NAME

       MPI_Rget -  Get data from a memory window on a remote process

SYNOPSIS

       int MPI_Rget(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_Win
                   win, MPI_Request *request)

       MPI_Rget  is  similar to MPI_Get , 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_Rget operation indicates that the data is
       available in the origin buffer. If origin_addr points to memory attached to a window, then
       the data becomes available in the private copy of this window.

INPUT PARAMETERS

       origin_addr
              - Address of the buffer in which to receive the data
       origin_count
              - number of entries in origin buffer (nonnegative integer)
       origin_datatype
              - datatype of each entry in origin buffer (handle)
       target_rank
              - rank of target (nonnegative integer)
       target_disp
              - displacement from window start to the beginning of the target buffer (nonnegative
              integer)
       target_count
              - number of entries in target buffer (nonnegative integer)
       target_datatype
              - datatype of each entry in target buffer (handle)
       win    - window object used for communication (handle)

OUTPUT PARAMETERS

       request
              - RMA request (handle)

THREAD AND INTERRUPT SAFETY

       This routine is thread-safe.  This means that this routine may be safely used by  multiple
       threads  without the need for any user-provided thread locks.  However, the routine is not
       interrupt safe.  Typically, this is due to the use of memory allocation routines  such  as
       malloc or other non-MPICH runtime routines that are themselves not interrupt-safe.

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_Get

LOCATION

       src/mpi/rma/rget.c

                                            4/24/2013                                 MPI_Rget(3)