| 1 |
30 |
unneback |
/*-
|
| 2 |
|
|
* Copyright (c) 1997 Peter Wemm <peter@freebsd.org>
|
| 3 |
|
|
* All rights reserved.
|
| 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 AND CONTRIBUTORS ``AS IS'' AND
|
| 17 |
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
| 18 |
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
| 19 |
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
| 20 |
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
| 21 |
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
| 22 |
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
| 23 |
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
| 24 |
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
| 25 |
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
| 26 |
|
|
* SUCH DAMAGE.
|
| 27 |
|
|
*
|
| 28 |
|
|
* $Id: poll.h,v 1.2 2001-09-27 12:01:48 chris Exp $
|
| 29 |
|
|
*/
|
| 30 |
|
|
|
| 31 |
|
|
#ifndef _SYS_POLL_H_
|
| 32 |
|
|
#define _SYS_POLL_H_
|
| 33 |
|
|
|
| 34 |
|
|
/*
|
| 35 |
|
|
* This file is intended to be compatable with the traditional poll.h.
|
| 36 |
|
|
*/
|
| 37 |
|
|
|
| 38 |
|
|
/*
|
| 39 |
|
|
* This structure is passed as an array to poll(2).
|
| 40 |
|
|
*/
|
| 41 |
|
|
struct pollfd {
|
| 42 |
|
|
int fd; /* which file descriptor to poll */
|
| 43 |
|
|
short events; /* events we are interested in */
|
| 44 |
|
|
short revents; /* events found on return */
|
| 45 |
|
|
};
|
| 46 |
|
|
|
| 47 |
|
|
/*
|
| 48 |
|
|
* Requestable events. If poll(2) finds any of these set, they are
|
| 49 |
|
|
* copied to revents on return.
|
| 50 |
|
|
* XXX Note that FreeBSD doesn't make much distinction between POLLPRI
|
| 51 |
|
|
* and POLLRDBAND since none of the file types have distinct priority
|
| 52 |
|
|
* bands - and only some have an urgent "mode".
|
| 53 |
|
|
* XXX Note POLLIN isn't really supported in true SVSV terms. Under SYSV
|
| 54 |
|
|
* POLLIN includes all of normal, band and urgent data. Most poll handlers
|
| 55 |
|
|
* on FreeBSD only treat it as "normal" data.
|
| 56 |
|
|
*/
|
| 57 |
|
|
#define POLLIN 0x0001 /* any readable data available */
|
| 58 |
|
|
#define POLLPRI 0x0002 /* OOB/Urgent readable data */
|
| 59 |
|
|
#define POLLOUT 0x0004 /* file descriptor is writeable */
|
| 60 |
|
|
#define POLLRDNORM 0x0040 /* non-OOB/URG data available */
|
| 61 |
|
|
#define POLLWRNORM POLLOUT /* no write type differentiation */
|
| 62 |
|
|
#define POLLRDBAND 0x0080 /* OOB/Urgent readable data */
|
| 63 |
|
|
#define POLLWRBAND 0x0100 /* OOB/Urgent data can be written */
|
| 64 |
|
|
|
| 65 |
|
|
/*
|
| 66 |
|
|
* FreeBSD extensions: polling on a regular file might return one
|
| 67 |
|
|
* of these events (currently only supported on UFS).
|
| 68 |
|
|
*/
|
| 69 |
|
|
#define POLLEXTEND 0x0200 /* file may have been extended */
|
| 70 |
|
|
#define POLLATTRIB 0x0400 /* file attributes may have changed */
|
| 71 |
|
|
#define POLLNLINK 0x0800 /* (un)link/rename may have happened */
|
| 72 |
|
|
#define POLLWRITE 0x1000 /* file's contents may have changed */
|
| 73 |
|
|
|
| 74 |
|
|
/*
|
| 75 |
|
|
* These events are set if they occur regardless of whether they were
|
| 76 |
|
|
* requested.
|
| 77 |
|
|
*/
|
| 78 |
|
|
#define POLLERR 0x0008 /* some poll error occurred */
|
| 79 |
|
|
#define POLLHUP 0x0010 /* file descriptor was "hung up" */
|
| 80 |
|
|
#define POLLNVAL 0x0020 /* requested events "invalid" */
|
| 81 |
|
|
|
| 82 |
|
|
#define POLLSTANDARD (POLLIN|POLLPRI|POLLOUT|POLLRDNORM|POLLRDBAND|\
|
| 83 |
|
|
POLLWRBAND|POLLERR|POLLHUP|POLLNVAL)
|
| 84 |
|
|
|
| 85 |
|
|
/*
|
| 86 |
|
|
* Request that poll() wait forever.
|
| 87 |
|
|
* XXX in SYSV, this is defined in stropts.h, which is not included
|
| 88 |
|
|
* by poll.h.
|
| 89 |
|
|
*/
|
| 90 |
|
|
#define INFTIM (-1)
|
| 91 |
|
|
|
| 92 |
|
|
#ifndef KERNEL
|
| 93 |
|
|
|
| 94 |
|
|
#include <sys/cdefs.h>
|
| 95 |
|
|
|
| 96 |
|
|
__BEGIN_DECLS
|
| 97 |
|
|
/*
|
| 98 |
|
|
* XXX logically, poll() should be declared in <poll.h>, but SVR4 at
|
| 99 |
|
|
* least has it here in <sys/poll.h>.
|
| 100 |
|
|
* XXX poll() has "unsigned long" nfds on SVR4, not unsigned as on the
|
| 101 |
|
|
* other BSDs.
|
| 102 |
|
|
*/
|
| 103 |
|
|
int poll __P((struct pollfd *_pfd, unsigned _nfds, int _timeout));
|
| 104 |
|
|
__END_DECLS
|
| 105 |
|
|
|
| 106 |
|
|
#endif /* !KERNEL */
|
| 107 |
|
|
|
| 108 |
|
|
#endif /* !_SYS_POLL_H_ */
|
