From: bsanden@site.gmu.edu (Bo I. Sanden)
Subject: Re: Question about the need for requeue as described in Rationale
Date: 1996/07/09
Date: 1996-07-09T00:00:00+00:00 [thread overview]
Message-ID: <4rsdfp$jo5@portal.gmu.edu> (raw)
In-Reply-To: 31E16AE7.2F7A@csehp3.mdc.com
James A. Squire (m193884@CSEHP3.MDC.COM) wrote:
: > In Ada 83, Monitor is a guardian task and the wait is implemented by
: > a statement accept Release nested within the body of accept Insist.
: You're joking! This is actually allowed in Ada? I thought for sure it
: was forbidden. In fact, I thought that was one of the reasons why the
: requeue statement was needed. Now I'm really confused.
: If you can have an accept within an accept, then why was the requeue
: statement desirable?
: --
As I see it, the advantage is that you can do away with the guardian
task and accomplish what you want with a protected unit. You end up
with one less thread and, arguably, a simpler program. The requeue
is primarily useful in protected units, in my experience.
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Dr. Bo Sanden Author of:
Mail Stop 4A4 Software Systems Construction
George Mason University with examples in Ada
Fairfax, VA 22030-4444, USA Prentice-Hall 1994
Tutorials on concurrent/real-time software design
at WAdaS and TRI-Ada
http://www.isse.gmu.edu/faculty/bsanden
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next prev parent reply other threads:[~1996-07-09 0:00 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
1996-06-20 0:00 GNAT Codesize Haug Buerger
1996-06-20 0:00 ` James E. Hopper
1996-06-21 0:00 ` Doug Smith
1996-06-21 0:00 ` Robert Dewar
1996-06-24 0:00 ` John McCabe
1996-06-24 0:00 ` John Howard
1996-06-25 0:00 ` David J. Fiander
1996-06-25 0:00 ` Robert Dewar
1996-06-26 0:00 ` Robert Dewar
1996-06-28 0:00 ` John McCabe
1996-06-28 0:00 ` Fergus Henderson
1996-06-29 0:00 ` John McCabe
1996-07-01 0:00 ` Robert Dewar
1996-07-05 0:00 ` John McCabe
1996-07-05 0:00 ` JP Thornley
1996-06-30 0:00 ` Robert Dewar
1996-07-02 0:00 ` John McCabe
1996-07-03 0:00 ` Robert Dewar
1996-06-28 0:00 ` Fergus Henderson
1996-07-01 0:00 ` Michael Feldman
1996-07-03 0:00 ` John McCabe
1996-07-02 0:00 ` John McCabe
1996-07-03 0:00 ` Robert Dewar
1996-07-06 0:00 ` John McCabe
1996-07-06 0:00 ` Robert Dewar
1996-07-06 0:00 ` Michael Feldman
1996-07-08 0:00 ` Gavin Smyth
1996-07-03 0:00 ` Question about the need for requeue as described in Rationale James A. Squire
1996-07-05 0:00 ` Bo I. Sanden
1996-07-05 0:00 ` progers
1996-07-06 0:00 ` Robert A Duff
1996-07-04 0:00 ` Samuel Tardieu
1996-07-04 0:00 ` Robert Dewar
1996-07-08 0:00 ` James A. Squire
1996-07-09 0:00 ` progers
1996-07-10 0:00 ` Robert A Duff
1996-07-10 0:00 ` progers
1996-07-08 0:00 ` James A. Squire
1996-07-08 0:00 ` Robert A Duff
1996-07-09 0:00 ` Bo I. Sanden [this message]
1996-07-08 0:00 ` James A. Squire
1996-07-09 0:00 ` Jon S Anthony
1996-06-21 0:00 ` GNAT Codesize Ralph Paul
1996-07-08 0:00 ` Question about the need for requeue as described in Rationale James A. Squire
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