Hello.I'm a newbie still playing around trying to grasp 0mq.
I'm re-writing the first example with polling.So my REP has become
zmq_pollitem_t local_zmq_sockets[1];
int main (void)
{
zmq_msg_t request;
void *context = zmq_init (1);
const char * chptr = 0;
int zerr = 0;
// Socket to talk to clients
void *responder = zmq_socket (context, ZMQ_REP);
zmq_bind (responder, "tcp://*:5555");
s_catch_signals ();
local_zmq_sockets[0].socket = responder;
local_zmq_sockets[0].events = ZMQ_POLLIN;
while (1) {
// Wait for next request from client
zerr = zmq_poll(local_zmq_sockets,1,5);
if (local_zmq_sockets[0].revents & ZMQ_POLLIN) {
zmq_msg_init (&request);
zmq_recv (responder, &request, 0);
zmq_msg_close(&request);
}
zerr = zmq_errno();
if (zerr != 0)
{ chptr = zmq_strerror(zerr);
printf ("\n%s\n", chptr);
}
zmq_msg_close (&request);
if (s_interrupted) {
printf ("\nSIGTERM interrupt received, killing server…\n");
break;
}
// Do some 'work'
sleep (1);
// Send reply back to client
zmq_msg_t reply;
zmq_msg_init_size (&reply, 5);
memcpy (zmq_msg_data (&reply), "Prova", 5);
zmq_send (responder, &reply, 0);
zmq_msg_close (&reply);
}
// We never get here but if we did, this would be how we end
zmq_close (responder);
zmq_term (context);
return 0;
}
Now the fact is that when it's sitting idly waiting for a REQ, the error number
reported after the POLL call is always 11, and the associated string
is"Resource temporarily unavailable"
I don't get this: should I *not* check for errors after zmq_poll???
I expected a 0 after a correct poll.Even when a message comes in, it still
gives the same error code.
Can anyone please explaing this behviour to me?
ThanksRegardsClaudio Carbone
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