X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=serialport.c;h=6104f241a17cb34db7638ef00ac9cebaff4529ce;hb=69a3739ca07a87d56e376a02f3bc1f0a0a9b64e7;hp=92156b476471cdf73f3a3efefe05bba69aff6795;hpb=ea34fba89980174892ef239ca752484055297f69;p=libserialport.git

diff --git a/serialport.c b/serialport.c
index 92156b4..6104f24 100644
--- a/serialport.c
+++ b/serialport.c
@@ -535,6 +535,23 @@ enum sp_return sp_flush(struct sp_port *port, enum sp_buffer buffers)
 	return SP_OK;
 }
 
+enum sp_return sp_drain(struct sp_port *port)
+{
+	CHECK_PORT();
+
+#ifdef _WIN32
+	/* Returns non-zero upon success, 0 upon failure. */
+	if (FlushFileBuffers(port->hdl) == 0)
+		return SP_ERR_FAIL;
+#else
+	/* Returns 0 upon success, -1 upon failure. */
+	if (tcdrain(port->fd) < 0)
+		return SP_ERR_FAIL;
+#endif
+
+	return SP_OK;
+}
+
 enum sp_return sp_write(struct sp_port *port, const void *buf, size_t count)
 {
 	CHECK_PORT();