_lwp_unpark_all
ssize_t _lwp_unpark_all(const lwpid_t *, size_t, const void *);
(void)_lwp_unpark_all(lids, nlid, NULL);
(void)_lwp_unpark_all(lids, nlid, NULL);
slen = _lwp_unpark_all(NULL, 0, NULL);
(void)_lwp_unpark_all(lids, nlid, NULL);
(void)_lwp_unpark_all(lids, nlid, NULL);