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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

       /tmp/gyCYfBi4J6/mpich-3.1/src/mpi/rma/rget.c

                                   2/20/2014                       MPI_Rget(3)



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