Function mpi::ffi::MPI_Type_create_keyval

pub unsafe extern fn MPI_Type_create_keyval(type_copy_attr_fn: MPI_Type_copy_attr_function,
                                            type_delete_attr_fn: MPI_Type_delete_attr_function,
                                            type_keyval: *mut c_int,
                                            extra_state: *mut c_void)
                                            -> c_int