From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-0.3 required=5.0 tests=BAYES_00,
	REPLYTO_WITHOUT_TO_CC autolearn=no autolearn_force=no version=3.4.4
X-Google-Thread: 103376,3e11ef4efc073f6b
X-Google-Attributes: gid103376,domainid0,public,usenet
X-Google-Language: ENGLISH,ASCII-7-bit
Path: 
 g2news2.google.com!news2.google.com!border1.nntp.dca.giganews.com!nntp.giganews.com!nx02.iad.newshosting.com!newshosting.com!newsfeed.icl.net!newsfeed.fjserv.net!newsfeed.freenet.de!news.tu-darmstadt.de!newsfeed.velia.net!noris.net!newsfeed.arcor.de!newsspool1.arcor-online.net!news.arcor.de.POSTED!not-for-mail
From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: requeue with abort and timed call
Newsgroups: comp.lang.ada
User-Agent: 40tude_Dialog/2.0.15.1
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Reply-To: mailbox@dmitry-kazakov.de
Organization: cbb software GmbH
References: 
 <2a60b044-6a5c-4ce6-93e6-6eeefc8806c3@l33g2000pri.googlegroups.com>
  <1f6rcb1qwt7vx.1mckzyk9ucohf.dlg@40tude.net>
 <84c56781-1cb1-4d86-be14-e66fc9fdade6@w1g2000prk.googlegroups.com>
 <7p8onuvzdz18$.1m1dq8n3b52q5.dlg@40tude.net> <9j9ajg.3a7.ln@hunter.axlog.fr>
 <2a0a1de3-6736-4478-9378-50b8895fa20d@r15g2000prh.googlegroups.com>
 <kepcjg.od.ln@hunter.axlog.fr>
 <a2cbdab7-d410-4bc3-b06b-43370454855b@r15g2000prh.googlegroups.com>
 <jjdfjg.9r6.ln@hunter.axlog.fr>
 <133a14c1-efc1-4a27-bc66-cff24a75ef93@z28g2000prd.googlegroups.com>
 <mq5gjg.bai.ln@hunter.axlog.fr>
 <a0204e36-2c30-4c5f-916c-a47a9fd23d3d@w39g2000prb.googlegroups.com>
 <4uQ7l.509148$yE1.49118@attbi_s21>
 <bf1f36fd-60ab-4d0a-ab4d-feb5f225685b@v5g2000prm.googlegroups.com>
 <gwc1w1s43e4.1v29vob1eu1o0$.dlg@40tude.net>
 <Fxe8l.455437$TT4.171236@attbi_s22>
 <r8lsnbykeonu$.1q023a2jh4kbk.dlg@40tude.net>
 <y3u8l.456458$TT4.322120@attbi_s22>
Date: Mon, 5 Jan 2009 21:47:37 +0100
Message-ID: <gopizvy97acl.9z90wdsqgv8x.dlg@40tude.net>
NNTP-Posting-Date: 05 Jan 2009 21:47:41 CET
NNTP-Posting-Host: 3dfe10ec.newsspool1.arcor-online.net
X-Trace: 
 DXC=lOK0oS;MaQC74okIm;?DS@ic==]BZ:afN4Fo<]lROoRA^YC2XCjHcbITPFk8flE51ADNcfSJ;bb[EIRnRBaCd<MNjJmeI4kiNGC:FK2Y@VNJgO
X-Complaints-To: usenet-abuse@arcor.de
Xref: g2news2.google.com comp.lang.ada:4183
Date: 2009-01-05T21:47:41+01:00
List-Id: <comp.lang.ada>

On Mon, 05 Jan 2009 20:28:14 GMT, Jeffrey R. Carter wrote:

> Dmitry A. Kazakov wrote:
>> 
>> There is an easy way out. They could say that GNAT's Ada.Text_IO.Put_Line
>> is not potentially blocking.
> 
> No, the ARM specifies that all the operations of the language-defined I/O pkgs 
> are potentially blocking.

RM only says "In particular, the subprograms of the language-defined
input-output packages that manipulate files (implicitly or explicitly) are
potentially blocking." 9.5.1 (18). If Put_Line does not manipulate files,
then it is OK. "file" is not defined anyway.

>> Here they are in violation. Since they detected a delay statement within a
>> protected action, they should have raised Protected_Error.
> 
> I think the ARM gives the implementation the right to decide whether or not to 
> raise an exception if it detects the problem.

But RM 9.5.1 (17) is specific "If the bounded error is detected,
Program_Error is raised." No permission given to ignore it.

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de