MEDIUM: kqueue: only set FD_POLL_IN when there are pending data

Let's avoid setting FD_POLL_IN when there's no pending data. It will
save a useless recv() syscall on pure closes.

diff --git a/src/ev_kqueue.c b/src/ev_kqueue.c
index 6f41c73..f1c0b8d 100644 (file)
--- a/src/ev_kqueue.c
+++ b/src/ev_kqueue.c
@@ -125,7 +125,8 @@ REGPRM2 static void _do_poll(struct poller *p, int exp)
                fdtab[fd].ev &= FD_POLL_STICKY;
 
                if (kev[count].filter ==  EVFILT_READ) {
-                       fdtab[fd].ev |= FD_POLL_IN;
+                       if (kev[count].data)
+                               fdtab[fd].ev |= FD_POLL_IN;
                        if (kev[count].flags & EV_EOF)
                                fdtab[fd].ev |= FD_POLL_HUP;
                }