Make sp_flush take an option for what to flush.

[libserialport.git] / libserialport.h.in

diff --git a/libserialport.h.in b/libserialport.h.in
index fa5ba1a829c95a96be03a84c1ab370972d97b2f0..12e9cba3a5556ae468f1957d4f36e2aff0304b31 100644 (file)
--- a/libserialport.h.in
+++ b/libserialport.h.in
@@ -109,6 +109,16 @@ enum sp_mode {
        SP_MODE_NONBLOCK = 4,
 };
 
+/** Buffer selection. */
+enum sp_buffer {
+       /** Input buffer. */
+       SP_BUF_INPUT = 1,
+       /** Output buffer. */
+       SP_BUF_OUTPUT = 2,
+       /** Both buffers. */
+       SP_BUF_BOTH = 3,
+};
+
 /** Parity settings. */
 enum sp_parity {
        /** Special value to indicate setting should be left alone. */
@@ -506,12 +516,14 @@ enum sp_return sp_read(struct sp_port *port, void *buf, size_t count);
 enum sp_return sp_write(struct sp_port *port, const void *buf, size_t count);
 
 /**
- * Flush serial port buffers.
+ * Flush serial port buffers. Data in the selected buffer(s) is discarded.
+ *
+ * @param buffers Which buffer(s) to flush.
  *
  * @return SP_OK on success, SP_ERR_FAIL on failure, or SP_ERR_ARG
  *         if an invalid port is passed.
  */
-enum sp_return sp_flush(struct sp_port *port);
+enum sp_return sp_flush(struct sp_port *port, enum sp_buffer buffers);
 
 /**
  * @}