--- libelwix/src/ring.c	2025/09/26 08:58:05	1.1.2.1
+++ libelwix/src/ring.c	2025/09/26 10:13:57	1.1.2.4
@@ -3,7 +3,7 @@
 *  by Michael Pounov <misho@elwix.org>
 *
 * $Author: misho $
-* $Id: ring.c,v 1.1.2.1 2025/09/26 08:58:05 misho Exp $
+* $Id: ring.c,v 1.1.2.4 2025/09/26 10:13:57 misho Exp $
 *
 **************************************************************************
 The ELWIX and AITNET software is distributed under the following
@@ -140,6 +140,8 @@ rbuf_isfull(ringbuf_t *rbuf)
 {
 	if (!rbuf)
 		return -1;
+	if (!rbuf->rb_bufnum)
+		return 1;
 
 	return (((atomic_load_explicit(&rbuf->rb_head, memory_order_relaxed) + 1) % rbuf->rb_bufnum) ==
 		atomic_load_explicit(&rbuf->rb_tail, memory_order_acquire));
@@ -159,8 +161,10 @@ rbuf_enqueue(ringbuf_t *rbuf, void *data, size_t len)
 	int h, t, n;
 	struct iovec *iov;
 
-	if (!rbuf)
+	if (!rbuf || !rbuf->rb_buffer)
 		return -1;
+	if (!rbuf->rb_bufnum)
+		return 1;
 
 	h = atomic_load_explicit(&rbuf->rb_head, memory_order_relaxed);
 	t = atomic_load_explicit(&rbuf->rb_tail, memory_order_acquire);
@@ -189,8 +193,10 @@ rbuf_dequeue(ringbuf_t *rbuf, struct iovec *out)
 {
 	int h, t, n;
 
-	if (!rbuf)
+	if (!rbuf || !rbuf->rb_buffer)
 		return -1;
+	if (!rbuf->rb_bufnum)
+		return 1;
 
 	h = atomic_load_explicit(&rbuf->rb_head, memory_order_acquire);
 	t = atomic_load_explicit(&rbuf->rb_tail, memory_order_relaxed);
@@ -200,7 +206,7 @@ rbuf_dequeue(ringbuf_t *rbuf, struct iovec *out)
 		return 1;
 
 	if (out)
-		out = rbuf->rb_buffer + t;
+		*out = rbuf->rb_buffer[t];
 
 	atomic_store_explicit(&rbuf->rb_tail, n, memory_order_release);
 	return 0;