-extern serstatus_t ser_getstatus(struct Serial *port);
-extern void ser_setstatus(struct Serial *port, serstatus_t status);
+/**
+ * \name Additional functions implemented as macros
+ *
+ * \{
+ */
+#define ser_getstatus(h) ((h)->status)
+#define ser_setstatus(h, x) ((h)->status = (x))
+/* \} */