From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Mon, 5 Sep 2011 00:10:41 +0000 (-0400)
Subject: lfq baseline: check for empty list
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=42eb9ea1d4ea572cfc4749ce2794955d228491a8;p=userspace-rcu.git

lfq baseline: check for empty list

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---

diff --git a/tests/test_lfq_baseline.c b/tests/test_lfq_baseline.c
index 4f0eba2..c35d894 100644
--- a/tests/test_lfq_baseline.c
+++ b/tests/test_lfq_baseline.c
@@ -242,9 +242,12 @@ void *thr_dequeuer(void *_count)
 		struct test *node;
 
 		test_mutex_lock();
-		node = cds_list_first_entry(&q, struct test, node);
-		if (node)
+		if (!cds_list_empty(&q)) {
+			node = cds_list_first_entry(&q, struct test, node);
 			cds_list_del(&node->node);
+		} else {
+			node = NULL;
+		}
 		test_mutex_unlock();
 
 		if (node) {
@@ -273,7 +276,11 @@ void test_end(unsigned long long *nr_dequeues)
 	struct test *node;
 
 	do {
-		node = cds_list_first_entry(&q, struct test, node);
+		if (!cds_list_empty(&q)) {
+			node = cds_list_first_entry(&q, struct test, node);
+		} else {
+			node = NULL;
+		}
 		if (node) {
 			cds_list_del(&node->node);
 			free(node);	/* no more concurrent access */