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remove libevent code (a comment and the kevent test) from ev_kqueue and relicense under libev license

This commit is contained in:
Marc Alexander Lehmann 2007-11-26 08:04:03 +00:00
parent a7591917b3
commit 63d6521d09
1 changed files with 23 additions and 49 deletions
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72
ev_kqueue.c
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@ -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:
*
* 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 of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 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,
* * 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 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;