Subject: Re: CVS commit: src/sys/sys
To: None <email@example.com>
From: Jason Thorpe <firstname.lastname@example.org>
Date: 12/29/2007 07:21:09
Sorry, trying to catch up, here...
I object to this change for a couple of reasons:
1- It makes us incompatible with the Solaris atomic API, which was a
major goal of mine.
2- On most platforms I wrote code for, the sub-word ops were, in fact,
implemented in terms of a 32-bit CAS.
I'm pretty sure I documented the possible oddities of sub-word ops in
the man pages I wrote on the thorpej-atomic branch.
On Nov 27, 2007, at 5:30 PM, Andrew Doran wrote:
> Module Name: src
> Committed By: ad
> Date: Wed Nov 28 01:30:06 UTC 2007
> Modified Files:
> src/sys/sys: atomic.h
> Log Message:
> Remove the sub-word atomic ops because they can not be implemented
> on some architectures and so are misleading. The same effect can be
> had by
> building on top of the 32-bit CAS. As a side effect this makes it
> easier to complete and document the operations across all platforms.
> To generate a diff of this commit:
> cvs rdiff -r1.2 -r1.3 src/sys/sys/atomic.h
> Please note that diffs are not public domain; they are subject to the
> copyright notices on the relevant files.