aboutsummaryrefslogtreecommitdiff
path: root/sysdeps/unix/sysv/linux/sparc/bits/poll.h
blob: 7472a8005c5e2f640777e089e51b1b244ed4c917 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
/* Copyright (C) 1997, 2001 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License as
   published by the Free Software Foundation; either version 2 of the
   License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#ifndef _SYS_POLL_H
# error "Never use <bits/poll.h> directly; include <sys/poll.h> instead."
#endif

/* Event types that can be polled for.  These bits may be set in `events'
   to indicate the interesting event types; they will appear in `revents'
   to indicate the status of the file descriptor.  */
#define POLLIN		0x001		/* There is data to read.  */
#define POLLPRI		0x002		/* There is urgent data to read.  */
#define POLLOUT		0x004		/* Writing now will not block.  */

#ifdef __USE_XOPEN
/* These values are defined in XPG4.2.  */
# define POLLRDNORM	0x040		/* Normal data may be read.  */
# define POLLRDBAND	0x080		/* Priority data may be read.  */
# define POLLWRNORM	POLLOUT		/* Writing now will not block.  */
# define POLLWRBAND	0x100		/* Priority data may be written.  */
#endif

/* Event types always implicitly polled for.  These bits need not be set in
   `events', but they will appear in `revents' to indicate the status of
   the file descriptor.  */
#define POLLERR		0x008		/* Error condition.  */
#define POLLHUP		0x010		/* Hung up.  */
#define POLLNVAL	0x020		/* Invalid polling request.  */

#ifdef __USE_MISC
/* Canonical number of polling requests to read in at a time in poll.  */
# define NPOLLFILE	30
#endif