int
zloop_start (zloop_t *self)
{
assert (self);
int rc = 0;
// Recalculate all timers now
s_timer_t *timer = (s_timer_t *) zlist_first (self->timers);
while (timer) {
timer->when = timer->delay + zclock_time ();
timer = (s_timer_t *) zlist_next (self->timers);
}
// Main reactor loop
while (!zctx_interrupted) {
if (self->need_rebuild) {
// If s_rebuild_pollset() fails, break out of the loop and
// return its error
rc = s_rebuild_pollset (self);
if (rc)
break;
}
rc = zmq_poll (self->pollset, (int) self->poll_size,
s_tickless_timer (self) * ZMQ_POLL_MSEC);
if (rc == -1 || zctx_interrupted) {
if (self->verbose)
zclock_log ("I: zloop: interrupted (%d) - %s", rc,
zmq_strerror (zmq_errno ()));
rc = 0;
break; // Context has been shut down
}
// Handle any timers that have now expired
timer = (s_timer_t *) zlist_first (self->timers);
while (timer) {
if (zclock_time () >= timer->when && timer->when != -1) {
if (self->verbose)
zclock_log ("I: zloop: call timer id=%d handler", timer->timer_id);
rc = timer->handler (self, timer->timer_id, timer->arg);
if (rc == -1)
break; // Timer handler signaled break
if (timer->times && --timer->times == 0) {
zlist_remove (self->timers, timer);
free (timer);
}
else
timer->when = timer->delay + zclock_time ();
}
timer = (s_timer_t *) zlist_next (self->timers);
}
// Handle any pollers that are ready
size_t item_nbr;
for (item_nbr = 0; item_nbr < self->poll_size && rc >= 0; item_nbr++) {
s_poller_t *poller = &self->pollact [item_nbr];
assert (self->pollset [item_nbr].socket == poller->item.socket);
if ((self->pollset [item_nbr].revents & ZMQ_POLLERR)
&& !poller->tolerant) {
if (self->verbose)
zclock_log ("W: zloop: can't poll %s socket (%p, %d): %s",
poller->item.socket?
zsocket_type_str (poller->item.socket): "FD",
poller->item.socket, poller->item.fd,
zmq_strerror (zmq_errno ()));
// Give handler one chance to handle error, then kill
// poller because it'll disrupt the reactor otherwise.
if (poller->errors++) {
zloop_poller_end (self, &poller->item);
self->pollset [item_nbr].revents = 0;
}
}
else
poller->errors = 0; // A non-error happened
if (self->pollset [item_nbr].revents) {
if (self->verbose)
zclock_log ("I: zloop: call %s socket handler (%p, %d)",
poller->item.socket?
zsocket_type_str (poller->item.socket): "FD",
poller->item.socket, poller->item.fd);
rc = poller->handler (self, &self->pollset [item_nbr], poller->arg);
if (rc == -1 || self->need_rebuild)
break;
}
}
// Now handle any timer zombies
// This is going to be slow if we have many timers; we might use
// a faster lookup on the timer list.
while (zlist_size (self->zombies)) {
// This hack lets us convert our pointer back into an integer timer_id
int timer_id = (byte *) zlist_pop (self->zombies) - (byte *) NULL;
timer = (s_timer_t *) zlist_first (self->timers);
while (timer) {
if (timer->timer_id == timer_id) {
zlist_remove (self->timers, timer);
free (timer);
}
timer = (s_timer_t *) zlist_next (self->timers);
}
}
if (rc == -1)
break;
}
return rc;
}
int
zloop_start (zloop_t *self)
{
assert (self);
int rc = 0;
// Main reactor loop
while (!zsys_interrupted) {
if (self->need_rebuild) {
// If s_rebuild_pollset() fails, break out of the loop and
// return its error
rc = s_rebuild_pollset (self);
if (rc)
break;
}
rc = zmq_poll (self->pollset, (int) self->poll_size, s_tickless (self));
if (rc == -1 || zsys_interrupted) {
if (self->verbose)
zsys_debug ("zloop: interrupted");
rc = 0;
break; // Context has been shut down
}
// Handle any timers that have now expired
int64_t time_now = zclock_mono ();
s_timer_t *timer = (s_timer_t *) zlistx_first (self->timers);
while (timer) {
if (time_now >= timer->when) {
if (self->verbose)
zsys_debug ("zloop: call timer handler id=%d", timer->timer_id);
rc = timer->handler (self, timer->timer_id, timer->arg);
if (rc == -1)
break; // Timer handler signaled break
if (timer->times && --timer->times == 0)
zlistx_delete (self->timers, timer->list_handle);
else
timer->when += timer->delay;
}
timer = (s_timer_t *) zlistx_next (self->timers);
}
// Handle any tickets that have now expired
s_ticket_t *ticket = (s_ticket_t *) zlistx_first (self->tickets);
while (ticket && time_now >= ticket->when) {
if (self->verbose)
zsys_debug ("zloop: call ticket handler");
rc = ticket->handler (self, 0, ticket->arg);
if (rc == -1)
break; // Timer handler signaled break
zlistx_delete (self->tickets, ticket->list_handle);
ticket = (s_ticket_t *) zlistx_next (self->tickets);
}
// Handle any readers and pollers that are ready
size_t item_nbr;
for (item_nbr = 0; item_nbr < self->poll_size && rc >= 0; item_nbr++) {
s_reader_t *reader = &self->readact [item_nbr];
if (reader->handler) {
if ((self->pollset [item_nbr].revents & ZMQ_POLLERR)
&& !reader->tolerant) {
if (self->verbose)
zsys_warning ("zloop: can't read %s socket: %s",
zsock_type_str (reader->sock),
zmq_strerror (zmq_errno ()));
// Give handler one chance to handle error, then kill
// reader because it'll disrupt the reactor otherwise.
if (reader->errors++) {
zloop_reader_end (self, reader->sock);
self->pollset [item_nbr].revents = 0;
}
}
else
reader->errors = 0; // A non-error happened
if (self->pollset [item_nbr].revents) {
if (self->verbose)
zsys_debug ("zloop: call %s socket handler",
zsock_type_str (reader->sock));
rc = reader->handler (self, reader->sock, reader->arg);
if (rc == -1 || self->need_rebuild)
break;
}
}
else {
s_poller_t *poller = &self->pollact [item_nbr];
assert (self->pollset [item_nbr].socket == poller->item.socket);
if ((self->pollset [item_nbr].revents & ZMQ_POLLERR)
&& !poller->tolerant) {
if (self->verbose)
zsys_warning ("zloop: can't poll %s socket (%p, %d): %s",
poller->item.socket ?
zsys_sockname (zsock_type (poller->item.socket)) : "FD",
poller->item.socket, poller->item.fd,
zmq_strerror (zmq_errno ()));
// Give handler one chance to handle error, then kill
// poller because it'll disrupt the reactor otherwise.
if (poller->errors++) {
zloop_poller_end (self, &poller->item);
self->pollset [item_nbr].revents = 0;
}
}
else
poller->errors = 0; // A non-error happened
if (self->pollset [item_nbr].revents) {
if (self->verbose)
zsys_debug ("zloop: call %s socket handler (%p, %d)",
poller->item.socket ?
zsys_sockname (zsock_type (poller->item.socket)) : "FD",
poller->item.socket, poller->item.fd);
rc = poller->handler (self, &self->pollset [item_nbr], poller->arg);
if (rc == -1 || self->need_rebuild)
break;
}
}
}
// Now handle any timer zombies
// This is going to be slow if we have many timers; we might use
// a faster lookup on the timer list.
while (zlistx_first (self->zombies)) {
// Get timer_id back from pointer
int timer_id = (byte *) zlistx_detach (self->zombies, NULL) - (byte *) NULL;
s_timer_remove (self, timer_id);
}
if (rc == -1)
break;
}
self->terminated = true;
return rc;
}
int
zloop_start (zloop_t *self)
{
assert (self);
int rc = 0;
// Recalculate all timers now
s_timer_t *timer = (s_timer_t *) zlist_first (self->timers);
while (timer) {
timer->when = timer->delay + zclock_time ();
timer = (s_timer_t *) zlist_next (self->timers);
}
// Main reactor loop
while (!zctx_interrupted) {
if (self->dirty) {
// If s_rebuild_pollset() fails, break out of the loop and
// return its error
rc = s_rebuild_pollset (self);
if (rc)
break;
}
rc = zmq_poll (self->pollset, (int) self->poll_size,
s_tickless_timer (self) * ZMQ_POLL_MSEC);
if (rc == -1 || zctx_interrupted) {
if (self->verbose)
zclock_log ("I: zloop: interrupted (%d) - %s", rc,
zmq_strerror (zmq_errno ()));
rc = 0;
break; // Context has been shut down
}
// Handle any timers that have now expired
timer = (s_timer_t *) zlist_first (self->timers);
while (timer) {
if (zclock_time () >= timer->when && timer->when != -1) {
if (self->verbose)
zclock_log ("I: zloop: call timer handler");
rc = timer->handler (self, NULL, timer->arg);
if (rc == -1)
break; // Timer handler signaled break
if (timer->times && --timer->times == 0) {
zlist_remove (self->timers, timer);
free (timer);
}
else
timer->when = timer->delay + zclock_time ();
}
timer = (s_timer_t *) zlist_next (self->timers);
}
// Handle any pollers that are ready
size_t item_nbr;
for (item_nbr = 0; item_nbr < self->poll_size && rc >= 0; item_nbr++) {
s_poller_t *poller = &self->pollact [item_nbr];
assert (self->pollset [item_nbr].socket == poller->item.socket);
if ((self->pollset [item_nbr].revents & ZMQ_POLLERR)
&& !poller->ignore_errors) {
if (self->verbose)
zclock_log ("I: zloop: can't poll %s socket (%p, %d): %s",
poller->item.socket?
zsocket_type_str (poller->item.socket): "FD",
poller->item.socket, poller->item.fd,
zmq_strerror (zmq_errno ()));
// Give handler one chance to handle error, then kill
// poller because it'll disrupt the reactor otherwise.
if (poller->errors++) {
zloop_poller_end (self, &poller->item);
self->pollset [item_nbr].revents = 0;
}
}
else
poller->errors = 0; // A non-error happened
if (self->pollset [item_nbr].revents) {
if (self->verbose)
zclock_log ("I: zloop: call %s socket handler (%p, %d)",
poller->item.socket?
zsocket_type_str (poller->item.socket): "FD",
poller->item.socket, poller->item.fd);
rc = poller->handler (self, &self->pollset [item_nbr], poller->arg);
if (rc == -1)
break; // Poller handler signaled break
// If the poller handler calls zloop_poller_end on poller other than itself
// we need to force rebuild in order to avoid reading from freed memory in the handler
if (self->dirty) {
if (self->verbose)
zclock_log ("I: zloop: pollers canceled, forcing rebuild");
break;
}
}
}
// Now handle any timer zombies
// This is going to be slow if we have many zombies
while (zlist_size (self->zombies)) {
void *arg = zlist_pop (self->zombies);
timer = (s_timer_t *) zlist_first (self->timers);
while (timer) {
if (timer->arg == arg) {
zlist_remove (self->timers, timer);
free (timer);
}
timer = (s_timer_t *) zlist_next (self->timers);
}
}
if (rc == -1)
break;
}
return rc;
}