kqueue(void)
{
struct kqueue *kq;
int tmp;
kq = calloc(1, sizeof(*kq));
if (kq == NULL)
return (-1);
kq->kq_ref = 1;
pthread_mutex_init(&kq->kq_mtx, NULL);
#ifdef NDEBUG
KQUEUE_DEBUG = 0;
#else
KQUEUE_DEBUG = (getenv("KQUEUE_DEBUG") == NULL) ? 0 : 1;
#endif
if (socketpair(AF_UNIX, SOCK_STREAM, 0, kq->kq_sockfd) < 0)
goto errout_unlocked;
if (kqueue_sys_init(kq) < 0)
goto errout_unlocked;
pthread_rwlock_wrlock(&kqtree_mtx);
if (kqueue_gc() < 0)
goto errout;
/* TODO: move outside of the lock if it is safe */
if (filter_register_all(kq) < 0)
goto errout;
RB_INSERT(kqt, &kqtree, kq);
pthread_rwlock_unlock(&kqtree_mtx);
dbg_printf("created kqueue, fd=%d", kq->kq_sockfd[1]);
return (kq->kq_sockfd[1]);
errout:
pthread_rwlock_unlock(&kqtree_mtx);
errout_unlocked:
if (kq->kq_sockfd[0] != kq->kq_sockfd[1]) {
tmp = errno;
(void)close(kq->kq_sockfd[0]);
(void)close(kq->kq_sockfd[1]);
errno = tmp;
}
#if defined(__sun__)
if (kq->kq_port > 0)
close(kq->kq_port);
#endif
free(kq);
return (-1);
}
int
linux_kqueue_init(struct kqueue *kq)
{
kq->kq_id = epoll_create(1);
if (kq->kq_id < 0) {
dbg_perror("epoll_create(2)");
return (-1);
}
if (filter_register_all(kq) < 0) {
close(kq->kq_id);
return (-1);
}
#if DEADWOOD
//might be useful in posix
/* Add each filter's pollable descriptor to the epollset */
for (i = 0; i < EVFILT_SYSCOUNT; i++) {
filt = &kq->kq_filt[i];
if (filt->kf_id == 0)
continue;
memset(&ev, 0, sizeof(ev));
ev.events = EPOLLIN;
ev.data.ptr = filt;
if (epoll_ctl(kq->kq_id, EPOLL_CTL_ADD, filt->kf_pfd, &ev) < 0) {
dbg_perror("epoll_ctl(2)");
close(kq->kq_id);
return (-1);
}
}
#endif
return (0);
}
