MPI_Type_get_extent(3)             Open MPI             MPI_Type_get_extent(3)



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.





1.4.1                            Jan 14, 2010           MPI_Type_get_extent(3)
