epoll_sub.c (2391B)
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 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 }