Minor code cleanup

src/epoll.cpp

@@ -140,9 +140,10 @@ void zmq::epoll_t::loop ()
         //  Wait for events.
         int n = epoll_wait (epoll_fd, &ev_buf [0], max_io_events,
             timeout ? timeout : -1);
-        if (n == -1 && errno == EINTR)
+        if (n == -1) {
+            errno_assert (errno == EINTR);
             continue;
-        errno_assert (n != -1);
+        }
 
         for (int i = 0; i < n; i ++) {
             poll_entry_t *pe = ((poll_entry_t*) ev_buf [i].data.ptr);

src/kqueue.cpp

@@ -163,9 +163,10 @@ void zmq::kqueue_t::loop ()
         timespec ts = {timeout / 1000, (timeout % 1000) * 1000000};
         int n = kevent (kqueue_fd, NULL, 0, &ev_buf [0], max_io_events,
             timeout ? &ts: NULL);
-        if (n == -1 && errno == EINTR)
+        if (n == -1) {
+            errno_assert (errno == EINTR);
             continue;
-        errno_assert (n != -1);
+        }
 
         for (int i = 0; i < n; i ++) {
             poll_entry_t *pe = (poll_entry_t*) ev_buf [i].udata;

src/poll.cpp

@@ -125,10 +125,10 @@ void zmq::poll_t::loop ()
 
         //  Wait for events.
         int rc = poll (&pollset [0], pollset.size (), timeout ? timeout : -1);
-        if (rc == -1 && errno == EINTR)
+        if (rc == -1) {
+            errno_assert (errno == EINTR);
             continue;
-        errno_assert (rc != -1);
-
+        }
 
         //  If there are no events (i.e. it's a timeout) there's no point
         //  in checking the pollset.

src/select.cpp

@@ -168,9 +168,10 @@ void zmq::select_t::loop ()
 #else
         int rc = select (maxfd + 1, &readfds, &writefds, &exceptfds,
             timeout ? &tv : NULL);
-        if (rc == -1 && errno == EINTR)
+        if (rc == -1) {
+            errno_assert (errno == EINTR);
             continue;
-        errno_assert (rc != -1);
+        }
 #endif
 
         //  If there are no events (i.e. it's a timeout) there's no point