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I believe from the following: "The Interix Pthread implementation is built upon the thread functionality already provided by the Windows kernel. " from http://technet.microsoft.com/en-us/library/bb463209.aspx#EEAA that the interix implementation is a wrapper as much as the other windows implementations. If nobody corrects me here in a week or two I'll go ahead and update it as such. Rogerdpack (talk) 04:59, 22 July 2012 (UTC)