X-Git-Url: https://git.lttng.org/?p=urcu.git;a=blobdiff_plain;f=test_mutex.c;h=e82498070f675ea74330eb2e3d4acf8bddd7cbe5;hp=4cf1d32c29151e54f1aa3dd67461bc4f3e1b8098;hb=6af882baf4a7cc82167b8e1abba5d6c851e0e6e8;hpb=2a7ac59da1436b86d7cb59fb8b5712c7d98c1519

diff --git a/test_mutex.c b/test_mutex.c
index 4cf1d32..e824980 100644
--- a/test_mutex.c
+++ b/test_mutex.c
@@ -98,22 +98,33 @@ static unsigned int cpu_affinities[NR_CPUS];
 static unsigned int next_aff = 0;
 static int use_affinity = 0;
 
+pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
+
 static void set_affinity(void)
 {
 	cpu_set_t mask;
 	int cpu;
+	int ret;
 
 	if (!use_affinity)
 		return;
 
+	ret = pthread_mutex_lock(&affinity_mutex);
+	if (ret) {
+		perror("Error in pthread mutex lock");
+		exit(-1);
+	}
 	cpu = cpu_affinities[next_aff++];
+	ret = pthread_mutex_unlock(&affinity_mutex);
+	if (ret) {
+		perror("Error in pthread mutex unlock");
+		exit(-1);
+	}
 	CPU_ZERO(&mask);
 	CPU_SET(cpu, &mask);
 	sched_setaffinity(0, sizeof(mask), &mask);
 }
 
-
-
 /*
  * returns 0 if test should end.
  */