[ViewVC] Diff of: cvs/libev/ev

Comparing libev/ev_kqueue.c (file contents):
Revision 1.39 by root, Tue Jul 14 17:57:47 2009 UTC vs.
Revision 1.54 by root, Mon Apr 2 18:39:54 2012 UTC

 /*
  * libev kqueue backend
  *
- * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
+ * Copyright (c) 2007,2008,2009,2010,2011,2012 Marc Alexander Lehmann <libev@schmorp.de>
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without modifica-
  * tion, are permitted provided that the following conditions are met:
  *
  *   1.  Redistributions of source code must retain the above copyright notice,
  *       this list of conditions and the following disclaimer.
  *
  *   2.  Redistributions in binary form must reproduce the above copyright
  *       notice, this list of conditions and the following disclaimer in the
  *       documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
  * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
  * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * either the BSD or the GPL.
  */
 #include <sys/types.h>
 #include <sys/time.h>
-#include <sys/queue.h>
 #include <sys/event.h>
 #include <string.h>
 #include <errno.h>
 void inline_speed
   array_needsize (struct kevent, kqueue_changes, kqueue_changemax, kqueue_changecnt, EMPTY2);
   EV_SET (&kqueue_changes [kqueue_changecnt - 1], fd, filter, flags, fflags, 0, 0);
 }
+/* OS X at least needs this */
+#ifndef EV_ENABLE
+# define EV_ENABLE 0
+#endif
 #ifndef NOTE_EOF
 # define NOTE_EOF 0
 #endif
 static void
   /* to detect close/reopen reliably, we have to re-add */
   /* event requests even when oev == nev */
   if (nev & EV_READ)
-    kqueue_change (EV_A_ fd, EVFILT_READ , EV_ADD, NOTE_EOF);
+    kqueue_change (EV_A_ fd, EVFILT_READ , EV_ADD | EV_ENABLE, NOTE_EOF);
   if (nev & EV_WRITE)
-    kqueue_change (EV_A_ fd, EVFILT_WRITE, EV_ADD, NOTE_EOF);
+    kqueue_change (EV_A_ fd, EVFILT_WRITE, EV_ADD | EV_ENABLE, NOTE_EOF);
 }
 static void
 kqueue_poll (EV_P_ ev_tstamp timeout)
 {
       kqueue_eventmax = array_nextsize (sizeof (struct kevent), kqueue_eventmax, kqueue_changecnt);
       kqueue_events = (struct kevent *)ev_malloc (sizeof (struct kevent) * kqueue_eventmax);
     }
   EV_RELEASE_CB;
-  ts.tv_sec  = (time_t)timeout;
+  EV_TS_SET (ts, timeout);
-  ts.tv_nsec = (long)((timeout - (ev_tstamp)ts.tv_sec) * 1e9);
   res = kevent (backend_fd, kqueue_changes, kqueue_changecnt, kqueue_events, kqueue_eventmax, &ts);
   EV_ACQUIRE_CB;
   kqueue_changecnt = 0;
   if (expect_false (res < 0))
     {
       if (errno != EINTR)
         ev_syserr ("(libev) kevent");
       return;
     }
   for (i = 0; i < res; ++i)
     {
       int fd = kqueue_events [i].ident;
       if (expect_false (kqueue_events [i].flags & EV_ERROR))
         {
-	  int err = kqueue_events [i].data;
+          int err = kqueue_events [i].data;
           /* we are only interested in errors for fds that we are interested in :) */
           if (anfds [fd].events)
-	    {
+            {
               if (err == ENOENT) /* resubmit changes on ENOENT */
                 kqueue_modify (EV_A_ fd, 0, anfds [fd].events);
               else if (err == EBADF) /* on EBADF, we re-check the fd */
                 {
                   if (fd_valid (fd))
                   else
                     fd_kill (EV_A_ fd);
                 }
               else /* on all other errors, we error out on the fd */
                 fd_kill (EV_A_ fd);
-	    }
+            }
         }
       else
         fd_event (
           EV_A_
           fd,
 }
 int inline_size
 kqueue_init (EV_P_ int flags)
 {
-  /* Initalize the kernel queue */
+  /* initialize the kernel queue */
+  kqueue_fd_pid = getpid ();
   if ((backend_fd = kqueue ()) < 0)
     return 0;
   fcntl (backend_fd, F_SETFD, FD_CLOEXEC); /* not sure if necessary, hopefully doesn't hurt */
-  backend_fudge  = 0.;
+  backend_mintime = 1e-9; /* apparently, they did the right thing in freebsd */
-  backend_modify = kqueue_modify;
+  backend_modify  = kqueue_modify;
-  backend_poll   = kqueue_poll;
+  backend_poll    = kqueue_poll;
   kqueue_eventmax = 64; /* initial number of events receivable per poll */
   kqueue_events = (struct kevent *)ev_malloc (sizeof (struct kevent) * kqueue_eventmax);
   kqueue_changes   = 0;
 }
 void inline_size
 kqueue_fork (EV_P)
 {
+  /* some BSD kernels don't just destroy the kqueue itself,
+   * but also close the fd, which isn't documented, and
+   * impossible to support properly.
+   * we remember the pid of the kqueue call and only close
+   * the fd if the pid is still the same.
+   * this leaks fds on sane kernels, but BSD interfaces are
+   * notoriously buggy and rarely get fixed.
+   */
+  pid_t newpid = getpid ();
+  if (newpid == kqueue_fd_pid)
-  close (backend_fd);
+    close (backend_fd);
+  kqueue_fd_pid = newpid;
   while ((backend_fd = kqueue ()) < 0)
     ev_syserr ("(libev) kqueue");
   fcntl (backend_fd, F_SETFD, FD_CLOEXEC);
   /* re-register interest in fds */
   fd_rearm_all (EV_A);
 }
+/* sys/event.h defines EV_ERROR */
+#undef EV_ERROR

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Comparing libev/ev_kqueue.c (file contents): Revision 1.39 by root, Tue Jul 14 17:57:47 2009 UTC vs. Revision 1.54 by root, Mon Apr 2 18:39:54 2012 UTC

Diff Legend

Comparing libev/ev_kqueue.c (file contents):
Revision 1.39 by root, Tue Jul 14 17:57:47 2009 UTC vs.
Revision 1.54 by root, Mon Apr 2 18:39:54 2012 UTC