get_index_name_lock
pthread_rwlock_t* get_index_name_lock();
if(pthread_rwlock_rdlock(get_index_name_lock()) == 0){
pthread_rwlock_unlock(get_index_name_lock());
if(pthread_rwlock_rdlock(get_index_name_lock()) == 0){
pthread_rwlock_unlock(get_index_name_lock());