15c4ae3391
Any non-blocking P2P function should set the request to something else then MPI_REQUEST_NULL, when passed a source/dest of MPI_PROC_NULL. Introduce a new ompi_request_empty, which returns the MPI_SOURCE=MPI_PROC_NULL, MPI_TAG=MPI_ANY_TAG, count=0 as specified by the MPI-standard. This commit was SVN r6611.
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...more to write here
should be a short file, referring to the real docs.