From: jbg@sei.cmu.edu (John Goodenough)
Subject: Re: Types defining h/w r/o or w/o registers
Date: 5 Jun 91 13:59:54 GMT [thread overview]
Message-ID: <26529@as0c.sei.cmu.edu> (raw)
In-Reply-To: als@bohra.cpg.oz.au's message of 4 Jun 91 14:48:21 GMT
In article Re: Types defining h/w r/o or w/o registers of 4 Jun 91 14:48:21 GMT als@bohra.cpg.oz.au (Anthony Shipman) writes:
>Wasn't there something in the tasking part of the language for this? Ada's
>multi-tasking model is shared memory between tasks. I vaguely recall there was
>a pragma, or something in the machine-dependant chapter, to declare certain
>memory locations as volatile. Certainly what you have is logically equivalent
>to multi-tasking except that one of the tasks is implemented in hardware.
You are talking here about pragma SHARED, which is not suitable for use with
volatile data. The Ada 9X study report on shared variables (available from
the usual sources) discusses why pragma SHARED doesn't fit the bill.
John B. Goodenough Goodenough@sei.cmu.edu
Software Engineering Institute 412-268-6391
next prev parent reply other threads:[~1991-06-05 13:59 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
1991-05-30 13:03 Types defining h/w r/o or w/o registers Don Gardner
1991-05-31 17:03 ` david.c.willett
1991-05-31 17:10 ` david.c.willett
1991-05-31 17:26 ` J o s e D u a r t e
1991-06-01 8:34 ` Orville R. Weyrich
1991-06-01 10:01 ` Types defining h/w r/o or w/o regis stt
1991-06-02 16:54 ` Types defining h/w r/o or w/o registers rharwood
1991-06-03 7:57 ` Orville R. Weyrich
1991-06-04 14:08 ` John Goodenough
1991-06-04 14:48 ` Anthony Shipman
1991-06-05 13:59 ` John Goodenough [this message]
-- strict thread matches above, loose matches on Subject: below --
1991-06-05 18:59 John Goodenough
1991-06-06 3:02 Steven V. Case
1991-06-09 0:15 ` rharwood
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