Re: [boost] [lock-free] CDS -yet another lock-free library

Subject: Re: [boost] [lock-free] CDS -yet another lock-free library
From: Helge Bahmann (hcb_at_[hidden])
Date: 2010-03-30 02:58:39

On Tue, 30 Mar 2010, Khiszinsky, Maxim wrote:

> Steven Watanabe wrote:
>
>>> The problem is that the compiler (in some cases) generates case-based code when 'order' parameter is constant for caller
>
>> Have you actually observed this?  On which compilers?
>
> MS Visual C++ 2008, GCC 4.3

I can't second this.

Sure, if you turn optimization off, code looks ridiculous. Both gcc 
(tested with various versions ranging from 3.3 to 4.4) and msvc (visual 
studio express) optimize the switch/case with constant operand into 
nothingness.

Whether templating helps is somewhat besiders the point if the C++0x 
interface for atomic operations is specified to use parameters.

I would however be very interested in sparc and ia64 atomic operations, 
would you be interested in implementing (or lending me a hand) them for 
boost.atomic?

Best regards,
Helge