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/* Copyright (C) 2006-2016 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2006.
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/>. */
#include <errno.h>
#include <signal.h>
#include <time.h>
#include <sys/poll.h>
#include <kernel-features.h>
#include <sysdep-cancel.h>
#ifdef __NR_ppoll
# ifndef __ASSUME_PPOLL
static int __generic_ppoll (struct pollfd *fds, nfds_t nfds,
const struct timespec *timeout,
const sigset_t *sigmask);
# endif
int
ppoll (struct pollfd *fds, nfds_t nfds, const struct timespec *timeout,
const sigset_t *sigmask)
{
/* The Linux kernel can in some situations update the timeout value.
We do not want that so use a local variable. */
struct timespec tval;
if (timeout != NULL)
{
tval = *timeout;
timeout = &tval;
}
int result;
result = SYSCALL_CANCEL (ppoll, fds, nfds, timeout, sigmask, _NSIG / 8);
# ifndef __ASSUME_PPOLL
if (result == -1 && errno == ENOSYS)
result = __generic_ppoll (fds, nfds, timeout, sigmask);
# endif
return result;
}
libc_hidden_def (ppoll)
# ifndef __ASSUME_PPOLL
# define ppoll static __generic_ppoll
# endif
#endif
#ifndef __ASSUME_PPOLL
# include <io/ppoll.c>
#endif
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