static void nn_req_handler (struct nn_fsm *self, int src, int type,
void *srcptr)
{
struct nn_req *req;
req = nn_cont (self, struct nn_req, fsm);
/******************************************************************************/
/* STOP procedure. */
/******************************************************************************/
if (nn_slow (src == NN_FSM_ACTION && type == NN_FSM_STOP)) {
nn_timer_stop (&req->timer);
req->state = NN_REQ_STATE_STOPPING;
}
if (nn_slow (req->state == NN_REQ_STATE_STOPPING)) {
if (!nn_timer_isidle (&req->timer))
return;
req->state = NN_REQ_STATE_IDLE;
nn_fsm_stopped_noevent (&req->fsm);
nn_sockbase_stopped (&req->xreq.sockbase);
return;
}
switch (req->state) {
/******************************************************************************/
/* IDLE state. */
/* The socket was created recently. Intermediate state. */
/* Pass straight to the PASSIVE state. */
/******************************************************************************/
case NN_REQ_STATE_IDLE:
switch (src) {
case NN_FSM_ACTION:
switch (type) {
case NN_FSM_START:
req->state = NN_REQ_STATE_PASSIVE;
return;
default:
nn_assert (0);
}
default:
nn_assert (0);
}
/******************************************************************************/
/* PASSIVE state. */
/* No request is submitted. */
/******************************************************************************/
case NN_REQ_STATE_PASSIVE:
switch (src) {
case NN_FSM_ACTION:
switch (type) {
case NN_REQ_ACTION_SENT:
nn_req_action_send (req);
return;
default:
nn_assert (0);
}
default:
nn_assert (0);
}
/******************************************************************************/
/* DELAYED state. */
/* Request was submitted but it could not be sent to the network because */
/* there was no peer available at the moment. Now we are waiting for the */
/* peer to arrive to send the request to it. */
/******************************************************************************/
case NN_REQ_STATE_DELAYED:
switch (src) {
case NN_FSM_ACTION:
switch (type) {
case NN_REQ_ACTION_OUT:
nn_req_action_send (req);
return;
case NN_REQ_ACTION_SENT:
/* New request was sent while the old one was still being
processed. Cancel the old request first. */
nn_timer_stop (&req->timer);
req->state = NN_REQ_STATE_CANCELLING;
return;
default:
nn_assert (0);
}
default:
nn_assert (0);
}
/******************************************************************************/
/* ACTIVE state. */
/* Request was submitted. Waiting for reply. */
/******************************************************************************/
case NN_REQ_STATE_ACTIVE:
switch (src) {
case NN_FSM_ACTION:
switch (type) {
case NN_REQ_ACTION_IN:
/* Reply arrived. */
nn_timer_stop (&req->timer);
req->state = NN_REQ_STATE_STOPPING_TIMER;
return;
case NN_REQ_ACTION_SENT:
/* New request was sent while the old one was still being
processed. Cancel the old request first. */
nn_timer_stop (&req->timer);
req->state = NN_REQ_STATE_CANCELLING;
return;
default:
nn_assert (0);
}
case NN_REQ_SRC_RESEND_TIMER:
switch (type) {
case NN_TIMER_TIMEOUT:
nn_timer_stop (&req->timer);
req->state = NN_REQ_STATE_TIMED_OUT;
return;
default:
nn_assert (0);
}
default:
nn_assert (0);
}
/******************************************************************************/
/* TIMED_OUT state. */
/* Waiting for reply has timer out. Stopping the timer. Afterwards, we'll */
/* re-send the request. */
/******************************************************************************/
case NN_REQ_STATE_TIMED_OUT:
switch (src) {
case NN_REQ_SRC_RESEND_TIMER:
switch (type) {
case NN_TIMER_STOPPED:
nn_req_action_send (req);
return;
default:
nn_assert (0);
}
case NN_FSM_ACTION:
switch (type) {
case NN_REQ_ACTION_SENT:
req->state = NN_REQ_STATE_CANCELLING;
return;
default:
nn_assert (0);
}
default:
nn_assert (0);
}
/******************************************************************************/
/* CANCELLING state. */
/* Request was canceled. Waiting till the timer is stopped. */
/******************************************************************************/
case NN_REQ_STATE_CANCELLING:
switch (src) {
case NN_REQ_SRC_RESEND_TIMER:
switch (type) {
case NN_TIMER_STOPPED:
nn_req_action_send (req);
return;
default:
nn_assert (0);
}
case NN_FSM_ACTION:
switch (type) {
case NN_REQ_ACTION_SENT:
return;
default:
nn_assert (0);
}
default:
nn_assert (0);
}
/******************************************************************************/
/* STOPPING_TIMER state. */
/* Reply was delivered. Waiting till the timer is stopped. */
/******************************************************************************/
case NN_REQ_STATE_STOPPING_TIMER:
switch (src) {
case NN_REQ_SRC_RESEND_TIMER:
switch (type) {
case NN_TIMER_STOPPED:
req->state = NN_REQ_STATE_DONE;
return;
default:
nn_assert (0);
}
case NN_FSM_ACTION:
switch (type) {
case NN_REQ_ACTION_SENT:
req->state = NN_REQ_STATE_CANCELLING;
return;
default:
nn_assert (0);
}
default:
nn_assert (0);
}
/******************************************************************************/
/* DONE state. */
/* Reply was received but not yet retrieved by the user. */
/******************************************************************************/
case NN_REQ_STATE_DONE:
switch (src) {
case NN_FSM_ACTION:
switch (type) {
case NN_REQ_ACTION_RECEIVED:
req->state = NN_REQ_STATE_PASSIVE;
return;
case NN_REQ_ACTION_SENT:
nn_req_action_send (req);
return;
default:
nn_assert (0);
}
default:
nn_assert (0);
}
/******************************************************************************/
/* Invalid state. */
/******************************************************************************/
default:
nn_assert (0);
}
}
void nn_req_handler (struct nn_fsm *self, int src, int type,
NN_UNUSED void *srcptr)
{
struct nn_req *req;
req = nn_cont (self, struct nn_req, fsm);
switch (req->state) {
/******************************************************************************/
/* IDLE state. */
/* The socket was created recently. Intermediate state. */
/* Pass straight to the PASSIVE state. */
/******************************************************************************/
case NN_REQ_STATE_IDLE:
switch (src) {
case NN_FSM_ACTION:
switch (type) {
case NN_FSM_START:
req->state = NN_REQ_STATE_PASSIVE;
return;
default:
nn_fsm_bad_action (req->state, src, type);
}
default:
nn_fsm_bad_source (req->state, src, type);
}
/******************************************************************************/
/* PASSIVE state. */
/* No request is submitted. */
/******************************************************************************/
case NN_REQ_STATE_PASSIVE:
switch (src) {
case NN_FSM_ACTION:
switch (type) {
case NN_REQ_ACTION_SENT:
nn_req_action_send (req, 1);
return;
default:
nn_fsm_bad_action (req->state, src, type);
}
default:
nn_fsm_bad_source (req->state, src, type);
}
/******************************************************************************/
/* DELAYED state. */
/* Request was submitted but it could not be sent to the network because */
/* there was no peer available at the moment. Now we are waiting for the */
/* peer to arrive to send the request to it. */
/******************************************************************************/
case NN_REQ_STATE_DELAYED:
switch (src) {
case NN_FSM_ACTION:
switch (type) {
case NN_REQ_ACTION_OUT:
nn_req_action_send (req, 0);
return;
case NN_REQ_ACTION_SENT:
return;
default:
nn_fsm_bad_action (req->state, src, type);
}
default:
nn_fsm_bad_source (req->state, src, type);
}
/******************************************************************************/
/* ACTIVE state. */
/* Request was submitted. Waiting for reply. */
/******************************************************************************/
case NN_REQ_STATE_ACTIVE:
switch (src) {
case NN_FSM_ACTION:
switch (type) {
case NN_REQ_ACTION_IN:
/* Reply arrived. */
nn_timer_stop (&req->task.timer);
req->task.sent_to = NULL;
req->state = NN_REQ_STATE_STOPPING_TIMER;
return;
case NN_REQ_ACTION_SENT:
/* New request was sent while the old one was still being
processed. Cancel the old request first. */
nn_timer_stop (&req->task.timer);
req->task.sent_to = NULL;
req->state = NN_REQ_STATE_CANCELLING;
return;
case NN_REQ_ACTION_PIPE_RM:
/* Pipe that we sent request to is removed */
nn_timer_stop (&req->task.timer);
req->task.sent_to = NULL;
/* Pretend we timed out so request resent immediately */
req->state = NN_REQ_STATE_TIMED_OUT;
return;
default:
nn_fsm_bad_action (req->state, src, type);
}
case NN_REQ_SRC_RESEND_TIMER:
switch (type) {
case NN_TIMER_TIMEOUT:
nn_timer_stop (&req->task.timer);
req->task.sent_to = NULL;
req->state = NN_REQ_STATE_TIMED_OUT;
return;
default:
nn_fsm_bad_action (req->state, src, type);
}
default:
nn_fsm_bad_source (req->state, src, type);
}
/******************************************************************************/
/* TIMED_OUT state. */
/* Waiting for reply has timed out. Stopping the timer. Afterwards, we'll */
/* re-send the request. */
/******************************************************************************/
case NN_REQ_STATE_TIMED_OUT:
switch (src) {
case NN_REQ_SRC_RESEND_TIMER:
switch (type) {
case NN_TIMER_STOPPED:
nn_req_action_send (req, 1);
return;
default:
nn_fsm_bad_action (req->state, src, type);
}
case NN_FSM_ACTION:
switch (type) {
case NN_REQ_ACTION_SENT:
req->state = NN_REQ_STATE_CANCELLING;
return;
default:
nn_fsm_bad_action (req->state, src, type);
}
default:
nn_fsm_bad_source (req->state, src, type);
}
/******************************************************************************/
/* CANCELLING state. */
/* Request was canceled. Waiting till the timer is stopped. Note that */
/* cancelling is done by sending a new request. Thus there's already */
/* a request waiting to be sent in this state. */
/******************************************************************************/
case NN_REQ_STATE_CANCELLING:
switch (src) {
case NN_REQ_SRC_RESEND_TIMER:
switch (type) {
case NN_TIMER_STOPPED:
/* Timer is stopped. Now we can send the delayed request. */
nn_req_action_send (req, 1);
return;
default:
nn_fsm_bad_action (req->state, src, type);
}
case NN_FSM_ACTION:
switch (type) {
case NN_REQ_ACTION_SENT:
/* No need to do anything here. Old delayed request is just
replaced by the new one that will be sent once the timer
is closed. */
return;
default:
nn_fsm_bad_action (req->state, src, type);
}
default:
nn_fsm_bad_source (req->state, src, type);
}
/******************************************************************************/
/* STOPPING_TIMER state. */
/* Reply was delivered. Waiting till the timer is stopped. */
/******************************************************************************/
case NN_REQ_STATE_STOPPING_TIMER:
switch (src) {
case NN_REQ_SRC_RESEND_TIMER:
switch (type) {
case NN_TIMER_STOPPED:
req->state = NN_REQ_STATE_DONE;
return;
default:
nn_fsm_bad_action (req->state, src, type);
}
case NN_FSM_ACTION:
switch (type) {
case NN_REQ_ACTION_SENT:
req->state = NN_REQ_STATE_CANCELLING;
return;
default:
nn_fsm_bad_action (req->state, src, type);
}
default:
nn_fsm_bad_source (req->state, src, type);
}
/******************************************************************************/
/* DONE state. */
/* Reply was received but not yet retrieved by the user. */
/******************************************************************************/
case NN_REQ_STATE_DONE:
switch (src) {
case NN_FSM_ACTION:
switch (type) {
case NN_REQ_ACTION_RECEIVED:
req->state = NN_REQ_STATE_PASSIVE;
return;
case NN_REQ_ACTION_SENT:
nn_req_action_send (req, 1);
return;
default:
nn_fsm_bad_action (req->state, src, type);
}
default:
nn_fsm_bad_source (req->state, src, type);
}
/******************************************************************************/
/* Invalid state. */
/******************************************************************************/
default:
nn_fsm_bad_state (req->state, src, type);
}
}
