-int iread PARAMS ((int, char *, int));
-int iwrite PARAMS ((int, char *, int));
+typedef int (*fd_reader_t) PARAMS ((int, char *, int, void *));
+typedef int (*fd_writer_t) PARAMS ((int, char *, int, void *));
+typedef int (*fd_poller_t) PARAMS ((int, double, int, void *));
+typedef int (*fd_peeker_t) PARAMS ((int, char *, int, void *));
+typedef void (*fd_closer_t) PARAMS ((int, void *));
+void fd_register_transport PARAMS ((int, fd_reader_t, fd_writer_t,
+ fd_poller_t, fd_peeker_t, fd_closer_t,
+ void *));