MPI_Get(3)

NAME
MPI_Get - Gets data from a memory window on a remote process

SYNOPSIS
int MPI_Get(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)

INPUT PARAMETERS
origin_addr
    - Address of the buffer in which to receive the data
origin_count
    - number of entries in origin buffer (non-negative integer)
origin_datatype
    - datatype of each entry in origin buffer (handle)
target_rank
    - rank of target (non-negative integer)
target_disp
    - displacement from window start to the beginning of the target buffer (non-negative integer)
target_count
    - number of entries in target buffer (non-negative integer)
target_datatype
    - datatype of each entry in target buffer (handle)
win - window object used for communication (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, the reason is the use of memory allocation routines such as malloc or other non-MPICH runtime routines that are not interrupt-safe.

NOTES FOR FORTRAN
All MPI routines in Fortran (except 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 (for example, 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 guarantee 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 (for example, 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 receiving ( MPI_Recv , MPI_Irecv , MPI_Sendrecv , etc.) may also be MPI_ANY_SOURCE .
MPI_ERR_TYPE
    - Invalid datatype argument. Additionally, this error can occur if an uncommitted MPI_Datatype (see MPI_Type_commit ) is used in a communication call.
MPI_ERR_WIN
    - Invalid MPI window object

SEE ALSO
MPI_Rget

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