1 /* $NetBSD: poll.h,v 1.15 2009/11/11 09:48:51 rmind Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles M. Hannum. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef _SYS_POLL_H_ 33 #define _SYS_POLL_H_ 34 35 #include <sys/featuretest.h> 36 37 typedef unsigned int nfds_t; 38 39 struct pollfd { 40 int fd; /* file descriptor */ 41 short events; /* events to look for */ 42 short revents; /* events returned */ 43 }; 44 45 /* 46 * Testable events (may be specified in events field). 47 */ 48 #define POLLIN 0x0001 49 #define POLLPRI 0x0002 50 #define POLLOUT 0x0004 51 #define POLLRDNORM 0x0040 52 #define POLLWRNORM POLLOUT 53 #define POLLRDBAND 0x0080 54 #define POLLWRBAND 0x0100 55 56 /* 57 * Non-testable events (may not be specified in events field). 58 */ 59 #define POLLERR 0x0008 60 #define POLLHUP 0x0010 61 #define POLLNVAL 0x0020 62 63 #if defined(_NETBSD_SOURCE) 64 /* 65 * Infinite timeout value. 66 */ 67 #define INFTIM -1 68 #endif 69 70 #ifdef _KERNEL 71 #include <sys/signal.h> /* for sigset_t */ 72 73 struct lwp; 74 struct timespec; 75 76 int pollcommon(register_t *, struct pollfd *, u_int, 77 struct timespec *, sigset_t *); 78 79 #else 80 #include <sys/cdefs.h> 81 82 __BEGIN_DECLS 83 int poll(struct pollfd *, nfds_t, int); 84 __END_DECLS 85 86 #ifdef _NETBSD_SOURCE 87 #include <sys/sigtypes.h> /* for sigset_t */ 88 struct timespec; 89 90 __BEGIN_DECLS 91 #ifndef __LIBC12_SOURCE__ 92 int pollts(struct pollfd * __restrict, nfds_t, 93 const struct timespec * __restrict, const sigset_t * __restrict) 94 __RENAME(__pollts50); 95 #endif /* __LIBC12_SOURCE__ */ 96 __END_DECLS 97 #endif /* _NETBSD_SOURCE */ 98 99 #endif /* _KERNEL */ 100 101 #endif /* !_SYS_POLL_H_ */ 102