Function mpi::ffi::MPI_Dist_graph_neighbors

pub unsafe extern "C" fn MPI_Dist_graph_neighbors(
    comm: *mut ompi_communicator_t,
    maxindegree: i32,
    sources: *mut i32,
    sourceweights: *mut i32,
    maxoutdegree: i32,
    destinations: *mut i32,
    destweights: *mut i32
) -> i32