From: Jere <jhb.chat@gmail.com>
Subject: Re: Portable memory barrier?
Date: Tue, 9 May 2017 17:51:45 -0700 (PDT)
Date: 2017-05-09T17:51:45-07:00 [thread overview]
Message-ID: <e92ada63-f623-437e-aec8-e69d5e3e4a7f@googlegroups.com> (raw)
In-Reply-To: <oet6vt$5h1$1@franka.jacob-sparre.dk>
On Tuesday, May 9, 2017 at 3:57:50 PM UTC-4, Randy Brukardt wrote:
> "Robert Eachus" wrote in message
> ...
> >The compiler will play some games, and certainly will leave Write_Index in
> >a register if possible.
>
> It better not is Write_Index is Atomic.
>
> Which is my point on this discussion: what the CPU does is irrelevant if the
> compiler is implemented correctly. If it isn't, then the compiler is wrong.
> QED.
>
> Only the compiler vendor need worry about this level of discussion.
> Honestly, I doubt anyone else is qualified. (I'm not, and I AM a compiler
> vendor... ;-)
>
> Randy.
Is there a method besides Atomic? If I am implementing a generic FIFO (lock
free) and the FIFO elements are complex data types that may not be able to be
atomic, do I have any other options or are protected objects my only way out?
As an example, if my FIFO was an array of some records that contained a 64 bit
integer? I know I can make the FIFO volatile, but as you indicated, that isn't
enough. I can't make it Atomic either.
next prev parent reply other threads:[~2017-05-10 0:51 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-06 2:23 Portable memory barrier? Jere
2017-05-06 8:47 ` Jeffrey R. Carter
2017-05-06 14:17 ` Jere
2017-05-06 19:08 ` Dennis Lee Bieber
2017-05-06 19:26 ` Jeffrey R. Carter
2017-05-06 19:41 ` Jeffrey R. Carter
2017-05-06 20:42 ` Niklas Holsti
2017-05-09 19:49 ` Randy Brukardt
2017-05-09 22:07 ` Jere
2017-05-11 1:14 ` Randy Brukardt
2017-05-10 18:28 ` Shark8
2017-05-11 1:17 ` Randy Brukardt
2017-05-11 16:23 ` Jeffrey R. Carter
2017-05-07 20:18 ` Robert Eachus
2017-05-08 7:45 ` Dmitry A. Kazakov
2017-05-08 15:56 ` Robert Eachus
2017-05-08 16:22 ` Dmitry A. Kazakov
2017-05-08 18:39 ` Robert Eachus
2017-05-08 19:18 ` Robert Eachus
2017-05-08 21:09 ` Dmitry A. Kazakov
2017-05-08 23:24 ` Robert Eachus
2017-05-09 0:30 ` Jere
2017-05-09 4:02 ` Robert Eachus
2017-05-09 4:32 ` Robert Eachus
2017-05-09 4:44 ` Robert Eachus
2017-05-09 22:26 ` Jere
2017-05-09 20:01 ` Randy Brukardt
2017-05-09 19:57 ` Randy Brukardt
2017-05-10 0:51 ` Jere [this message]
2017-05-10 5:25 ` J-P. Rosen
2017-05-10 22:56 ` Jere
2017-05-11 7:36 ` Dmitry A. Kazakov
2017-05-13 20:25 ` Jere
2017-05-10 7:13 ` Dmitry A. Kazakov
2017-05-10 16:45 ` Robert Eachus
2017-05-10 17:28 ` Simon Wright
2017-05-10 23:21 ` Jere
2017-05-11 0:47 ` Randy Brukardt
2017-05-13 20:11 ` Jere
2017-05-15 22:33 ` Randy Brukardt
2017-05-10 23:30 ` Jere
2017-05-11 0:38 ` Randy Brukardt
2017-05-10 16:38 ` Jeffrey R. Carter
2017-05-10 23:40 ` Jere
2017-05-10 16:19 ` Robert Eachus
2017-05-11 1:02 ` Randy Brukardt
2017-05-11 1:51 ` Robert Eachus
2017-05-15 22:45 ` Randy Brukardt
2017-05-08 20:29 ` Niklas Holsti
2017-05-08 21:09 ` Dmitry A. Kazakov
2017-05-09 4:34 ` Niklas Holsti
2017-05-09 6:16 ` Niklas Holsti
2017-05-09 8:34 ` Dmitry A. Kazakov
2017-05-09 20:18 ` Randy Brukardt
2017-05-09 20:10 ` Randy Brukardt
2017-05-09 0:05 ` Jere
2017-05-09 8:26 ` Dmitry A. Kazakov
2017-05-09 19:53 ` Randy Brukardt
2017-05-09 20:27 ` Dmitry A. Kazakov
2017-05-11 0:35 ` Randy Brukardt
2017-05-11 8:24 ` Dmitry A. Kazakov
2017-05-15 22:53 ` Randy Brukardt
2017-05-18 17:44 ` Dmitry A. Kazakov
2017-05-18 21:01 ` Randy Brukardt
2017-05-19 7:54 ` Dmitry A. Kazakov
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