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MPI_Get(3) MPI MPI_Get(3)

NAME

MPI_Get - Get 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)




int MPI_Get_c(void *origin_addr, MPI_Count origin_count,
MPI_Datatype origin_datatype, int target_rank,
MPI_Aint target_disp, MPI_Count target_count,
MPI_Datatype target_datatype, MPI_Win win)










INPUT PARAMETERS



  

  
- number of entries in origin buffer (non-negative integer)

  

  
- datatype of each entry in origin buffer (handle)

  

  
- rank of target (non-negative integer)

  

  
- displacement from window start to the beginning of the target buffer
      (non-negative integer)

  

  
- number of entries in target buffer (non-negative integer)

  

  
- datatype of each entry in target buffer (handle)

  

  
- window object used for communication (handle)
    

  








OUTPUT PARAMETERS



  

  
- initial address of origin buffer (choice)
    

  








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 guarantee that an MPI
    program can continue past an error; however, MPI implementations will
    attempt to continue whenever possible.





  

  
- No error; MPI routine completed successfully.

  

  
- Invalid buffer pointer. Usually a null buffer where one is not
    valid.

  

  
- Invalid count argument. Count arguments must be non-negative; a count of
      zero is often valid.

  

  
-

  

  
- 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 .
    

  

  

  
- Invalid datatype argument. Additionally, this error can occur if an
      uncommitted MPI_Datatype (see MPI_Type_commit ) is used in a
      communication call.

  

  
- Invalid MPI window object

  

  
- Other error; use MPI_Error_string to get more information about
      this error code.
    

  








SEE ALSO


MPI_Rget







  

    2/9/2024