--- libelwix/inc/elwix/aring.h	2026/02/18 01:23:04	1.7.2.1
+++ libelwix/inc/elwix/aring.h	2026/02/18 11:41:47	1.9
@@ -3,7 +3,7 @@
 *  by Michael Pounov <misho@elwix.org>
 *
 * $Author: misho $
-* $Id: aring.h,v 1.7.2.1 2026/02/18 01:23:04 misho Exp $
+* $Id: aring.h,v 1.9 2026/02/18 11:41:47 misho Exp $
 *
 **************************************************************************
 The ELWIX and AITNET software is distributed under the following
@@ -51,6 +51,7 @@ SUCH DAMAGE.
 typedef struct {
 	E_ATOMIC_ALIGN	int		rb_head;
 	E_ATOMIC_ALIGN	int		rb_tail;
+	E_ATOMIC_ALIGN	unsigned int	rb_full;
 			int		rb_bufnum;
 			struct iovec	*rb_buffer;
 } ringbuf_t;
@@ -68,7 +69,8 @@ typedef struct {
 					_t = atomic_load_explicit((atomic_int*) &(x)->rb_tail, memory_order_acquire); \
 					_h = atomic_load_explicit((atomic_int*) &(x)->rb_head, memory_order_relaxed); \
 					if (_h == _t) \
-						(r) = 0; \
+						(r) = atomic_load_explicit((atomic_int*) &(x)->rb_full, memory_order_acquire) ? \
+							(x)->rb_bufnum : 0; \
 					else \
 						(r) = (_h + (x)->rb_bufnum - _t) % (x)->rb_bufnum; \
 				} while (0)
@@ -155,9 +157,10 @@ int rbuf_isfull(ringbuf_t *rbuf);
  * @rbuf = Ring buffer
  * @data = Data
  * @len = Length
+ * @lost = Permit to lost data
  * return: -1 error, 1 can't add data, buffer is full or 0 ok
  */
-int rbuf_enqueue(ringbuf_t *rbuf, void *data, size_t len);
+int rbuf_enqueue(ringbuf_t *rbuf, void *data, size_t len, int lost);
 /*
  * rbuf_dequeue() - Dequeue data from buffer
  *