On Tuesday 18 March 2008 07:26, Craig Rasmussen wrote:

My test so far indicate that this works fine too. �As I recall, � �type MPI_HANDLE � � � �private � � � �type(C_INT) :: handle � �end type MPI_HANDLE worked for those implementations. �Since MPI_HANDLE is an opaque � type, the implementer has freedom to define it as she wishes. To recap: This is likely to work on a lot of implementations (includes MPI+C ABI), but it is not guaranteed by the Fortran (or C) standards. C structs are different from plain integers and *may* be passed differently. Ultimately, I think if the design is such that it works fast on most (existing) implementations and *can* be implemented by wrappers on some more peculiar systems, it is OK. Best, Aleks

-- Aleksandar Donev, Ph.D. Lawrence Postdoctoral Fellow @ Lawrence Livermore National Laboratory High Performance Computational Materials Science and Chemistry E-mail: [email protected] Phone: (925) 424-6816 Fax: (925) 423-0785 Address: P.O.Box 808, L-367, Livermore, CA 94551-9900 Web: http://cherrypit.princeton.edu/donev