mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-30 00:31:08 +00:00
80 lines
2.6 KiB
C
80 lines
2.6 KiB
C
/* Compatibility definitions for System V `poll' interface.
|
|
Copyright (C) 1994-2014 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
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef _SYS_POLL_H
|
|
#define _SYS_POLL_H 1
|
|
|
|
#include <features.h>
|
|
|
|
/* Get the platform dependent bits of `poll'. */
|
|
#include <bits/poll.h>
|
|
#ifdef __USE_GNU
|
|
/* Get the __sigset_t definition. */
|
|
# include <bits/sigset.h>
|
|
/* Get the timespec definition. */
|
|
# define __need_timespec
|
|
# include <time.h>
|
|
#endif
|
|
|
|
|
|
/* Type used for the number of file descriptors. */
|
|
typedef unsigned long int nfds_t;
|
|
|
|
/* Data structure describing a polling request. */
|
|
struct pollfd
|
|
{
|
|
int fd; /* File descriptor to poll. */
|
|
short int events; /* Types of events poller cares about. */
|
|
short int revents; /* Types of events that actually occurred. */
|
|
};
|
|
|
|
|
|
__BEGIN_DECLS
|
|
|
|
/* Poll the file descriptors described by the NFDS structures starting at
|
|
FDS. If TIMEOUT is nonzero and not -1, allow TIMEOUT milliseconds for
|
|
an event to occur; if TIMEOUT is -1, block until an event occurs.
|
|
Returns the number of file descriptors with events, zero if timed out,
|
|
or -1 for errors.
|
|
|
|
This function is a cancellation point and therefore not marked with
|
|
__THROW. */
|
|
extern int poll (struct pollfd *__fds, nfds_t __nfds, int __timeout);
|
|
|
|
#ifdef __USE_GNU
|
|
/* Like poll, but before waiting the threads signal mask is replaced
|
|
with that specified in the fourth parameter. For better usability,
|
|
the timeout value is specified using a TIMESPEC object.
|
|
|
|
This function is a cancellation point and therefore not marked with
|
|
__THROW. */
|
|
extern int ppoll (struct pollfd *__fds, nfds_t __nfds,
|
|
const struct timespec *__timeout,
|
|
const __sigset_t *__ss);
|
|
#endif
|
|
|
|
__END_DECLS
|
|
|
|
|
|
/* Define some inlines helping to catch common problems. */
|
|
#if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function
|
|
# include <bits/poll2.h>
|
|
#endif
|
|
|
|
#endif /* sys/poll.h */
|