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-Thread: 103376,16594902ce57591b X-Google-Attributes: gid103376,public X-Google-Language: ENGLISH,ASCII-7-bit Path: g2news2.google.com!news3.google.com!border1.nntp.dca.giganews.com!nntp.giganews.com!wns13feed!worldnet.att.net!attbi_s21.POSTED!53ab2750!not-for-mail From: "Jeffrey R. Carter" Organization: jrcarter at acm dot org User-Agent: Thunderbird 1.5.0.8 (Windows/20061025) MIME-Version: 1.0 Newsgroups: comp.lang.ada Subject: Re: Multitasking and containers References: <143yx0dos45nx.159wpxvfevtt8.dlg@40tude.net> <1164623427.5986.11.camel@localhost> In-Reply-To: <1164623427.5986.11.camel@localhost> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Message-ID: NNTP-Posting-Host: 12.201.97.213 X-Complaints-To: abuse@mchsi.com X-Trace: attbi_s21 1164652856 12.201.97.213 (Mon, 27 Nov 2006 18:40:56 GMT) NNTP-Posting-Date: Mon, 27 Nov 2006 18:40:56 GMT Date: Mon, 27 Nov 2006 18:41:00 GMT Xref: g2news2.google.com comp.lang.ada:7707 Date: 2006-11-27T18:41:00+00:00 List-Id: Georg Bauhaus wrote: > > But "parallel systems require delicate handmade work" is probably > not good advice at all, because (a) parallel systems operate in parallel > and there isn't a sharing issue in the first place, no protection is > needed. (b) When systems start communicating, and if it were true > that concurrency requires delicate handmade work, why then use a > language like Ada? The delicacies of the mechanisms behind tasks > and shared protected objects are hidden in Ada RTSs. Therefore, if > parallel systems do require delicate handmade work, the language > designers should abandon Ada tasks and protected objects, because > obviously they cannot meet the requirements of parallel systems. I guess we have different interpretations of "delicate handmade work". I took it simply to mean custom implementations tailored to the specific project (such as a container that does not need protection for reads). I guess only Kazakov can tell us for sure. -- Jeff Carter "My brain hurts!" Monty Python's Flying Circus 21