[RFC] libstdc++ atomicity, x86 agnostic version

[Paolo Carlini]

Paolo Carlini wrote:

> It's needed something completely different, but basically *every real 
> world* test on a multi processor machine or in a MT environment can 
> only be negatively affected by not inlining the operations done at 
> construction and destruction time.

Of course non-MT performance is affected too (as soon as you construct 
and destroy many times, basically, always in the real world ;), only, in 
that case, one can conceivably remove completely the atomic operations.

Paolo.