schrieb Björn Persson <bjorn@rombobjörn.se>:
>
>> I had intended to switch from Charles to Ada.Containers, but I changed my
>> mind when I learned that Ada.Containers can't even be read by multiple
> > tasks at once.
>
> For the record, we've studied this several times and have always concluded
> that hidden synchronization is dangerous. That is, synchronization should be
> explicit. Beyond that, it is impossible to come up with a reasonable
> definition of what should be locked -- it really depends on the use of the
> containers.
I agree with this, but I think the OP was implying that you needed
locking even for read-only access of Ada.Containers from multiple
tasks; is that true? I don't see why it should be; each task declares
its own cursors, which don't interfere with each other.
Of course, there's nothing enforcing the read-only, so this is not
very safe.
--
-- Stephe
next prev parent reply other threads:[~2010-02-25 12:23 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-21 22:09 Status of AdaCL: Ada Class Library Michael R
2010-02-22 1:51 ` Björn Persson
2010-02-22 2:07 ` Michael R
2010-02-24 19:56 ` Martin Krischik
2010-02-24 23:48 ` Randy Brukardt
2010-02-25 9:22 ` Georg Bauhaus
2010-02-25 12:23 ` Stephen Leake [this message]
2010-02-25 14:16 ` Alex R. Mosteo
2010-02-25 20:19 ` sjw
2010-02-24 19:54 ` Martin Krischik
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