clang: Add annotations for thread safety check.

This commit adds annotations for thread safety check. And the
check can be conducted by using -Wthread-safety flag in clang.

Co-authored-by: Alex Wang <alexw@nicira.com>
Signed-off-by: Alex Wang <alexw@nicira.com>
Signed-off-by: Ethan Jackson <ethan@nicira.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/lib/uuid.c b/lib/uuid.c
index 7b03fe0b..18748ea9 100644
--- a/lib/uuid.c
+++ b/lib/uuid.c
@@ -81,19 +81,19 @@ uuid_init(void)
 void
 uuid_generate(struct uuid *uuid)
 {
-    static pthread_mutex_t mutex = PTHREAD_ADAPTIVE_MUTEX_INITIALIZER;
+    static struct ovs_mutex mutex = OVS_ADAPTIVE_MUTEX_INITIALIZER;
     uint64_t copy[2];
 
     uuid_init();
 
     /* Copy out the counter's current value, then increment it. */
-    xpthread_mutex_lock(&mutex);
+    ovs_mutex_lock(&mutex);
     copy[0] = counter[0];
     copy[1] = counter[1];
     if (++counter[1] == 0) {
         counter[0]++;
     }
-    xpthread_mutex_unlock(&mutex);
+    ovs_mutex_unlock(&mutex);
 
     /* AES output is exactly 16 bytes, so we encrypt directly into 'uuid'. */
     aes128_encrypt(&key, copy, uuid);