NAME

       MPI_Type_extent  - Returns the extent of a data type, the difference between the upper and
       lower bounds of the data type -- use of this routine is deprecated.

SYNTAX

C Syntax

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

Fortran Syntax

       INCLUDE 'mpif.h'
       MPI_TYPE_EXTENT(DATATYPE, EXTENT, IERROR)
            INTEGER   DATATYPE, EXTENT, IERROR

INPUT PARAMETER

       datatype  Datatype (handle).

OUTPUT PARAMETERS

       extent    Datatype extent (integer).

       IERROR    Fortran only: Error status (integer).

DESCRIPTION

       Note that use of this routine is deprecated as of MPI-2.  Please  use  MPI_Type_get_extent
       instead.

       This deprecated routine is not available in C++.

       MPI_Type_extent  returns  the  extent of a data type, the difference between the upper and
       lower bounds of the data type.

       In general, if

           Typemap = {(type(0), disp(0)), ..., (type(n-1), disp(n-1))}

       then the lower bound of Typemap is defined to be

                     ( min(j) disp(j)                         if no entry has
         lb(Typemap)=(                                        basic type lb
                     (min(j) {disp(j) such that type(j) = lb} otherwise

       Similarly, the upper bound of Typemap is defined to be

                     (max(j) disp(j) + sizeof(type(j)) + e    if no entry has
         ub(Typemap)=(                                        basic type ub
                     (max(j) {disp(j) such that type(j) = ub} otherwise

       Then

           extent(Typemap) = ub(Typemap) - lb(Typemap)

       If type(i) requires alignment to a byte address that is a multiple of k(i), then e is  the
       least nonnegative increment needed to round extent(Typemap) to the next multiple of max(i)
       k(i).

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.

SEE ALSO

       MPI_Type_get_extent