int (*readchar) PARAMS ((serial_t, int timeout));
int (*write) PARAMS ((serial_t, const char *str, int len));
int (*flush_output) PARAMS ((serial_t));
+ int (*flush_input) PARAMS ((serial_t));
+ int (*send_break) PARAMS ((serial_t));
void (*go_raw) PARAMS ((serial_t));
serial_ttystate (*get_tty_state) PARAMS ((serial_t));
int (*set_tty_state) PARAMS ((serial_t, serial_ttystate));
#define SERIAL_FDOPEN(FD) serial_fdopen(FD)
-/* Flush pending output. */
+/* Flush pending output. Might also flush input (if this system can't flush
+ only output). */
#define SERIAL_FLUSH_OUTPUT(SERIAL_T) \
((SERIAL_T)->ops->flush_output((SERIAL_T)))
+/* Flush pending input. Might also flush output (if this system can't flush
+ only input). */
+
+#define SERIAL_FLUSH_INPUT(SERIAL_T)\
+ ((*(SERIAL_T)->ops->flush_input) ((SERIAL_T)))
+
+/* Send a break between 0.25 and 0.5 seconds long. */
+
+#define SERIAL_SEND_BREAK(SERIAL_T) \
+ ((*(SERIAL_T)->ops->send_break) (SERIAL_T))
+
/* Turn the port into raw mode. */
#define SERIAL_RAW(SERIAL_T) (SERIAL_T)->ops->go_raw((SERIAL_T))
((*((SERIAL_T)->ops->noflush_set_tty_state)) \
((SERIAL_T), (NEW_TTYSTATE), (OLD_TTYSTATE)))
-/* Read one char from the serial device with TIMEOUT seconds timeout.
- Returns char if ok, else one of the following codes. Note that all
- error codes are guaranteed to be < 0. */
+/* Read one char from the serial device with TIMEOUT seconds to wait
+ or -1 to wait forever. Use timeout of 0 to effect a poll. Returns
+ char if ok, else one of the following codes. Note that all error
+ codes are guaranteed to be < 0. */
#define SERIAL_ERROR -1 /* General error, see errno for details */
#define SERIAL_TIMEOUT -2
#define SERIAL_SETBAUDRATE(SERIAL_T, RATE) ((SERIAL_T)->ops->setbaudrate((SERIAL_T), RATE))
-/* Write LEN chars from STRING to the port SERIAL_T. Returns 0 for success,
- -1 for failure. */
+/* Write LEN chars from STRING to the port SERIAL_T. Returns 0 for
+ success, non-zero for failure. */
#define SERIAL_WRITE(SERIAL_T, STRING, LEN) ((SERIAL_T)->ops->write((SERIAL_T), STRING, LEN))