1/* Linux poll implementation.
2 Copyright (C) 2017-2022 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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 <https://www.gnu.org/licenses/>. */
18
19#include <errno.h>
20#include <sys/poll.h>
21
22#include <sysdep-cancel.h>
23#include <sys/syscall.h>
24
25int
26__poll (struct pollfd *fds, nfds_t nfds, int timeout)
27{
28#ifdef __NR_poll
29 return SYSCALL_CANCEL (poll, fds, nfds, timeout);
30#else
31 struct timespec timeout_ts;
32 struct timespec *timeout_ts_p = NULL;
33
34 if (timeout >= 0)
35 {
36 timeout_ts.tv_sec = timeout / 1000;
37 timeout_ts.tv_nsec = (timeout % 1000) * 1000000;
38 timeout_ts_p = &timeout_ts;
39 }
40
41 return SYSCALL_CANCEL (ppoll, fds, nfds, timeout_ts_p, NULL, 0);
42#endif
43}
44libc_hidden_def (__poll)
45weak_alias (__poll, poll)
46strong_alias (__poll, __libc_poll)
47