atfork_head
atfork_head temp_list = TAILQ_HEAD_INITIALIZER(temp_list);
TAILQ_FOREACH_REVERSE(af, &_thr_atfork_list, atfork_head, qe) {
atfork_head _thr_atfork_list = TAILQ_HEAD_INITIALIZER(_thr_atfork_list);
extern atfork_head _thr_atfork_list __hidden;
typedef TAILQ_HEAD(atfork_head, pthread_atfork) atfork_head;