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,FREEMAIL_FROM autolearn=unavailable autolearn_force=no version=3.4.4 X-Received: by 10.129.82.77 with SMTP id g74mr1823535ywb.50.1485496072173; Thu, 26 Jan 2017 21:47:52 -0800 (PST) X-Received: by 10.157.8.10 with SMTP id 10mr481564oty.19.1485496072095; Thu, 26 Jan 2017 21:47:52 -0800 (PST) Path: eternal-september.org!reader01.eternal-september.org!reader02.eternal-september.org!news.eternal-september.org!news.eternal-september.org!feeder.eternal-september.org!2.eu.feeder.erje.net!feeder.erje.net!2.us.feeder.erje.net!weretis.net!feeder6.news.weretis.net!feeder.usenetexpress.com!feeder1.iad1.usenetexpress.com!216.166.98.84.MISMATCH!border1.nntp.dca1.giganews.com!nntp.giganews.com!i7no383117qta.1!news-out.google.com!15ni12167itm.0!nntp.google.com!r185no561732ita.0!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail Newsgroups: comp.lang.ada Date: Thu, 26 Jan 2017 21:47:51 -0800 (PST) In-Reply-To: <8706d548-a9d5-48e5-aa6f-fd33013a2fd1@googlegroups.com> Complaints-To: groups-abuse@google.com Injection-Info: glegroupsg2000goo.googlegroups.com; posting-host=85.167.236.133; posting-account=bPTmZAoAAAC_6HP9XLKB9aAAxBa6BuOR NNTP-Posting-Host: 85.167.236.133 References: <65f79e53-a468-4b77-8ee1-440c26a09371@googlegroups.com> <8706d548-a9d5-48e5-aa6f-fd33013a2fd1@googlegroups.com> User-Agent: G2/1.0 MIME-Version: 1.0 Message-ID: <2749cdda-6e9d-4b65-a875-ca423d397213@googlegroups.com> Subject: Re: Question on type invariants From: reinkor Injection-Date: Fri, 27 Jan 2017 05:47:52 +0000 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Xref: news.eternal-september.org comp.lang.ada:33186 Date: 2017-01-26T21:47:51-08:00 List-Id: torsdag 26. januar 2017 17.18.43 UTC+1 skrev Robert Eachus f=C3=B8lgende: > Notice that it is possible that an update to A can occur while processi= ng S. =20 Maybe a hack: what about using "wait" statements. Sending a request to paus= e updating A -> wait for confirmation -> then update S ?