external/bsd/libevent/dist/epoll_sub.c

   1 /*      $NetBSD: epoll_sub.c,v 1.1.1.2 2015/01/29 06:38:08 spz Exp $    */
   2 /*
   3  * Copyright 2003-2009 Niels Provos <provos@citi.umich.edu>
   4  * Copyright 2009-2012 Niels Provos and Nick Mathewson
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. The name of the author may not be used to endorse or promote products
  15  *    derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  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
  37 int
  38 epoll_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
  51 int
  52 epoll_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
  58 int
  59 epoll_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 }