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=-1.3 required=5.0 tests=BAYES_00,INVALID_MSGID autolearn=no autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 103376,894846be18e92713 X-Google-Attributes: gid103376,public From: dewar@cs.nyu.edu (Robert Dewar) Subject: Re: GNAT R/T Annex and Win95 Date: 1996/04/18 Message-ID: #1/1 X-Deja-AN: 148363519 references: <3174712D.71C7@ee.ubc.ca> organization: Courant Institute of Mathematical Sciences newsgroups: comp.lang.ada Date: 1996-04-18T00:00:00+00:00 List-Id: Greg says "My understanding is that Win95 uses a timesliced scheduling policy for threads, and that GNAT tasks are mapped to Win95 threads. How is GNAT's fixed priority preemptive scheduling policy supported if this is the case?" Time-slicing has nothing to do with fixed-priorities per se, or with preemption. It *does* have to do with run-till-blocked. Ada 95 does not require run-till-blocked semantics unless the RT annex is supported fully. Not all OS's can support the real time annex, and clearly GNAT on such a system does not support the annex (this is assuming tasks are mapped to threads). On NT, you can map to the real time threads, and all is well, but I don't know if this applies to Win95. Anyway, Greg, you are making undocumented assjmptions here!