On May 14, 2015, at 11:29 PM, Chaitra Kumar <chaitragku...@gmail.com> wrote:
> 
> We are developing an application which can handle only POSIX threads and 
> POSIX synchronization APIs.   I would like to know if the OpenMPI runtime 
> implementation makes use of the POSIX threads and POSIX synchronization APIs 
> (lock, mutex, semaphore, signal, etc.) or not,  in particular, the 
> communication/buffer management layer. 

Yes, it does.

If you have specific questions about the internals of the Open MPI code base, 
you probably want to ask them on the "devel" list:

    http://www.open-mpi.org/mailman/listinfo.cgi/devel

-- 
Jeff Squyres
jsquy...@cisco.com
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