Function mpi::ffi::PMPI_Fetch_and_op

pub unsafe extern "C" fn PMPI_Fetch_and_op(
    origin_addr: *const c_void,
    result_addr: *mut c_void,
    datatype: *mut ompi_datatype_t,
    target_rank: i32,
    target_disp: isize,
    op: *mut ompi_op_t,
    win: *mut ompi_win_t
) -> i32