diff options
| -rw-r--r-- | ev_kqueue.c | 72 |
1 files changed, 23 insertions, 49 deletions
diff --git a/ev_kqueue.c b/ev_kqueue.c index 41a5dbe..7a34e9b 100644 --- a/ev_kqueue.c +++ b/ev_kqueue.c @@ -1,30 +1,32 @@ /* - * Copyright 2007 Marc Alexander Lehmann <libev@schmorp.de> - * Copyright 2000-2002 Niels Provos <provos@citi.umich.edu> + * libev kqueue backend + * + * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> * All rights reserved. * * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. * - * 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. + * * 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 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, + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "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 COPYRIGHT + * OWNER OR CONTRIBUTORS 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. + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include <sys/types.h> @@ -106,16 +108,6 @@ kqueue_poll (EV_P_ ev_tstamp timeout) { 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) { @@ -161,30 +153,12 @@ kqueue_init (EV_P_ int flags) 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; - } - + /* fudge *might* be zero from the documentation, but bsd docs are notoriously wrong */ backend_fudge = 1e-3; /* needed to compensate for kevent returning early */ 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; |