NAME

       MPI_Get -  One Sided data fetch

SYNOPSIS

       #include <mpi.h>
       int
       MPI_Get(orgaddr, orgcnt, orgtype, rank, targdisp, targcnt, targtype, win)

       void                  *orgaddr;
       int                   orgcnt;
       MPI_Datatype           orgtype;
       int                   rank;
       MPI_Aint               targdisp;
       int                   targcnt;
       MPI_Datatype           targtype;
       MPI_Win               win;

INPUT PARAMETERS

       orgaddr
              - initial address of origin buffer (choice)
       orgcnt - number of entries in origin buffer (nonnegative integer)
       orgtype
              - datatype of each entry in origin buffer (handle)
       rank   - rank of target (nonnegative integer)
       targdisp
              - displacement from window start to the beginning of the target buffer (nonnegative
              integer)
       targcnt
              - number of entries in target buffer (nonnegative integer)
       targtype
              - datatype of each entry in target buffer (handle)
       win    - window object used for communication (handle)

NOTES

       Similar to MPI_PUT, except that the direction of  data  transfer  is  reversed.  Data  are
       copied  from  the  target  memory  to  the  origin.  The  origin_datatype  may not specify
       overlapping entries in the origin buffer. The target buffer must be contained  within  the
       target window, and the copied data must fit, without truncation, in the origin buffer.

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.

USAGE WITH IMPI EXTENSIONS

       The IMPI standard only supports MPI-1 functions.  Hence, this function  is  currently  not
       designed to operate within an IMPI job.

ERRORS

       If  an  error occurs in an MPI function, the current MPI error handler is called to handle
       it.  By default, this error handler aborts the MPI job.  The error handler may be  changed
       with  MPI_Errhandler_set  ;  the predefined error handler MPI_ERRORS_RETURN may be used to
       cause error values to be returned (in C and Fortran; this error handler is less useful  in
       with  the  C++  MPI  bindings.   The predefined error handler MPI::ERRORS_THROW_EXCEPTIONS
       should be used in C++ if the error value needs to be recovered).  Note that MPI  does  not
       guarantee that an MPI program can continue past an error.

       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.  The C++ bindings for
       MPI  do  not  return  error  values;  instead,  error  values are communicated by throwing
       exceptions of type MPI::Exception (but not by default).  Exceptions are only thrown if the
       error value is not MPI::SUCCESS .

       Note that if the MPI::ERRORS_RETURN handler is set in C++, while MPI functions will return
       upon an error, there will be no way to recover what the actual error value was.
       MPI_SUCCESS
              - No error; MPI routine completed successfully.
       MPI_ERR_WIN
              - Invalid window.  A common error is to use a null window in a call.
       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_OTHER
              - Other error; use MPI_Error_string to get more information about this error code.
       MPI_ERR_EPOCH
              - This error indicates than an operation has been attempted on a  "closed"  window.
              Certain  one-sided operations can only be performed on windows whose epoch has been
              started with MPI_Win_start.
       MPI_ERR_INTERN
              - An internal error has been detected.  This is fatal.  Please send a bug report to
              the LAM mailing list (see http://www.lam-mpi.org/contact.php ).
       MPI_ERR_TYPENOTSUP
              -  Type  not  supported  for  this  operation.   This  typically  applies to either
              reduction operations (for  which  only  a  limited  combination  of  datatypes  and
              operations are defined, see MPI-1, section 4.9.2) or one-sided operations where the
              actions on specific datatpyes have not been implemented yet.

SEE ALSO

       MPI_Put(3), MPI_Accumulate(3), MPI_Win_create(3),  MPI_Win_start(3),  MPI_Win_complete(3),
       MPI_Win_fence(3),     MPI_Win_free(3),     MPI_Win_get_group(3),     MPI_Win_get_group(3),
       MPI_Win_wait(3)

MORE INFORMATION

       For more information, please see the official MPI Forum web site, which contains the  text
       of both the MPI-1 and MPI-2 standards.  These documents contain detailed information about
       each MPI function (most of which is not duplicated in these man pages).

       http://www.mpi-forum.org/

LOCATION

       get.c