int nn_sock_term (struct nn_sock *self)
{
int rc;
int i;
/* NOTE: nn_sock_stop must have already been called. */
/* Some endpoints may still be alive. Here we are going to wait
till they are all closed. This loop is not interruptible, because
making it so would leave a partially cleaned up socket, and we don't
have a way to defer resource deallocation. */
for (;;) {
rc = nn_sem_wait (&self->termsem);
if (nn_slow (rc == -EINTR))
continue;
errnum_assert (rc == 0, -rc);
break;
}
/* Also, wait for all holds on the socket to be released. */
for (;;) {
rc = nn_sem_wait (&self->relesem);
if (nn_slow (rc == -EINTR))
continue;
errnum_assert (rc == 0, -rc);
break;
}
/* Threads that posted the semaphore(s) can still have the ctx locked
for a short while. By simply entering the context and exiting it
immediately we can be sure that any such threads have already
exited the context. */
nn_ctx_enter (&self->ctx);
nn_ctx_leave (&self->ctx);
/* At this point, we can be reasonably certain that no other thread
has any references to the socket. */
nn_fsm_stopped_noevent (&self->fsm);
nn_fsm_term (&self->fsm);
nn_sem_term (&self->termsem);
nn_list_term (&self->sdeps);
nn_list_term (&self->eps);
nn_clock_term (&self->clock);
nn_ctx_term (&self->ctx);
/* Destroy any optsets associated with the socket. */
for (i = 0; i != NN_MAX_TRANSPORT; ++i)
if (self->optsets [i])
self->optsets [i]->vfptr->destroy (self->optsets [i]);
return 0;
}
int nn_sock_term (struct nn_sock *self)
{
int rc;
int i;
/* Ask the state machine to start closing the socket. */
nn_ctx_enter (&self->ctx);
nn_fsm_stop (&self->fsm);
nn_ctx_leave (&self->ctx);
/* Shutdown process was already started but some endpoints may still
alive. Here we are going to wait till they are all closed. */
rc = nn_sem_wait (&self->termsem);
if (nn_slow (rc == -EINTR))
return -EINTR;
errnum_assert (rc == 0, -rc);
/* The thread that posted the semaphore can still have the ctx locked
for a short while. By simply entering the context and exiting it
immediately we can be sure that the thread in question have already
exited the context. */
nn_ctx_enter (&self->ctx);
nn_ctx_leave (&self->ctx);
/* Deallocate the resources. */
nn_fsm_stopped_noevent (&self->fsm);
nn_fsm_term (&self->fsm);
nn_sem_term (&self->termsem);
nn_list_term (&self->sdeps);
nn_list_term (&self->eps);
nn_clock_term (&self->clock);
nn_ctx_term (&self->ctx);
/* Destroy any optsets associated with the socket. */
for (i = 0; i != NN_MAX_TRANSPORT; ++i)
if (self->optsets [i])
self->optsets [i]->vfptr->destroy (self->optsets [i]);
return 0;
}