On Tue, Jun 10, 2008 at 4:19 PM, Helge Deller <deller@gmx.de> wrote: > Yes. > > #define UNLOCKED {-1,-1,-1,-1} Perfect. That will work just fine. The only reason I couldn't use this for NPTL, was that all the algorithms were written expecting "compare and swap" semantics, and rewriting core threading code was not my idea of a fun time. Cheers, Carlos.