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
23 static __attribute__((unused))
sys_poll(struct pollfd * fds,int nfds,int timeout)24 int 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 #elif defined(__NR_poll)
43 return my_syscall3(__NR_poll, fds, nfds, timeout);
44 #else
45 return __nolibc_enosys(__func__, fds, nfds, timeout);
46 #endif
47 }
48
49 static __attribute__((unused))
poll(struct pollfd * fds,int nfds,int timeout)50 int poll(struct pollfd *fds, int nfds, int timeout)
51 {
52 return __sysret(sys_poll(fds, nfds, timeout));
53 }
54
55 #endif /* _NOLIBC_POLL_H */
56