Function mpi::ffi::MPI_Accumulate

pub unsafe extern fn MPI_Accumulate(origin_addr: *const c_void,
                                    origin_count: c_int,
                                    origin_datatype: MPI_Datatype,
                                    target_rank: c_int,
                                    target_disp: MPI_Aint,
                                    target_count: c_int,
                                    target_datatype: MPI_Datatype,
                                    op: MPI_Op,
                                    win: MPI_Win)
                                    -> c_int