129347Speter/*- 229347Speter * Copyright (c) 1997 Peter Wemm <peter@freebsd.org> 329347Speter * All rights reserved. 429347Speter * 529347Speter * Redistribution and use in source and binary forms, with or without 629347Speter * modification, are permitted provided that the following conditions 729347Speter * are met: 829347Speter * 1. Redistributions of source code must retain the above copyright 929347Speter * notice, this list of conditions and the following disclaimer. 1029347Speter * 2. Redistributions in binary form must reproduce the above copyright 1129347Speter * notice, this list of conditions and the following disclaimer in the 1229347Speter * documentation and/or other materials provided with the distribution. 1329347Speter * 3. The name of the author may not be used to endorse or promote products 1429347Speter * derived from this software without specific prior written permission. 1529347Speter * 1629347Speter * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1729347Speter * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1829347Speter * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1929347Speter * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 2029347Speter * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2129347Speter * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2229347Speter * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2329347Speter * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2429347Speter * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2529347Speter * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2629347Speter * SUCH DAMAGE. 2729347Speter * 2850477Speter * $FreeBSD$ 2929347Speter */ 3029347Speter 3129347Speter#ifndef _SYS_POLL_H_ 3229347Speter#define _SYS_POLL_H_ 3329347Speter 3499593Smike#include <sys/cdefs.h> 3599593Smike 3629347Speter/* 3772093Sasmodai * This file is intended to be compatible with the traditional poll.h. 3829347Speter */ 3929347Speter 4099593Smiketypedef unsigned int nfds_t; 4199593Smike 4229347Speter/* 4333059Sbde * This structure is passed as an array to poll(2). 4429347Speter */ 4529347Speterstruct pollfd { 4629347Speter int fd; /* which file descriptor to poll */ 4729347Speter short events; /* events we are interested in */ 4829347Speter short revents; /* events found on return */ 4929347Speter}; 5029347Speter 5129347Speter/* 5229347Speter * Requestable events. If poll(2) finds any of these set, they are 5329347Speter * copied to revents on return. 5429347Speter * XXX Note that FreeBSD doesn't make much distinction between POLLPRI 5529347Speter * and POLLRDBAND since none of the file types have distinct priority 5629347Speter * bands - and only some have an urgent "mode". 5729347Speter * XXX Note POLLIN isn't really supported in true SVSV terms. Under SYSV 5829347Speter * POLLIN includes all of normal, band and urgent data. Most poll handlers 5929347Speter * on FreeBSD only treat it as "normal" data. 6029347Speter */ 6129347Speter#define POLLIN 0x0001 /* any readable data available */ 6229347Speter#define POLLPRI 0x0002 /* OOB/Urgent readable data */ 6329347Speter#define POLLOUT 0x0004 /* file descriptor is writeable */ 6429347Speter#define POLLRDNORM 0x0040 /* non-OOB/URG data available */ 6529347Speter#define POLLWRNORM POLLOUT /* no write type differentiation */ 6629347Speter#define POLLRDBAND 0x0080 /* OOB/Urgent readable data */ 6729347Speter#define POLLWRBAND 0x0100 /* OOB/Urgent data can be written */ 6829347Speter 6999710Smike#if __BSD_VISIBLE 7094997Salfred/* General FreeBSD extension (currently only supported for sockets): */ 7194997Salfred#define POLLINIGNEOF 0x2000 /* like POLLIN, except ignore EOF */ 7299593Smike#endif 7331727Swollman 7431727Swollman/* 7529347Speter * These events are set if they occur regardless of whether they were 7629347Speter * requested. 7729347Speter */ 7829347Speter#define POLLERR 0x0008 /* some poll error occurred */ 7929347Speter#define POLLHUP 0x0010 /* file descriptor was "hung up" */ 8029347Speter#define POLLNVAL 0x0020 /* requested events "invalid" */ 8129347Speter 8299593Smike#if __BSD_VISIBLE 8399593Smike 8431727Swollman#define POLLSTANDARD (POLLIN|POLLPRI|POLLOUT|POLLRDNORM|POLLRDBAND|\ 8531727Swollman POLLWRBAND|POLLERR|POLLHUP|POLLNVAL) 8631727Swollman 8729373Speter/* 8833059Sbde * Request that poll() wait forever. 8933059Sbde * XXX in SYSV, this is defined in stropts.h, which is not included 9033059Sbde * by poll.h. 9129373Speter */ 9233059Sbde#define INFTIM (-1) 9329373Speter 9499593Smike#endif 9599593Smike 9655205Speter#ifndef _KERNEL 9733059Sbde 9829347Speter__BEGIN_DECLS 9999593Smikeint poll(struct pollfd _pfd[], nfds_t _nfds, int _timeout); 10029347Speter__END_DECLS 10129347Speter 10255205Speter#endif /* !_KERNEL */ 10333059Sbde 10429347Speter#endif /* !_SYS_POLL_H_ */ 105