[Omp] atomic directive semantics

[Richard Henderson]

On Fri, Sep 23, 2005 at 09:56:45AM +0200, Dieter an Mey wrote:
> Why can't we just go abandon atomic and let the compiler try to optimize 
> the critical region?

Because it implies different semantics on the reader side.

Lock-less data structures are very nice to program with.  It normally
requires a compare-and-swap operation to be useful though; something
not provided by the omp atomic.


r~