mirror of
git://sourceware.org/git/glibc.git
synced 2024-11-21 01:12:26 +08:00
43 lines
2.0 KiB
C
43 lines
2.0 KiB
C
/* Copyright (C) 1997-2023 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 Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#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 01 /* There is data to read. */
|
|
#define POLLPRI 02 /* There is urgent data to read. */
|
|
#define POLLOUT 04 /* Writing now will not block. */
|
|
|
|
#if defined __USE_XOPEN || defined __USE_XOPEN2K8
|
|
/* These values are defined in XPG4.2 and later. */
|
|
# define POLLRDNORM POLLIN /* Normal data may be read. */
|
|
# define POLLRDBAND POLLPRI /* Priority data may be read. */
|
|
# define POLLWRNORM POLLOUT /* Writing now will not block. */
|
|
# define POLLWRBAND POLLOUT /* 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 010 /* Error condition. */
|
|
#define POLLHUP 020 /* Hung up. */
|
|
#define POLLNVAL 040 /* Invalid polling request. */
|