[thirdparty/glibc.git] / bits / poll.h

/* Copyright (C) 1997-2024 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.  */
Commit	Line	Data
dff8da6b	1	/* Copyright (C) 1997-2024 Free Software Foundation, Inc.
39e16978 UD	2	This file is part of the GNU C Library.
	3
	4	The GNU C Library is free software; you can redistribute it and/or
41bdb6e2 AJ	5	modify it under the terms of the GNU Lesser General Public
	6	License as published by the Free Software Foundation; either
	7	version 2.1 of the License, or (at your option) any later version.
39e16978 UD	8
	9	The GNU C Library is distributed in the hope that it will be useful,
	10	but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
41bdb6e2	12	Lesser General Public License for more details.
39e16978	13
41bdb6e2	14	You should have received a copy of the GNU Lesser General Public
59ba27a6	15	License along with the GNU C Library; if not, see
5a82c748	16	<https://www.gnu.org/licenses/>. */
39e16978	17
f4017d20 UD	18	#ifndef _SYS_POLL_H
	19	# error "Never use <bits/poll.h> directly; include <sys/poll.h> instead."
	20	#endif
39e16978 UD	21
	22	/* Event types that can be polled for. These bits may be set in `events'
	23	to indicate the interesting event types; they will appear in `revents'
	24	to indicate the status of the file descriptor. */
	25	#define POLLIN 01 /* There is data to read. */
	26	#define POLLPRI 02 /* There is urgent data to read. */
	27	#define POLLOUT 04 /* Writing now will not block. */
	28
f282f6b9 UD	29	#if defined __USE_XOPEN \|\| defined __USE_XOPEN2K8
f282f6b9 UD	30	/* These values are defined in XPG4.2 and later. */
8179dcc1 RM	31	# define POLLRDNORM POLLIN /* Normal data may be read. */
	32	# define POLLRDBAND POLLPRI /* Priority data may be read. */
	33	# define POLLWRNORM POLLOUT /* Writing now will not block. */
	34	# define POLLWRBAND POLLOUT /* Priority data may be written. */
	35	#endif
39e16978 UD	36
	37	/* Event types always implicitly polled for. These bits need not be set in
	38	`events', but they will appear in `revents' to indicate the status of
	39	the file descriptor. */
	40	#define POLLERR 010 /* Error condition. */
	41	#define POLLHUP 020 /* Hung up. */
	42	#define POLLNVAL 040 /* Invalid polling request. */