From: john@assen.demon.co.uk (John McCabe)
Subject: Re: Ada is almost useless in embedded systems
Date: 1996/02/18
Date: 1996-02-18T00:00:00+00:00 [thread overview]
Message-ID: <824684479.9342@assen.demon.co.uk> (raw)
In-Reply-To: dewar.824581573@schonberg
dewar@cs.nyu.edu (Robert Dewar) wrote:
>John McCabe says
>"> What pragma shared is _not_ is a directive to enforce no optimisation
>> of an object. On the other hand, this is exactly what the C volatile
>> qualifier is."
>Not quite, in particular the "exactly" here is confusing. THe exact
>definition of volatile is a little tricky (but quite precise). The
>meaning of "optimization" is also tricky and not at all precise.
As far as K&RII is concerned, in the section in the back with the
annotations it explains the purpose of the volatile qualifier as being
to ensure that the compiler doesn't optimize e.g. redundant
assignments etc on a particular object.
I'll check the book when I get to work tomorrow and give you the exact
comment if you want.
Best Regards
John McCabe <john@assen.demon.co.uk>
next prev parent reply other threads:[~1996-02-18 0:00 UTC|newest]
Thread overview: 80+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <823906039.22113@assen.demon.co.uk>
[not found] ` <4fgrq3$mc4@qualcomm.com>
[not found] ` <dewar.823962356@schonberg>
1996-02-17 0:00 ` Ada is almost useless in embedded systems Tore Joergensen
1996-02-17 0:00 ` Robert Dewar
1996-02-19 0:00 ` Keith Thompson
1996-02-19 0:00 ` John McCabe
1996-02-21 0:00 ` Richard A. O'Keefe
1996-02-21 0:00 ` Norman H. Cohen
1996-02-19 0:00 ` Jon S Anthony
[not found] ` <824056183.18993@assen.demon.co.uk>
[not found] ` <311E924E.74CE@escmail.orl.mmc.com>
1996-02-17 0:00 ` Ada is great for embedded systems (was Ada is almost useless in embedded systems) Ken & Virginia Garlington
[not found] ` <4fnqpm$3nh@news.sanders.lockheed.com>
1996-02-19 0:00 ` Ada is almost useless in embedded systems AdaWorks
1996-02-21 0:00 ` Ken Garlington
1996-02-21 0:00 ` Hugh Dunne
[not found] ` <4fnp37$nj1@theopolis.orl.mmc.com>
1996-02-22 0:00 ` Alan Brain
1996-02-19 0:00 ` AdaWorks
1996-02-21 0:00 ` Ken Garlington
1996-02-23 0:00 ` AdaWorks
1996-02-19 0:00 ` R.A.L Williams
1996-02-21 0:00 ` Richard A. O'Keefe
[not found] ` <emery-0902962215150001@line316.nwm.mindlink.net>
[not found] ` <DMoA85.52I@eskimo.com>
[not found] ` <823965654.4500@assen.demon.co.uk>
[not found] ` <824165619.14894@assen.demon.co.uk>
[not found] ` <JSA.96Feb13133713@organon.com>
[not found] ` <824259217.26321@assen.demon.co.uk>
1996-02-17 0:00 ` Robert Dewar
1996-02-18 0:00 ` John McCabe
1996-02-18 0:00 ` Robert Dewar
1996-02-19 0:00 ` John McCabe
1996-02-20 0:00 ` Robert Dewar
1996-02-21 0:00 ` Fergus Henderson
[not found] ` <824332550.2485@assen.demon.co.uk>
1996-02-17 0:00 ` Ken & Virginia Garlington
1996-02-17 0:00 ` Robert Dewar
1996-02-18 0:00 ` John McCabe [this message]
1996-02-18 0:00 ` Robert Dewar
1996-02-19 0:00 ` John McCabe
[not found] ` <4fs7ml$cf1@rational.rational.com>
1996-02-26 0:00 ` Ada 83 " Alan Brain
1996-02-26 0:00 ` Ada is almost useless " R.A.L Williams
[not found] ` <4h3q56$1vk@goanna.cs.rmit.EDU.AU>
[not found] ` <dewar.825635955@schonberg>
[not found] ` <826571250.140@assen.demon.co.uk>
[not found] ` <dewar.826634800@schonberg>
1996-03-21 0:00 ` John McCabe
1996-03-23 0:00 ` Side-effect arithmetic again [was: Ada ... in embedded systems] John G. Volan
1996-03-23 0:00 ` Robert Dewar
1996-03-25 0:00 ` Tucker Taft
1996-03-25 0:00 ` Norman H. Cohen
1996-03-25 0:00 ` Robert A Duff
1996-03-26 0:00 ` John G. Volan
1996-03-26 0:00 ` Robert Dewar
1996-03-29 0:00 ` Robert I. Eachus
1996-03-26 0:00 ` Robert A Duff
1996-03-26 0:00 ` Tore Joergensen
1996-03-27 0:00 ` John G. Volan
1996-03-27 0:00 ` John G. Volan
1996-03-28 0:00 ` Tucker Taft
1996-03-28 0:00 ` Robert Dewar
1996-03-29 0:00 ` Tucker Taft
1996-03-29 0:00 ` Tucker Taft
1996-03-27 0:00 ` John G. Volan
1996-03-29 0:00 ` Robert A Duff
1996-03-30 0:00 ` John G. Volan
1996-03-30 0:00 ` John G. Volan
1996-03-31 0:00 ` AdaWorks
1996-04-01 0:00 ` Robert A Duff
[not found] ` <RALW.96Feb28100925@vulcan.gmrc.gecm.com>
1996-03-15 0:00 ` Ada is almost useless in embedded systems Robert I. Eachus
[not found] ` <dirk.827148504@demokrit>
1996-03-18 0:00 ` David Weller
1996-03-18 0:00 ` Alan Brain
[not found] ` <4ik5bm$ogg@dayuc.dayton.saic.com>
1996-03-18 0:00 ` Side-effect arithmetic again [was: Ada ... in embedded systems] Robert Dewar
1996-03-19 0:00 ` Jay Martin
1996-03-21 0:00 ` Robert I. Eachus
1996-03-19 0:00 ` Norman H. Cohen
[not found] ` <dewar.825775334@schonberg>
[not found] ` <RALW.96Mar8113005@vulcan.gecm.com>
[not found] ` <4hv2fb$6ra@cville-srv.wam.umd.edu>
[not found] ` <4xybp895y6.fsf@leibniz.enst-bretagne.fr>
[not found] ` <3144CC40.33A0@escmail.orl.mmc.com>
[not found] ` <dewar.826604375@schonberg>
[not found] ` <3145FF2C.6139@escmail.orl.mmc.com>
[not found] ` <dewar.826829407@schonberg>
[not found] ` <31499D21.1DA6@escmail.orl.mmc.com>
1996-03-15 0:00 ` Bug or Limitation? (was: Ada is almost useless in embedded systems) Robert Dewar
1996-03-16 0:00 ` Ted Dennison
1996-03-20 0:00 ` Side-effect arithmetic again [was: Ada ... in embedded systems] Robert I. Eachus
1996-03-20 0:00 ` John G. Volan
1996-03-22 0:00 ` Alan Brain
1996-03-20 0:00 ` Robert A Duff
1996-03-21 0:00 ` Peter Hermann
1996-03-21 0:00 ` Robert Dewar
1996-03-25 0:00 ` Robert I. Eachus
1996-03-28 0:00 ` Mats Weber
1996-03-29 0:00 ` John G. Volan
1996-03-21 0:00 ` Geert Bosch
1996-03-26 0:00 ` Mats Weber
1996-03-16 0:00 ` Ada is almost useless in embedded systems Kevin Dalley
[not found] <9603131418.AA01642@eight-ball>
1996-03-15 0:00 ` Norman H. Cohen
1996-03-15 0:00 ` Robert Dewar
1996-03-18 0:00 ` Stephen Crawley
1996-03-18 0:00 ` Peter Hermann
1996-03-18 0:00 ` Robert Dewar
1996-03-19 0:00 ` Laurent Guerby
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