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=unavailable autolearn_force=no version=3.4.4 Path: border1.nntp.ams3.giganews.com!border2.nntp.ams3.giganews.com!border2.nntp.ams2.giganews.com!border4.nntp.ams.giganews.com!border2.nntp.ams.giganews.com!nntp.giganews.com!feeder.erje.net!us.feeder.erje.net!v102.xanadu-bbs.net!xanadu-bbs.net!nntp.club.cc.cmu.edu!micro-heart-of-gold.mit.edu!newsswitch.lcs.mit.edu!nntp.TheWorld.com!.POSTED!not-for-mail From: Robert A Duff Newsgroups: comp.lang.ada Subject: Re: Ada advocacy Date: Tue, 18 Jun 2013 15:22:38 -0400 Organization: The World Public Access UNIX, Brookline, MA Message-ID: References: <19595886.4450.1332248078686.JavaMail.geo-discussion-forums@vbbfy7> <2012032020582259520-rblove@airmailnet> <12ee9bc5-3bdf-4ac0-b805-5f10b3859ff4@googlegroups.com> <6c58fae4-6c34-4d7a-ab71-e857e55897c0@x6g2000vbj.googlegroups.com> NNTP-Posting-Host: shell01.theworld.com Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: pcls6.std.com 1371583359 6478 192.74.137.71 (18 Jun 2013 19:22:39 GMT) X-Complaints-To: abuse@TheWorld.com NNTP-Posting-Date: Tue, 18 Jun 2013 19:22:39 +0000 (UTC) User-Agent: Gnus/5.1008 (Gnus v5.10.8) Emacs/21.3 (irix) Cancel-Lock: sha1:6meSP1Ne5IApO0IjMCTad8KLxdY= X-Original-Bytes: 1916 Xref: number.nntp.dca.giganews.com comp.lang.ada:181925 Date: 2013-06-18T15:22:38-04:00 List-Id: Bill Findlay writes: > Do you mean conditional critical regions? > > They did have barriers, but Brinch Hansen and Hoare differed as to whether > they should be anchored at the start, e.g.: I don't remember the details. Barriers in Ada are tied to the entry, as opposed to being separate from the "monitor". And I seem to recall some by-hand management of queues in Concurrent Pascal that is done automatically in Ada. But my memory of Concurrent Pascal is hazy! - Bob