From: Robert Dewar <robert_dewar@my-deja.com>
Subject: Re: Ada Protected Object Tutorial #1
Date: 1999/12/27
Date: 1999-12-27T00:00:00+00:00 [thread overview]
Message-ID: <848rus$s6v$1@nnrp1.deja.com> (raw)
In-Reply-To: 848ajb$o39$1@nntp2.atl.mindspring.net
In article <848ajb$o39$1@nntp2.atl.mindspring.net>,
Richard D Riehle <laoXhai@ix.netcom.com> wrote:
> Protected objects represent a significant
> improvement over semaphores for mutual exclusion but need to
> be used sparingly in a multi-tasking design. As your note
> implies, a protected object is not a substitute for a task.
I find this a type error :-)
Protected objects and semaphores are not the same kind of thing.
A semaphore is a particular synchronization mechanism with
advantages and disadvantages.
A protected object is a language mechanism for CREATING
synchrnonization mechanisms.
Indeed a very standard example of the use of protected types
is to implement a standard semaphore.
Sent via Deja.com http://www.deja.com/
Before you buy.
next prev parent reply other threads:[~1999-12-27 0:00 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-12-15 0:00 Ada Protected Object Tutorial #1 James S. Rogers
1999-12-16 0:00 ` Kaz Kylheku
1999-12-16 0:00 ` James S. Rogers
1999-12-17 0:00 ` Laurent Guerby
1999-12-16 0:00 ` John English
1999-12-16 0:00 ` Ed Falis
1999-12-16 0:00 ` Usenet Poster Boy
1999-12-17 0:00 ` Karel Th�nissen
1999-12-17 0:00 ` Laurent Guerby
1999-12-18 0:00 ` Kaz Kylheku
1999-12-18 0:00 ` Robert A Duff
1999-12-18 0:00 ` Kaz Kylheku
1999-12-18 0:00 ` Laurent Guerby
1999-12-18 0:00 ` Kaz Kylheku
1999-12-19 0:00 ` Laurent Guerby
1999-12-20 0:00 ` Stanley R. Allen
1999-12-21 0:00 ` Robert I. Eachus
[not found] ` <33qr5scnbs04v391ev4541p5bv48hklg3q@4ax.com>
1999-12-20 0:00 ` Robert A Duff
1999-12-18 0:00 ` Karel Th�nissen
1999-12-18 0:00 ` Laurent Guerby
1999-12-17 0:00 ` Mike Silva
1999-12-24 0:00 ` Kenneth Almquist
1999-12-17 0:00 ` Tucker Taft
1999-12-18 0:00 ` Kaz Kylheku
1999-12-18 0:00 ` Robert A Duff
1999-12-18 0:00 ` Kaz Kylheku
1999-12-19 0:00 ` swhalen
1999-12-19 0:00 ` Kaz Kylheku
1999-12-19 0:00 ` Robert Dewar
1999-12-19 0:00 ` Laurent Guerby
1999-12-20 0:00 ` Vladimir Olensky
1999-12-26 0:00 ` Ehud Lamm
1999-12-26 0:00 ` Robert Dewar
1999-12-26 0:00 ` Kaz Kylheku
1999-12-27 0:00 ` Robert Dewar
1999-12-27 0:00 ` Richard D Riehle
1999-12-27 0:00 ` Robert Dewar [this message]
1999-12-31 0:00 ` Richard D Riehle
1999-12-27 0:00 ` Jean-Pierre Rosen
1999-12-27 0:00 ` Robert Dewar
2000-01-02 0:00 ` Tucker Taft
1999-12-17 0:00 ` Robert A Duff
1999-12-17 0:00 ` Vladimir Olensky
1999-12-17 0:00 ` Robert A Duff
1999-12-18 0:00 ` Kaz Kylheku
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