static void *
vwe_thread(void *priv)
{
struct epoll_event ev[NEEV], *ep;
struct sess *sp;
char junk;
double now, deadline;
int dotimer, i, n;
struct vwe *vwe;
CAST_OBJ_NOTNULL(vwe, priv, VWE_MAGIC);
THR_SetName("cache-epoll");
vwe->epfd = epoll_create(1);
assert(vwe->epfd >= 0);
vwe_modadd(vwe, vwe->pipes[0], vwe->pipes, EPOLL_CTL_ADD);
vwe_modadd(vwe, vwe->timer_pipes[0], vwe->timer_pipes, EPOLL_CTL_ADD);
while (1) {
dotimer = 0;
n = epoll_wait(vwe->epfd, ev, NEEV, -1);
now = VTIM_real();
for (ep = ev, i = 0; i < n; i++, ep++) {
if (ep->data.ptr == vwe->timer_pipes &&
(ep->events == EPOLLIN || ep->events == EPOLLPRI))
{
assert(read(vwe->timer_pipes[0], &junk, 1));
dotimer = 1;
} else
vwe_eev(vwe, ep, now);
}
if (!dotimer)
continue;
/* check for timeouts */
deadline = now - cache_param->timeout_idle;
for (;;) {
sp = VTAILQ_FIRST(&vwe->sesshead);
if (sp == NULL)
break;
if (sp->t_idle > deadline)
break;
VTAILQ_REMOVE(&vwe->sesshead, sp, list);
// XXX: not yet VTCP_linger(sp->fd, 0);
SES_Delete(sp, SC_RX_TIMEOUT, now);
}
}
return (NULL);
}
static void
vwe_eev(struct vwe *vwe, const struct epoll_event *ep)
{
struct sess *ss[NEEV], *sp;
int i, j;
AN(ep->data.ptr);
if (ep->data.ptr == vwe->pipes) {
if (ep->events & EPOLLIN || ep->events & EPOLLPRI) {
j = 0;
i = read(vwe->pipes[0], ss, sizeof ss);
if (i == -1 && errno == EAGAIN)
return;
while (i >= sizeof ss[0]) {
CHECK_OBJ_NOTNULL(ss[j], SESS_MAGIC);
assert(ss[j]->fd >= 0);
AZ(ss[j]->obj);
VTAILQ_INSERT_TAIL(&vwe->sesshead, ss[j], list);
vwe_cond_modadd(vwe, ss[j]->fd, ss[j]);
j++;
i -= sizeof ss[0];
}
assert(i == 0);
}
} else {
CAST_OBJ_NOTNULL(sp, ep->data.ptr, SESS_MAGIC);
if (ep->events & EPOLLIN || ep->events & EPOLLPRI) {
i = HTC_Rx(sp->htc);
if (i == 0) {
vwe_modadd(vwe, sp->fd, sp, EPOLL_CTL_MOD);
return; /* more needed */
}
VTAILQ_REMOVE(&vwe->sesshead, sp, list);
SES_Handle(sp, i);
} else if (ep->events & EPOLLERR) {
VTAILQ_REMOVE(&vwe->sesshead, sp, list);
SES_Delete(sp, "ERR");
} else if (ep->events & EPOLLHUP) {
VTAILQ_REMOVE(&vwe->sesshead, sp, list);
SES_Delete(sp, "HUP");
} else if (ep->events & EPOLLRDHUP) {
VTAILQ_REMOVE(&vwe->sesshead, sp, list);
SES_Delete(sp, "RHUP");
}
}
}