Problem: MSVC warnings in connection with poll

Solution: handle types properly

src/poll.cpp

@@ -43,6 +43,10 @@
 #include "config.hpp"
 #include "i_poll_events.hpp"
 
+#ifdef ZMQ_HAVE_WINDOWS
+typedef unsigned long nfds_t;
+#endif
+
 zmq::poll_t::poll_t (const zmq::thread_ctx_t &ctx_) :
     worker_poller_base_t (ctx_),
     retired (false)
@@ -155,7 +159,8 @@ void zmq::poll_t::loop ()
         }
 
         //  Wait for events.
-        int rc = poll (&pollset[0], pollset.size (), timeout ? timeout : -1);
+        int rc = poll (&pollset[0], static_cast<nfds_t> (pollset.size ()),
+                       timeout ? timeout : -1);
 #ifdef ZMQ_HAVE_WINDOWS
         wsa_assert (rc != SOCKET_ERROR);
 #else

src/socket_poller.cpp

@@ -31,6 +31,8 @@
 #include "socket_poller.hpp"
 #include "err.hpp"
 
+#include <limits.h>
+
 static bool is_thread_safe (zmq::socket_base_t &socket)
 {
     // do not use getsockopt here, since that would fail during context termination
@@ -575,7 +577,8 @@ int zmq::socket_poller_t::wait (zmq::socket_poller_t::event_t *events_,
         else if (timeout_ < 0)
             timeout = -1;
         else
-            timeout = end - now;
+            timeout =
+              static_cast<int> (std::min<uint64_t> (end - now, INT_MAX));
 
         //  Wait for events.
         while (true) {

src/zmq.cpp

@@ -867,7 +867,8 @@ int zmq_poll (zmq_pollitem_t *items_, int nitems_, long timeout_)
         else if (timeout_ < 0)
             timeout = -1;
         else
-            timeout = end - now;
+            timeout =
+              static_cast<int> (std::min<uint64_t> (end - now, INT_MAX));
 
         //  Wait for events.
         {