Problem: poller_t is copyable, but does not implement copying properly

Solution: make poller_t non-copyable, but properly movable

Author: sigiesec

zmq.hpp

@@ -990,8 +990,28 @@ namespace zmq
 
         ~poller_t ()
         {
-            zmq_poller_destroy (&poller_ptr);
+            if (poller_ptr)
+            {
+                int rc = zmq_poller_destroy (&poller_ptr);
+                assert(rc == 0);
+            }
+        }
+		
+        poller_t(const poller_t&) = delete;
+        poller_t &operator=(const poller_t&) = delete;
+        poller_t(poller_t&& src) 
+          : poller_ptr(src.poller_ptr)
+          , poller_events(std::move (src.poller_events))
+        {
+            src.poller_ptr = NULL;
         }
+        poller_t &operator=(poller_t&& src)
+        {
+            poller_ptr = src.poller_ptr;
+            poller_events = std::move (src.poller_events);
+            src.poller_ptr = NULL;
+            return *this;
+        }		
 
         bool add (zmq::socket_t &socket, short events, std::function<void(void)> &handler)
         {