MPI_Sendrecv_replace - Sends and receives using a single
       buffer


SYNOPSIS

       C:

            #include <mpi.h>

            int MPI_Sendrecv_replace( buf, count, datatype, dest,
            sendtag, source, recvtag, comm, status )
            void         *buf;
            int           count, dest, sendtag, source, recvtag;
            MPI_Datatype  datatype;
            MPI_Comm      comm;
            MPI_Status   *status;

       C++:

            #include <mpi.h>

            void Comm::Sendrecv_replace(
            void*             buf,
            int               count,
            const Datatype&   datatype,
            int               dest,
            int               sendtag,
            int               source,
            int               recvtag) const

       Fortran:

            INCLUDE "mpif.h" (or USE MPI)

            <type> BUF(*)
            INTEGER count, datatype, dest, sendtag, source, recvtag,
            comm, status(MPI_STATUS_SIZE), ierror

            CALL MPI_SENDRECV_REPLACE(buf, count, datatype, dest, sendtag,
            source, recvtag, comm, status(MPI_STATUS_SIZE), ierror)


STANDARDS

       This release implements the MPI 1.2 standard, as
       documented by the MPI Forum in the spring 1997 release of
       MPI:  A Message Passing Interface Standard.


DESCRIPTION

       The MPI_Sendrecv_replace routine uses a single buffer to
       perform send and receive operations.  This routine accepts
       the following parameters:

                 receive buffer (integer)

       datatype  Specifies the type of elements in the send and
                 receive buffer (handle)

       dest      Specifies the rank of the destination (integer)

       sendtag   Specifies the send message tag (integer)

       source    Specifies the rank of the source (integer)

       recvtag   Specifies the receive message tag (integer)

       comm      Specifies the communicator (handle)

       buf       Returns the initial address of the send and
                 receive buffer (choice)

       status    Returns the status object (status)

       ierror    Specifies the return code value for successful
                 completion, which is in MPI_SUCCESS.
                 MPI_SUCCESS is defined in the mpif.h file.


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