Hi
I am considering adding a new socket option, in order to get the number
of subscriptions on the sub side socket.
This is because in the dynamic subscribe/unsubscribe scenario it is
possible to receive a message whilst in a loop
while (true)
{
zmq::message_t msg;
sm.recv(&msg);
// do an unsubscribe of last remaining subscription for this socket
// whoops return to the loop and we will block forever
}
If we could query the number of subscriptions from the socket,
the program could terminate cleanly.
Thoughts?
Jon
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