NAME

       MPI_Raccumulate  -  Accumulate data into the target process using remote memory access and
       return a request handle for the operation.

SYNOPSIS

       int MPI_Raccumulate(const void *origin_addr, int origin_count, MPI_Datatype
                          origin_datatype, int target_rank, MPI_Aint
                          target_disp, int target_count, MPI_Datatype
                          target_datatype, MPI_Op op, MPI_Win win,
                          MPI_Request *request)

       MPI_Raccumulate is similar to MPI_Accumulate , except that it  allocates  a  communication
       request  object  and associates it with the request handle (the argument request) that can
       be used to wait or test for completion.  The completion of  an  MPI_Raccumulate  operation
       indicates  that  the  origin  buffer  is free to be updated. It does not indicate that the
       operation has completed at the target window.

INPUT PARAMETERS

       origin_addr
              - initial address of buffer (choice)
       origin_count
              - number of entries in buffer (nonnegative integer)
       origin_datatype
              - datatype of each buffer entry (handle)
       target_rank
              - rank of target (nonnegative integer)
       target_disp
              - displacement from start of window to  beginning  of  target  buffer  (nonnegative
              integer)
       target_count
              - number of entries in target buffer (nonnegative integer)
       target_datatype
              - datatype of each entry in target buffer (handle)
       op     - predefined reduce operation (handle)
       win    - window object (handle)

OUTPUT PARAMETERS

       request
              - RMA request (handle)

NOTES

       The  basic  components  of both the origin and target datatype must be the same predefined
       datatype (e.g., all MPI_INT or all MPI_DOUBLE_PRECISION ).

NOTES FOR FORTRAN

       All MPI routines in Fortran (except for MPI_WTIME  and  MPI_WTICK  )  have  an  additional
       argument  ierr  at  the  end  of  the  argument list.  ierr is an integer and has the same
       meaning as the  return  value  of  the  routine  in  C.   In  Fortran,  MPI  routines  are
       subroutines, and are invoked with the call statement.

       All MPI objects (e.g., MPI_Datatype , MPI_Comm ) are of type INTEGER in Fortran.

ERRORS

       All  MPI  routines  (except MPI_Wtime and MPI_Wtick ) return an error value; C routines as
       the value of the function and Fortran routines in the last argument.  Before the value  is
       returned,  the current MPI error handler is called.  By default, this error handler aborts
       the MPI  job.   The  error  handler  may  be  changed  with  MPI_Comm_set_errhandler  (for
       communicators),  MPI_File_set_errhandler  (for files), and MPI_Win_set_errhandler (for RMA
       windows).  The MPI-1 routine MPI_Errhandler_set may be used but  its  use  is  deprecated.
       The  predefined  error  handler  MPI_ERRORS_RETURN may be used to cause error values to be
       returned.  Note that MPI does not guarentee that an  MPI  program  can  continue  past  an
       error; however, MPI implementations will attempt to continue whenever possible.

       MPI_SUCCESS
              - No error; MPI routine completed successfully.
       MPI_ERR_ARG
              -  Invalid  argument.  Some argument is invalid and is not identified by a specific
              error class (e.g., MPI_ERR_RANK ).
       MPI_ERR_COUNT
              - Invalid count argument.  Count arguments must be non-negative; a count of zero is
              often valid.
       MPI_ERR_RANK
              -  Invalid  source or destination rank.  Ranks must be between zero and the size of
              the  communicator  minus  one;  ranks  in  a  receive  (  MPI_Recv  ,  MPI_Irecv  ,
              MPI_Sendrecv , etc.) may also be MPI_ANY_SOURCE .

       MPI_ERR_TYPE
              -   Invalid   datatype   argument.    May   be  an  uncommitted  MPI_Datatype  (see
              MPI_Type_commit ).
       MPI_ERR_WIN
              - Invalid MPI window object

SEE ALSO

       MPI_Accumulate

LOCATION

       src/mpi/rma/raccumulate.c

                                            4/24/2013                          MPI_Raccumulate(3)