erlang_nif_sys::erlang_nif_sys_api
pub unsafe extern "C" fn enif_get_list_cell( env: *mut ErlNifEnv, term: ERL_NIF_TERM, head: *mut ERL_NIF_TERM, tail: *mut ERL_NIF_TERM) -> c_int
See enif_get_list_cell in the Erlang docs.