NAME

       MPI_Pack -  Packs a datatype into contiguous memory

SYNOPSIS

       int MPI_Pack(const void *inbuf,
                    int incount,
                    MPI_Datatype datatype,
                    void *outbuf,
                    int outsize,
                    int *position,
                    MPI_Comm comm)

INPUT PARAMETERS

       inbuf  - input buffer start (choice)
       incount
              - number of input data items (non-negative integer)
       datatype
              - datatype of each input data item (handle)
       outsize
              - output buffer size, in bytes (non-negative integer)
       comm   - communicator for packed message (handle)

OUTPUT PARAMETERS

       outbuf - output buffer start (choice)

INPUT/OUTPUT PARAMETERS

       position
              - current position in buffer, in bytes (integer)

NOTES (FROM THE SPECIFICATIONS)

       The  input  value  of  position  is the first location in the output buffer to be used for
       packing.  position is incremented by the size of the packed message, and the output  value
       of position is the first location in the output buffer following the locations occupied by
       the packed message.  The comm argument is the communicator that will be subsequently  used
       for sending the packed message.

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

                                            11/12/2016                                MPI_Pack(3)