Subj : Re: What does Memory Barriers mean ??
To   : comp.programming.threads
From : Joseph Seigh
Date : Mon Jan 10 2005 09:14 am

On Mon, 10 Jan 2005 14:15:15 +0100, Alexander Terekhov <terekhov@web.de> wrote:

>
> David Schwartz wrote:
> [...]
>>     Nonsense. Few people would willingly use such a compiler, and compilers
>> like VC++ and gcc are not compilers like that. If your code/compiler works
>> at one optimization level and not another, there's either a bug in your code
>> or a bug in the compiler.
>
> Single-threaded "observable behavior" aside for a moment, neither
> gcc not VC++ have any meaningful MT memory model that would allow
> programmers express memory isolation and reordering constrains
> imposed on compiler and/or "hardware." So in practice, it all
> "works" by accident, so to say.
>
And the ones that work by accident get to be certfied as Posix compliant.
I'd be suprised if any compilers worked on purpose.


Joe Seigh

.