/* try to lock the structure before releasing */
if ((ret = pthread_mutex_lock(&pdb->mutex))) {
OVS_ERROR("pthread_mutex_lock() DB mutex lock failed (%d)", ret);
/* try to lock the structure before releasing */
if ((ret = pthread_mutex_lock(&pdb->mutex))) {
OVS_ERROR("pthread_mutex_lock() DB mutex lock failed (%d)", ret);