pthread_attr_get_np
extern int pthread_attr_get_np(pthread_t, pthread_attr_t *);
VERIFY0(pthread_attr_get_np(pthread_self(), &pgn_attr));
VERIFY0(pthread_attr_get_np(pthread_self(), &pgn_attr));
VERIFY0(pthread_attr_get_np(pthread_self(), &pgn_attr));
VERIFY0(pthread_attr_get_np(thr, &altattr));
VERIFY0(pthread_attr_get_np(pthread_self(), &selfattr));
ret = pthread_attr_get_np(UINT32_MAX, &pgn_attr);