mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-02 09:40:13 +00:00
79 lines
2.1 KiB
C
79 lines
2.1 KiB
C
/* Copyright (C) 2006-2015 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;
|
|
|
|
if (SINGLE_THREAD_P)
|
|
result = INLINE_SYSCALL (ppoll, 5, fds, nfds, timeout, sigmask, _NSIG / 8);
|
|
else
|
|
{
|
|
int oldtype = LIBC_CANCEL_ASYNC ();
|
|
|
|
result = INLINE_SYSCALL (ppoll, 5, fds, nfds, timeout, sigmask,
|
|
_NSIG / 8);
|
|
|
|
LIBC_CANCEL_RESET (oldtype);
|
|
}
|
|
|
|
# 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
|