Function cdds_util::ddsrt_avl_citer_first

pub unsafe extern "C" fn ddsrt_avl_citer_first(
    td: *const ddsrt_avl_ctreedef_t, 
    tree: *const ddsrt_avl_ctree_t, 
    iter: *mut ddsrt_avl_citer_t
) -> *mut c_void