Fixing the select event loop so it does not give up for naked timers in Windows.

Making sure the poll event loop works on windows.
Fixing the poll event loop so it does not give up for naked timers in Windows.

src/extension/poll_eventloop.c

@@ -30,8 +30,10 @@
 #ifdef HAVE_SYS_POLL_H
 #include <sys/poll.h>
 #else
+#ifndef USE_WINSOCK
 #include <poll.h>
 #endif
+#endif
 #ifdef HAVE_SYS_RESOURCE_H
 #include <sys/resource.h>
 #endif
@@ -402,6 +404,10 @@ poll_eventloop_run_once(getdns_eventloop *loop, int blocking)
 		   , poll_timeout
 		   );
 #ifdef USE_WINSOCK
+    if (poll_loop->fd_events_free == 0)
+    {
+        Sleep(poll_timeout);
+    } else
 	if (WSAPoll(poll_loop->pfds, poll_loop->fd_events_free, poll_timeout) < 0) {
 #else	
 	if (poll(poll_loop->pfds, poll_loop->fd_events_free, poll_timeout) < 0) {

src/extension/select_eventloop.c

@@ -234,6 +234,16 @@ select_eventloop_run_once(getdns_eventloop *loop, int blocking)
 		tv.tv_sec  = (long)((timeout - now) / 1000000);
 		tv.tv_usec = (long)((timeout - now) % 1000000);
 	}
+#ifdef USE_WINSOCK
+    if (max_fd == -1)
+    {
+        if (timeout != TIMEOUT_FOREVER)
+        {
+            uint32_t timeout_ms = (tv.tv_usec / 1000) + (tv.tv_sec * 1000);
+            Sleep(timeout_ms);
+        }
+    } else
+#endif
 	if (select(max_fd + 1, &readfds, &writefds, NULL,
 	    (timeout == TIMEOUT_FOREVER ? NULL : &tv)) < 0) {
 		perror("select() failed");

src/stub.c

@@ -36,7 +36,11 @@
 # ifdef HAVE_SYS_POLL_H
 #  include <sys/poll.h>
 # else
+#ifdef USE_WINSOCK
+#define poll(fdarray, nbsockets, timer) WSAPoll(fdarray, nbsockets, timer)
+#else
 #  include <poll.h>
+#endif
 # endif
 #endif
 #include "debug.h"