Function mpi::ffi::MPI_Fetch_and_op

pub unsafe extern fn MPI_Fetch_and_op(origin_addr: *const c_void,
                                      result_addr: *mut c_void,
                                      datatype: MPI_Datatype,
                                      target_rank: c_int,
                                      target_disp: MPI_Aint,
                                      op: MPI_Op,
                                      win: MPI_Win)
                                      -> c_int