From: kilgallen@eisner.decus.org (Larry Kilgallen)
Subject: Re: Waiver question
Date: 1997/05/02
Date: 1997-05-02T00:00:00+00:00 [thread overview]
Message-ID: <1997May2.063334.1@eisner> (raw)
In-Reply-To: E9J2rB.G04@world.std.com
In article <E9J2rB.G04@world.std.com>, bobduff@world.std.com (Robert A Duff) writes:
> Strange semantics, IMHO. Pragma Pack is all about time-vs-space
> trade-offs, but it has this weird side-effect on tasking semantics. We
> should have a way to *declare* things independently adressable, but the
> default should be that things are not.
I do not understand why you feel the default should be task-unsafe.
The general trend in Ada seems to be that safeguards are enabled by
default and disabled by explicit statement.
In addition to multiprocessing considerations, there are also
efficiency reasons for having the compiler put each variable
into a separate Alpha longword (or set thereof).
The only wasted resource is memory, and typical applications on
Alpha have lots. Others can declare their preference for the
task-unsafe version on particular constructs.
Certainly defaulting to task-safe seems to be a lot more friendly
for those porting programs in from other platforms.
Larry Kilgallen
next prev parent reply other threads:[~1997-05-02 0:00 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
1997-04-18 0:00 Waiver question Ken Garlington
1997-04-19 0:00 ` Tom Moran
1997-04-20 0:00 ` Dean Runzel
1997-04-22 0:00 ` Ken Garlington
1997-04-20 0:00 ` Steve Doiel
1997-04-20 0:00 ` Robert Dewar
1997-04-21 0:00 ` Ken Garlington
1997-04-22 0:00 ` Ken Garlington
1997-04-23 0:00 ` Corey Minyard
1997-04-24 0:00 ` Richard Kenner
1997-04-28 0:00 ` Larry Kilgallen
1997-04-28 0:00 ` Corey Minyard
1997-04-29 0:00 ` Kaz Kylheku
1997-04-29 0:00 ` Robert Dewar
1997-04-29 0:00 ` Laurent Guerby
1997-04-30 0:00 ` Corey Minyard
1997-04-29 0:00 ` Richard Kenner
1997-04-30 0:00 ` Robert A Duff
1997-05-01 0:00 ` Kaz Kylheku
1997-05-02 0:00 ` Robert A Duff
1997-05-02 0:00 ` Larry Kilgallen [this message]
1997-05-02 0:00 ` Robert Dewar
1997-05-02 0:00 ` Robert A Duff
1997-05-02 0:00 ` Larry Kilgallen
1997-05-03 0:00 ` Robert A Duff
1997-05-03 0:00 ` Larry Kilgallen
1997-05-04 0:00 ` Robert Dewar
1997-05-04 0:00 ` Robert Dewar
1997-05-06 0:00 ` John M. Mills
1997-04-30 0:00 ` Robert Dewar
1997-05-01 0:00 ` Larry Kilgallen
1997-05-07 0:00 ` Bad .diff files in gnat-3.09 in Linux Benoit Jauvin-Girard
1997-05-09 0:00 ` Albert K. Lee
1997-04-29 0:00 ` Waiver question Robert Dewar
1997-04-23 0:00 ` Tarjei Jensen
1997-04-21 0:00 ` Robert I. Eachus
1997-04-21 0:00 ` Robert Dewar
1997-04-22 0:00 ` Robert I. Eachus
1997-04-23 0:00 ` Robert Dewar
1997-04-22 0:00 ` Ken Garlington
1997-04-23 0:00 ` Robert S. White
1997-04-24 0:00 ` Robert Dewar
1997-04-24 0:00 ` Steve Vestal
1997-04-25 0:00 ` Robert I. Eachus
1997-04-25 0:00 ` Ken Garlington
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