1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
|
/* 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
|
