--- libelwix/src/ring.c	2026/02/10 15:49:08	1.4.4.1
+++ libelwix/src/ring.c	2026/02/10 17:24:39	1.4.4.2
@@ -3,7 +3,7 @@
 *  by Michael Pounov <misho@elwix.org>
 *
 * $Author: misho $
-* $Id: ring.c,v 1.4.4.1 2026/02/10 15:49:08 misho Exp $
+* $Id: ring.c,v 1.4.4.2 2026/02/10 17:24:39 misho Exp $
 *
 **************************************************************************
 The ELWIX and AITNET software is distributed under the following
@@ -298,8 +298,9 @@ lrb_isempty(lrbuf_t *lrb)
 	if (!lrb)
 		return -1;
 
-	return (atomic_load_explicit((atomic_int*) &lrb->lrb_head, memory_order_acquire) ==
-		atomic_load_explicit((atomic_int*) &lrb->lrb_tail, memory_order_acquire));
+	return (!atomic_load_explicit((atomic_int*) &lrb->lrb_full, memory_order_acquire) &&
+			(atomic_load_explicit((atomic_int*) &lrb->lrb_head, memory_order_acquire) ==
+			atomic_load_explicit((atomic_int*) &lrb->lrb_tail, memory_order_acquire)));
 }
 
 /*
@@ -318,6 +319,9 @@ lrb_isfull(lrbuf_t *lrb)
 	if (!lrb->lrb_size)
 		return 1;
 
+	if (!atomic_load_explicit((atomic_int*) &lrb->lrb_full, memory_order_acquire))
+		return 0;
+
 	t = atomic_load_explicit((atomic_int*) &lrb->lrb_tail, memory_order_acquire);
 	h = atomic_load_explicit((atomic_int*) &lrb->lrb_head, memory_order_relaxed) + 1;
 	if (h >= lrb->lrb_size)
@@ -370,7 +374,8 @@ lrb_enqueue(lrbuf_t *lrb, void *data, size_t len, int 
 		n = len - n;
 	}
 
-	atomic_store_explicit((atomic_int*) &lrb->lrb_head, n, memory_order_release);
+	h = n;
+	atomic_store_explicit((atomic_int*) &lrb->lrb_head, h, memory_order_release);
 	if (drop > 0)
 		while (42) {
 			n = t;
@@ -380,6 +385,9 @@ lrb_enqueue(lrbuf_t *lrb, void *data, size_t len, int 
 			t = n;
 			t2 = (t + drop) % lrb->lrb_size;
 		}
+	else
+		t2 = atomic_load_explicit((atomic_int*) &lrb->lrb_tail, memory_order_acquire);
+	atomic_store_explicit((atomic_int*) &lrb->lrb_full, (h == t2), memory_order_release);
 	return 0;
 }
 
@@ -430,8 +438,10 @@ lrb_dequeue(lrbuf_t *lrb, void *data, size_t len)
 
 		n = t;
 		if (atomic_compare_exchange_weak_explicit((atomic_int*) &lrb->lrb_tail,
-					&n, t2, memory_order_release, memory_order_relaxed))
+					&n, t2, memory_order_release, memory_order_relaxed)) {
+			atomic_store_explicit((atomic_int*) &lrb->lrb_full, 0, memory_order_release);
 			return l;
+		}
 	}
 
 	return 0;