tty: implement TCFLSH to flush buffers

This is probably incomplete. Is locking needed? Should we notify the next writer (if any) that the port is writable when flushing the output? Change-Id: I2566e2d036a61af4819894a44f57603179aa27df Reviewed-on: https://review.haiku-os.org/c/haiku/+/2516 Reviewed-by: Adrien Destugues <[email protected]>
2020-09-14 13:35:23 +00:00
parent f0e491d390
commit a52008cb44
4 changed files with 37 additions and 0 deletions
@@ -39,6 +39,7 @@ typedef bool (*tty_service_func)(struct tty *tty, uint32 op, void *buffer,
 #define	TTYSETDTR		6	/* bool dataTerminalReady */
 #define TTYSETRTS		7	/* bool requestToSend */
 #define	TTYGETSIGNALS	8	/* call tty_hardware_signal for all bits */
+#define TTYFLUSH		9	/* clear input and/or output buffers */

 typedef struct tty_module_info tty_module_info;