poll.h

 1/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
 2/*
 3 * poll definitions for NOLIBC
 4 * Copyright (C) 2017-2021 Willy Tarreau <w@1wt.eu>
 5 */
 6
 7/* make sure to include all global symbols */
 8#include "nolibc.h"
 9
10#ifndef _NOLIBC_POLL_H
11#define _NOLIBC_POLL_H
12
13#include "arch.h"
14#include "sys.h"
15
16#include <linux/poll.h>
17#include <linux/time.h>
18
19/*
20 * int poll(struct pollfd *fds, int nfds, int timeout);
21 */
22
23static __attribute__((unused))
24int sys_poll(struct pollfd *fds, int nfds, int timeout)
25{
26#if defined(__NR_ppoll)
27	struct timespec t;
28
29	if (timeout >= 0) {
30		t.tv_sec  = timeout / 1000;
31		t.tv_nsec = (timeout % 1000) * 1000000;
32	}
33	return my_syscall5(__NR_ppoll, fds, nfds, (timeout >= 0) ? &t : NULL, NULL, 0);
34#elif defined(__NR_ppoll_time64)
35	struct __kernel_timespec t;
36
37	if (timeout >= 0) {
38		t.tv_sec  = timeout / 1000;
39		t.tv_nsec = (timeout % 1000) * 1000000;
40	}
41	return my_syscall5(__NR_ppoll_time64, fds, nfds, (timeout >= 0) ? &t : NULL, NULL, 0);
42#else
43	return my_syscall3(__NR_poll, fds, nfds, timeout);
44#endif
45}
46
47static __attribute__((unused))
48int poll(struct pollfd *fds, int nfds, int timeout)
49{
50	return __sysret(sys_poll(fds, nfds, timeout));
51}
52
53#endif /* _NOLIBC_POLL_H */