/* Compatibility definitions for System V `poll' interface.
Copyright (C) 1994,1996-2001,2004,2005,2006 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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */

#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

#endif /* sys/poll.h */