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=-1.9 required=5.0 tests=BAYES_00 autolearn=ham
	autolearn_force=no version=3.4.4
X-Google-Language: ENGLISH,ASCII-7-bit
X-Google-Thread: 103376,80b3e504140e89fd
X-Google-Attributes: gid103376,public
X-Google-ArrivalTime: 2002-06-20 13:53:06 PST
Path: 
 archiver1.google.com!news1.google.com!newsfeed.stanford.edu!canoe.uoregon.edu!hammer.uoregon.edu!skates!not-for-mail
From: Stephen Leake <stephen.a.leake.1@gsfc.nasa.gov>
Newsgroups: comp.lang.ada
Subject: Re: Config_Files proposal
Date: 20 Jun 2002 16:45:59 -0400
Organization: NASA Goddard Space Flight Center (skates.gsfc.nasa.gov)
Message-ID: <u3cvhsmpk.fsf@gsfc.nasa.gov>
References: <uwuswy0qr.fsf@gsfc.nasa.gov> <3D0FAC67.A4861809@san.rr.com>
 <uu1nzw8n3.fsf@gsfc.nasa.gov> <3D10B6B1.AFE9D4E8@san.rr.com>
 <uznxrun8p.fsf@gsfc.nasa.gov> <3D10E046.E604231D@san.rr.com>
 <uadpqujxc.fsf@gsfc.nasa.gov> <3D1204B5.4620F160@san.rr.com>
 <3D1215A8.719D39C5@nbi.dk> <u1yb1u3ek.fsf@gsfc.nasa.gov>
 <3D123852.1040508@san.rr.com>
NNTP-Posting-Host: anarres.gsfc.nasa.gov
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
X-Trace: skates.gsfc.nasa.gov 1024606418 7356 128.183.220.71 (20 Jun 2002
 20:53:38 GMT)
X-Complaints-To: usenet@news.gsfc.nasa.gov
NNTP-Posting-Date: 20 Jun 2002 20:53:38 GMT
User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.2
Xref: archiver1.google.com comp.lang.ada:26522
Date: 2002-06-20T20:53:38+00:00
List-Id: <comp.lang.ada>

Darren New <dnew@san.rr.com> writes:

> Stephen Leake wrote:
> > 1) Simply forbid simultaneous and/or concurrent access to a single
> >    config file (as the requirements currently state).
> 
> I think "forbid simultaneous access" is fine. But that's not what
> you're doing. You're doing "screw the user if there's simultaneous
> access." Kind of the way C "forbids" indexing off the end of an array.
> ;-)

Well, that's true; I'm only "forbidding" in the requirements and the
user guide, not in the code. But what else can I do, without assuming
more about what the operating system can do?

I'd like to use either Ada.Text_IO, or some Gnat package to do all the
file management stuff. I don't think there is any support for locking
in there, but I'll admit I haven't really looked.

It would be nice if we only use Ada.Text_IO, because then it will be
more portable to other compilers.

-- 
-- Stephe