_thr_rwl_wrlock
_thr_rwl_wrlock(&_thr_atfork_lock);
_thr_rwl_wrlock(&_thr_atfork_lock);
_thr_rwl_wrlock(&_thr_list_lock); \
_thr_rwl_wrlock(&pshared_lock);
_thr_rwl_wrlock(rwlp);
_thr_rwl_wrlock(&usa->lock);
void _thr_rwl_wrlock(struct urwlock *rwlock) __hidden;