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,af960bc705aaf51b X-Google-Attributes: gid103376,public X-Google-ArrivalTime: 2002-03-02 22:53:21 PST Path: archiver1.google.com!news1.google.com!newsfeed.stanford.edu!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!feed2.news.rcn.net!rcn!newsfeed1.earthlink.net!newsfeed.earthlink.net!newsmaster1.prod.itd.earthlink.net!newsread1.prod.itd.earthlink.net.POSTED!not-for-mail Message-ID: <3C81C852.395A160A@acm.org> From: Jeffrey Carter X-Mailer: Mozilla 4.7 [en] (Win98; U) X-Accept-Language: en MIME-Version: 1.0 Newsgroups: comp.lang.ada Subject: Re: Complexity of protected objects References: <3C7A75F2.30503@worldnet.att.net> <3c7e7c60.8192226@news.cis.dfn.de> <3C7FBD74.D434411E@boeing.com> <5ee5b646.0203021706.75f53f62@posting.google.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Date: Sun, 03 Mar 2002 06:53:18 GMT NNTP-Posting-Host: 209.86.208.239 X-Complaints-To: abuse@earthlink.net X-Trace: newsread1.prod.itd.earthlink.net 1015138398 209.86.208.239 (Sat, 02 Mar 2002 22:53:18 PST) NNTP-Posting-Date: Sat, 02 Mar 2002 22:53:18 PST Organization: EarthLink Inc. -- http://www.EarthLink.net X-Received-Date: Sat, 02 Mar 2002 22:53:20 PST (newsmaster1.prod.itd.earthlink.net) Xref: archiver1.google.com comp.lang.ada:20712 Date: 2002-03-03T06:53:18+00:00 List-Id: Robert Dewar wrote: > > Jeffrey Carter wrote in message news:<3C7FBD74.D434411E@boeing.com>... > > > Certain language-defined subprograms are potentially blocking. In > > particular, the subprograms of the language-defined input-output > > packages that manipulate files (implicitly or explicitly) are > > potentially blocking. > > > > Thus, I/O as always potentially blocking because the > > language defines it as such. > > Umm, I am afraid our syllogistic apparatus is malfunctioning here. The > predicate said (I will > shout to make sure no one else misses it) LANGUAGE-DEFINED > input-output packages. Actually it said subprograms of language-defined input-output packages that manipulate files. On the other hand, I think that covers all the language-defined I/O packages, and most of their subprograms. Yes, I was slightly imprecise, and should have written "Language-defined I/O is always potentially blocking", but as the start of the discussion referred to calling Ada.Text_IO operations from protected operations, I didn't think the additional qualification was necessary. -- Jeff Carter "I wave my private parts at your aunties." Monty Python & the Holy Grail