pthread_mutex_unlock(&pdb->event_thread.mutex);
pthread_mutex_destroy(&pdb->event_thread.mutex);
pthread_cond_destroy(&pdb->event_thread.cond);
pthread_mutex_unlock(&pdb->event_thread.mutex);
pthread_mutex_destroy(&pdb->event_thread.mutex);
pthread_cond_destroy(&pdb->event_thread.cond);