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=-0.9 required=5.0 tests=BAYES_00,FORGED_GMAIL_RCVD, FREEMAIL_FROM autolearn=no autolearn_force=no version=3.4.4 X-Google-Thread: 103376,950fad2e9e9717b3 X-Google-Attributes: gid103376,domainid0,public,usenet X-Google-Language: ENGLISH,ASCII Path: g2news1.google.com!postnews.google.com!j35g2000yqh.googlegroups.com!not-for-mail From: Gene Newsgroups: comp.lang.ada Subject: Re: Platform independent calendar Date: Sun, 7 Dec 2008 11:38:34 -0800 (PST) Organization: http://groups.google.com Message-ID: <41eb8695-1b6d-4e0f-9ef2-263ad409b28b@j35g2000yqh.googlegroups.com> References: NNTP-Posting-Host: 74.44.132.95 Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Trace: posting.google.com 1228678714 10737 127.0.0.1 (7 Dec 2008 19:38:34 GMT) X-Complaints-To: groups-abuse@google.com NNTP-Posting-Date: Sun, 7 Dec 2008 19:38:34 +0000 (UTC) Complaints-To: groups-abuse@google.com Injection-Info: j35g2000yqh.googlegroups.com; posting-host=74.44.132.95; posting-account=-BkjswoAAACC3NU8b6V8c50JQ2JBOs04 User-Agent: G2/1.0 X-HTTP-UserAgent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.04506.648),gzip(gfe),gzip(gfe) Xref: g2news1.google.com comp.lang.ada:2925 Date: 2008-12-07T11:38:34-08:00 List-Id: On Dec 7, 12:40=A0pm, Mike H wrote: > In message > , > "RasikaSriniva...@gmail.com" writes > > >really curious why you would think Calendar package is ruled out? > >regards, srini > > It will be a pair of embedded micro-controllers communicating with each > other on a peer to peer basis with logging, archiving and control on a > PC. Date-stamps on records produced by one machine need to be > interpreted on another. That means a confirmed mix of hardware and a > possible mix of Ada compilers. They must be programmed in Ada for two > reasons. Firstly, I know no other language and secondly the finished > product will be subject to scrutiny by the UK railway inspectorate. In > such circumstances platform independence would seem to be a convenient > road to go down. > > Having come out of retirement at the age of 75 I admit to the > possibility of being out of touch. So if you would like to try to > persuade me otherwise, I shall be happy to listen. Just in case you're unfamiliar, you'll probably want to check out global clock/timestamp sychronization/ algorithms. There are many references, for example http://portal.acm.org/citation.cfm?id=3D305619.3056= 31