*** empty log message ***

[software/libev.git] / ev_kqueue.c

diff --git a/ev_kqueue.c b/ev_kqueue.c
index 41a5dbebf319c752b2dba28546635b285bdb116c..369d493508e5e605af4d395be02cc16c755f8a9e 100644 (file)
--- a/ev_kqueue.c
+++ b/ev_kqueue.c
@@ -1,30 +1,40 @@
 /*
 /*

- * Copyright 2007      Marc Alexander Lehmann <libev@schmorp.de>
- * Copyright 2000-2002 Niels Provos <provos@citi.umich.edu>
- * All rights reserved.
+ * libev kqueue backend

  *
  *

- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
+ * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
+ * All rights reserved.

  *
  *

- * 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.
- * 3. The name of the author may not be used to endorse or promote products
- *    derived from this software without specific prior written permission.
+ * 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,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
+ * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.

  *
  *

- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * Alternatively, the contents of this file may be used under the terms of
+ * the GNU General Public License ("GPL") version 2 or any later version,
+ * in which case the provisions of the GPL are applicable instead of
+ * the above. If you wish to allow the use of your version of this file
+ * only under the terms of the GPL and not to allow others to use your
+ * version of this file under the BSD license, indicate your decision
+ * by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL. If you do not delete the
+ * provisions above, a recipient may use your version of this file under
+ * either the BSD or the GPL.

  */
 
 #include <sys/types.h>
  */
 
 #include <sys/types.h>


@@ -34,11 +44,9 @@
 #include <string.h>
 #include <errno.h>
 
 #include <string.h>
 #include <errno.h>
 

-static void
+void inline_speed

 kqueue_change (EV_P_ int fd, int filter, int flags, int fflags)
 {
 kqueue_change (EV_P_ int fd, int filter, int flags, int fflags)
 {

-  struct kevent *ke;
-

   ++kqueue_changecnt;
   array_needsize (struct kevent, kqueue_changes, kqueue_changemax, kqueue_changecnt, EMPTY2);
 
   ++kqueue_changecnt;
   array_needsize (struct kevent, kqueue_changes, kqueue_changemax, kqueue_changecnt, EMPTY2);
 


@@ -81,7 +89,7 @@ kqueue_poll (EV_P_ ev_tstamp timeout)
   if (kqueue_changecnt > kqueue_eventmax)
     {
       ev_free (kqueue_events);
   if (kqueue_changecnt > kqueue_eventmax)
     {
       ev_free (kqueue_events);

-      kqueue_eventmax = array_roundsize (struct kevent, kqueue_changecnt);
+      kqueue_eventmax = array_nextsize (sizeof (struct kevent), kqueue_eventmax, kqueue_changecnt);

       kqueue_events = (struct kevent *)ev_malloc (sizeof (struct kevent) * kqueue_eventmax);
     }
 
       kqueue_events = (struct kevent *)ev_malloc (sizeof (struct kevent) * kqueue_eventmax);
     }
 


@@ -90,7 +98,7 @@ kqueue_poll (EV_P_ ev_tstamp timeout)
   res = kevent (backend_fd, kqueue_changes, kqueue_changecnt, kqueue_events, kqueue_eventmax, &ts);
   kqueue_changecnt = 0;
 
   res = kevent (backend_fd, kqueue_changes, kqueue_changecnt, kqueue_events, kqueue_eventmax, &ts);
   kqueue_changecnt = 0;
 

-  if (res < 0)
+  if (expect_false (res < 0))

     { 
       if (errno != EINTR)
         syserr ("(libev) kevent");
     { 
       if (errno != EINTR)
         syserr ("(libev) kevent");


@@ -106,16 +114,6 @@ kqueue_poll (EV_P_ ev_tstamp timeout)
         {
          int err = kqueue_events [i].data;
 
         {
          int err = kqueue_events [i].data;
 

-          /* 
-           * errors that may happen
-           *   EBADF happens when the file discriptor has been
-           *   closed,
-           *   ENOENT when the file descriptor was closed and
-           *   then reopened.
-           *   EINVAL for some reasons not understood; EINVAL
-           *   should not be returned ever; but FreeBSD does :-\
-           */
-

           /* we are only interested in errors for fds that we are interested in :) */
           if (anfds [fd].events)
            {
           /* we are only interested in errors for fds that we are interested in :) */
           if (anfds [fd].events)
            {


@@ -145,46 +143,25 @@ kqueue_poll (EV_P_ ev_tstamp timeout)
   if (expect_false (res == kqueue_eventmax))
     {
       ev_free (kqueue_events);
   if (expect_false (res == kqueue_eventmax))
     {
       ev_free (kqueue_events);

-      kqueue_eventmax = array_roundsize (struct kevent, kqueue_eventmax << 1);
+      kqueue_eventmax = array_nextsize (sizeof (struct kevent), kqueue_eventmax, kqueue_eventmax + 1);

       kqueue_events = (struct kevent *)ev_malloc (sizeof (struct kevent) * kqueue_eventmax);
     }
 }
 
       kqueue_events = (struct kevent *)ev_malloc (sizeof (struct kevent) * kqueue_eventmax);
     }
 }
 

-static int
+int inline_size

 kqueue_init (EV_P_ int flags)
 {
 kqueue_init (EV_P_ int flags)
 {

-  struct kevent ch, ev;
-

   /* Initalize the kernel queue */
   if ((backend_fd = kqueue ()) < 0)
     return 0;
 
   fcntl (backend_fd, F_SETFD, FD_CLOEXEC); /* not sure if necessary, hopefully doesn't hurt */
 
   /* Initalize the kernel queue */
   if ((backend_fd = kqueue ()) < 0)
     return 0;
 
   fcntl (backend_fd, F_SETFD, FD_CLOEXEC); /* not sure if necessary, hopefully doesn't hurt */
 

-  /* Check for Mac OS X kqueue bug. */
-  ch.ident  = -1;
-  ch.filter = EVFILT_READ;
-  ch.flags  = EV_ADD;
-
-  /* 
-   * If kqueue works, then kevent will succeed, and it will
-   * stick an error in ev. If kqueue is broken, then
-   * kevent will fail.
-   */
-  if (kevent (backend_fd, &ch, 1, &ev, 1, 0) != 1
-      || ev.ident != -1
-      || ev.flags != EV_ERROR)
-    {
-      /* detected broken kqueue */
-      close (backend_fd);
-      return 0;
-    }
-
-  backend_fudge  = 1e-3; /* needed to compensate for kevent returning early */
+  backend_fudge  = 0.;

   backend_modify = kqueue_modify;
   backend_poll   = kqueue_poll;
 
   backend_modify = kqueue_modify;
   backend_poll   = kqueue_poll;
 

-  kqueue_eventmax = 64; /* intiial number of events receivable per 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;
   kqueue_events = (struct kevent *)ev_malloc (sizeof (struct kevent) * kqueue_eventmax);
 
   kqueue_changes   = 0;


@@ -194,16 +171,14 @@ kqueue_init (EV_P_ int flags)
   return EVBACKEND_KQUEUE;
 }
 
   return EVBACKEND_KQUEUE;
 }
 

-static void
+void inline_size

 kqueue_destroy (EV_P)
 {
 kqueue_destroy (EV_P)
 {

-  close (backend_fd);
-

   ev_free (kqueue_events);
   ev_free (kqueue_changes);
 }
 
   ev_free (kqueue_events);
   ev_free (kqueue_changes);
 }
 

-static void
+void inline_size

 kqueue_fork (EV_P)
 {
   close (backend_fd);
 kqueue_fork (EV_P)
 {
   close (backend_fd);