epoll_sub.c revision 290001 
1/*
2 * Copyright 2003-2009 Niels Provos <provos@citi.umich.edu>
3 * Copyright 2009-2012 Niels Provos and Nick Mathewson
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 *    derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27#include "evconfig-private.h"
28#include <stdint.h>
29
30#include <sys/param.h>
31#include <sys/types.h>
32#include <sys/syscall.h>
33#include <sys/epoll.h>
34#include <unistd.h>
35#include <errno.h>
36
37int
38epoll_create(int size)
39{
40#if !defined(__NR_epoll_create) && defined(__NR_epoll_create1)
41	if (size <= 0) {
42		errno = EINVAL;
43		return -1;
44	}
45	return (syscall(__NR_epoll_create1, 0));
46#else
47	return (syscall(__NR_epoll_create, size));
48#endif
49}
50
51int
52epoll_ctl(int epfd, int op, int fd, struct epoll_event *event)
53{
54
55	return (syscall(__NR_epoll_ctl, epfd, op, fd, event));
56}
57
58int
59epoll_wait(int epfd, struct epoll_event *events, int maxevents, int timeout)
60{
61#if !defined(__NR_epoll_wait) && defined(__NR_epoll_pwait)
62	return (syscall(__NR_epoll_pwait, epfd, events, maxevents, timeout, NULL, 0));
63#else
64	return (syscall(__NR_epoll_wait, epfd, events, maxevents, timeout));
65#endif
66}
67