MPI_File_get_type_extent(3)

NAME
     MPI_File_get_type_extent - Returns the extent of datatype in the file

SYNOPSIS
     C:

          #include "mpi.h"

          int MPI_File_get_type_extent(MPI_File fh, MPI_Datatype
          datatype, MPI_Aint *extent)


     Fortran:

          INCLUDE "mpif.h" (or USE MPI)

          INTEGER fh, datatype, ierror
          INTEGER(KIND=MPI_ADDRESS_KIND) extent

          CALL MPI_FILE_GET_TYPE_EXTENT(fh, datatype, extent,
          ierror)


DESCRIPTION
     The MPI_File_get_type_extent routine returns the extent of datatype in
     the fh file. This extent will be the same for all processes accessing the
     fh file.  If the current view uses a user-defined data representation,
     MPI uses the dtype_file_extent_fn callback to calculate the extent.

     In the case of user-defined data representations, the extent of a derived
     datatype can be calculated by first using dtype_file_extent_fn to
     determine the extents of the predefined datatypes in this derived
     datatype.

     The MPI_File_get_type_extent routine accepts the following arguments:

     fh             Specifies the file handle (handle)

     datatype       Specifies the datatype (handle)

     extent         Returns the extent of the datatype (nonnegative integer)

     ierror         Specifies the return code value for successful completion,
                    which is in MPI_SUCCESS.  MPI_SUCCESS is defined in the
                    mpif.h file.

   Notes for Fortran
     All MPI objects (for example, MPI_Datatype, MPI_Comm, MPI_File) are of
     type INTEGER.
SEE ALSO
     MPI_File_open(3), MPI_IO(3)