semaphores and Rlocks

[Jive Dadson]

Can someone tell me how semaphores and rlocks are implemented under Win32?  I would expect them to be simple wrappers around MS Windows semaphore and critical section thingymadoodles, but grepping through the source code I do not find CreateSemaphore or any of that stuff anywhere.  Can anyone tell me what files to look in?

Also, do the UNIX and Mac versions wrap around standard OS stuff, p_threads, and whatnot?

Best regards,
Jive