[Haskell-cafe] Re: Support for lock-free/wait-free programming?

[Gabriel Wicke]

On Tue, 17 Aug 2010 01:09:41 -0400, Gregory Collins wrote:

> Hello all,
> 
> Does GHC expose any primitives for things like atomic compare-and-swap?
> I can't seem to find anything in the docs. 

Hello Gregory,

I have recently published experimental and low-level FFI bindings to 
GCC's 
atomic primitives including CAS as 'bits-extras' on Hackage [1].
Instances for Int and Word types are included.

This is likely lower-level than what you are after, but might still be 
handy for experimentation.

Kind regards

Gabriel

[1]: http://hackage.haskell.org/packages/archive/bits-extras/0.1.0/doc/
html/Data-Bits-Atomic.html