... cs(3)
> > Seems same as AIX 4?

Yes, identical.

> 
> Hmm, does anyone want to produce new s_lock code for AIX that uses
> compare_and_swap?  But I'm not sure that's the problem here.

I did once, but performance was worse, so I discarded it.
Since AIX 5 still has it, I see no reason to change it.

Still, testing it on AIX 5 might reveal that compare_and_swap 
is now faster, Tatsuo ?

Andreas

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