Subj : Re: Memory visibility with Pthreads
To   : comp.programming.threads
From : Peter Dimov
Date : Sun Aug 14 2005 05:39 am

Maciej Sobczak wrote:

> This means that the platform is allowed to reorder the first thread 1
> from this (the original version):
>
> A = 10;
> lock
> B = 10;
> unlock
>
> to this (because it does not change anything from the point of view of
> any thread):
>
> lock
> A = 10;
> B = 10;
> unlock

and this:

lock
B = 10;
A = 10;
unlock

> but *not* to this:
> 
> lock
> B = 10;
> unlock
> A = 10;

.