1 | /* Copyright (C) 2006-2016 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
3 | Contributed by Ulrich Drepper <drepper@redhat.com>, 2006. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <errno.h> |
20 | #include <signal.h> |
21 | #include <time.h> |
22 | #include <sys/poll.h> |
23 | #include <kernel-features.h> |
24 | #include <sysdep-cancel.h> |
25 | |
26 | |
27 | #ifdef __NR_ppoll |
28 | # ifndef __ASSUME_PPOLL |
29 | static int __generic_ppoll (struct pollfd *fds, nfds_t nfds, |
30 | const struct timespec *timeout, |
31 | const sigset_t *sigmask); |
32 | # endif |
33 | |
34 | |
35 | int |
36 | ppoll (struct pollfd *fds, nfds_t nfds, const struct timespec *timeout, |
37 | const sigset_t *sigmask) |
38 | { |
39 | /* The Linux kernel can in some situations update the timeout value. |
40 | We do not want that so use a local variable. */ |
41 | struct timespec tval; |
42 | if (timeout != NULL) |
43 | { |
44 | tval = *timeout; |
45 | timeout = &tval; |
46 | } |
47 | |
48 | int result; |
49 | |
50 | result = SYSCALL_CANCEL (ppoll, fds, nfds, timeout, sigmask, _NSIG / 8); |
51 | |
52 | # ifndef __ASSUME_PPOLL |
53 | if (result == -1 && errno == ENOSYS) |
54 | result = __generic_ppoll (fds, nfds, timeout, sigmask); |
55 | # endif |
56 | |
57 | return result; |
58 | } |
59 | libc_hidden_def (ppoll) |
60 | |
61 | # ifndef __ASSUME_PPOLL |
62 | # define ppoll static __generic_ppoll |
63 | # endif |
64 | #endif |
65 | |
66 | #ifndef __ASSUME_PPOLL |
67 | # include <io/ppoll.c> |
68 | #endif |
69 | |