int nn_stcp_isidle(struct nn_stcp *self)
{
return nn_fsm_isidle(&self->fsm);
}
void nn_usock_accept (struct nn_usock *self, struct nn_usock *listener)
{
int s;
/* Start the actual accepting. */
if (nn_fsm_isidle(&self->fsm)) {
nn_fsm_start (&self->fsm);
nn_fsm_action (&self->fsm, NN_USOCK_ACTION_BEING_ACCEPTED);
}
nn_fsm_action (&listener->fsm, NN_USOCK_ACTION_ACCEPT);
/* Try to accept new connection in synchronous manner. */
#if NN_HAVE_ACCEPT4
s = accept4 (listener->s, NULL, NULL, SOCK_CLOEXEC);
#else
s = accept (listener->s, NULL, NULL);
#endif
//printf("usock.%d -> accept errno.%d s.%d %s\n",self->s,errno,s,nn_strerror(errno));
/* Immediate success. */
if (nn_fast (s >= 0)) {
/* Disassociate the listener socket from the accepted
socket. Is useful if we restart accepting on ACCEPT_ERROR */
listener->asock = NULL;
self->asock = NULL;
nn_usock_init_from_fd (self, s);
nn_fsm_action (&listener->fsm, NN_USOCK_ACTION_DONE);
nn_fsm_action (&self->fsm, NN_USOCK_ACTION_DONE);
return;
}
/* Detect a failure. Note that in ECONNABORTED case we simply ignore
the error and wait for next connection in asynchronous manner. */
errno_assert (errno == EAGAIN || errno == EWOULDBLOCK ||
errno == ECONNABORTED || errno == ENFILE || errno == EMFILE ||
errno == ENOBUFS || errno == ENOMEM);
/* Pair the two sockets. They are already paired in case
previous attempt failed on ACCEPT_ERROR */
nn_assert (!self->asock || self->asock == listener);
self->asock = listener;
nn_assert (!listener->asock || listener->asock == self);
listener->asock = self;
/* Some errors are just ok to ignore for now. We also stop repeating
any errors until next IN_FD event so that we are not in a tight loop
and allow processing other events in the meantime */
if (nn_slow (errno != EAGAIN && errno != EWOULDBLOCK && errno != ECONNABORTED && errno != listener->errnum))
{
PNACL_message("listen errno.%d\n",errno);
listener->errnum = errno;
listener->state = NN_USOCK_STATE_ACCEPTING_ERROR;
nn_fsm_raise (&listener->fsm,
&listener->event_error, NN_USOCK_ACCEPT_ERROR);
return;
}
/* Ask the worker thread to wait for the new connection. */
nn_worker_execute (listener->worker, &listener->task_accept);
}
int nn_slibfabric_isidle (struct nn_slibfabric *self)
{
return nn_fsm_isidle (&self->fsm);
}
int nn_aipc_isidle (struct nn_aipc *self)
{
return nn_fsm_isidle (&self->fsm);
}
int nn_usock_isidle (struct nn_usock *self)
{
return nn_fsm_isidle (&self->fsm);
}
void nn_fsm_start (struct nn_fsm *self)
{
nn_assert (nn_fsm_isidle (self));
self->fn (self, NN_FSM_ACTION, NN_FSM_START, NULL);
self->state = NN_FSM_STATE_ACTIVE;
}
void nn_fsm_term (struct nn_fsm *self)
{
nn_assert (nn_fsm_isidle (self));
nn_fsm_event_term (&self->stopped);
}
int nn_sws_isidle (struct nn_sws *self)
{
return nn_fsm_isidle (&self->fsm);
}
int nn_timer_isidle (struct nn_timer *self)
{
return nn_fsm_isidle (&self->fsm);
}
int nn_streamhdr_isidle (struct nn_streamhdr *self)
{
return nn_fsm_isidle (&self->fsm);
}