Thanks for sharing. You can find production quality and higher performance implementations of a lot of these synchronization algorithms (and more) at http://concurrencykit.org/ (available publicly for almost 3 years now).

I do question some of the results. I was disappointed with the actual lock implementations of libslock as they are anything but performant. The implementations need much more than prefetchw optimizations (many of the implementations are half as fast as they should be).