1/* poll file descriptors. Hurd version.
2 Copyright (C) 1998-2024 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 <sys/poll.h>
20#include <sys/time.h>
21#include <hurd.h>
22#include <hurd/fd.h>
23
24/* Poll the file descriptors described by the NFDS structures starting at
25 FDS. If TIMEOUT is nonzero and not -1, allow TIMEOUT milliseconds for
26 an event to occur; if TIMEOUT is -1, block until an event occurs.
27 Returns the number of file descriptors with events, zero if timed out,
28 or -1 for errors. */
29
30int
31__poll (struct pollfd *fds, nfds_t nfds, int timeout)
32{
33 struct timespec ts, *to;
34
35 if (timeout < 0)
36 to = NULL;
37 else
38 {
39 ts.tv_sec = timeout / 1000;
40 ts.tv_nsec = (timeout % 1000) * 1000000;
41 to = &ts;
42 }
43
44 return _hurd_select (nfds, fds, NULL, NULL, NULL, to, NULL);
45}
46libc_hidden_def (__poll)
47weak_alias (__poll, poll)
48

source code of glibc/sysdeps/mach/hurd/poll.c