NAME

       MPI_Type_get_extent - Returns the lower bound and extent of a data type.

SYNTAX

C Syntax

       #include <mpi.h>
       int MPI_Type_get_extent(MPI_Datatype datatype, MPI_Aint *lb,
            MPI_Aint *extent)

Fortran Syntax (see FORTRAN 77 NOTES)

       INCLUDE 'mpif.h'
       MPI_TYPE_GET_EXTENT(DATATYPE, LB, EXTENT, IERROR)
            INTEGER   DATATYPE, IERROR
            INTEGER(KIND=MPI_ADDRESS_KIND) LB, EXTENT

C++ Syntax

       #include <mpi.h>
       void MPI::Datatype::Get_extent(MPI::Aint& lb, MPI::Aint& extent)
            const

INPUT PARAMETER

       datatype  Data type (handle).

OUTPUT PARAMETERS

       lb        Lower bound of data type (integer).

       extent    Data type extent (integer).

       IERROR    Fortran only: Error status (integer).

DESCRIPTION

       MPI_Type_get_extent returns the lower bound and the extent of datatype.

NOTE

       Use  of  MPI_Type_get_extent  is  strongly  recommended  over the old MPI-1 functions MPI_Type_extent and
       MPI_Type_lb.

FORTRAN 77 NOTES

       The MPI standard prescribes portable Fortran syntax for the LB and EXTENT arguments only for Fortran  90.
       FORTRAN 77 users may use the non-portable syntax

            INTEGER*MPI_ADDRESS_KIND LB
       or
            INTEGER*MPI_ADDRESS_KIND EXTENT

       where  MPI_ADDRESS_KIND  is  a constant defined in mpif.h and gives the length of the declared integer in
       bytes.

ERRORS

       Almost all MPI routines return an error value; C routines as  the  value  of  the  function  and  Fortran
       routines in the last argument. C++ functions do not return errors. If the default error handler is set to
       MPI::ERRORS_THROW_EXCEPTIONS, then on error the  C++  exception  mechanism  will  be  used  to  throw  an
       MPI:Exception object.

       Before  the  error  value  is  returned,  the current MPI error handler is called. By default, this error
       handler aborts the MPI job, except for I/O function  errors.  The  error  handler  may  be  changed  with
       MPI_Comm_set_errhandler; 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.