mbuf: mbuf_consumed() function

diff --git a/usual/mbuf.h b/usual/mbuf.h
index a8f8644bb90f6c24119fd76c8fe72c189b36cead..56a047d6f1b94d41c9b7940bf39599f82987bb46 100644 (file)
--- a/usual/mbuf.h
+++ b/usual/mbuf.h
@@ -115,6 +115,12 @@ static inline unsigned mbuf_written(const struct MBuf *buf)
        return buf->write_pos;
 }
 
+/** How many bytes have been read from buffer */
+static inline unsigned mbuf_consumed(const struct MBuf *buf)
+{
+       return buf->read_pos;
+}
+
 /** Return pointer to data area. */
 static inline const void *mbuf_data(const struct MBuf *buf)
 {