Multiple socket reader in C++

//
// Reading from multiple sockets in C++
// This version uses a simple recv loop
//
// Olivier Chamoux <moc.puorgselaht.rf|xuomahc.reivilo#moc.puorgselaht.rf|xuomahc.reivilo>

#include "zhelpers.hpp"

int main (int argc, char *argv[])
{
// Prepare our context and sockets
zmq::context_t context(1);

// Connect to task ventilator
zmq::socket_t receiver(context, ZMQ_PULL);
receiver.connect("tcp://localhost:5557");

// Connect to weather server
zmq::socket_t subscriber(context, ZMQ_SUB);
subscriber.connect("tcp://localhost:5556");
subscriber.setsockopt(ZMQ_SUBSCRIBE, "10001 ", 6);

// Process messages from both sockets
// We prioritize traffic from the task ventilator
while (1) {

// Process any waiting tasks
bool rc;
do {
zmq::message_t task;
if ((rc = receiver.recv(&task, ZMQ_DONTWAIT)) == true) {
// process task
}
} while(rc == true);

// Process any waiting weather updates
do {
zmq::message_t update;
if ((rc = subscriber.recv(&update, ZMQ_DONTWAIT)) == true) {
// process weather update

}
} while(rc == true);

// No activity, so sleep for 1 msec
s_sleep(1);
}
return 0;
}