Function mpi::ffi::PMPI_Win_create_keyval

pub unsafe extern fn PMPI_Win_create_keyval(win_copy_attr_fn: MPI_Win_copy_attr_function,
                                            win_delete_attr_fn: MPI_Win_delete_attr_function,
                                            win_keyval: *mut c_int,
                                            extra_state: *mut c_void)
                                            -> c_int