1#pragma once
2
3#ifdef __cplusplus
4extern "C" {
5#endif
6
7#include <features.h>
8
9#define __NEED_size_t
10#define __NEED_time_t
11#define __NEED_suseconds_t
12#define __NEED_struct_timeval
13#define __NEED_struct_timespec
14#define __NEED_sigset_t
15
16#include <bits/alltypes.h>
17
18#define FD_SETSIZE 1024
19
20typedef unsigned long fd_mask;
21
22typedef struct { unsigned long fds_bits[FD_SETSIZE / 8 / sizeof(long)]; } fd_set;
23
24#define FD_ZERO(s)                                            \
25    do {                                                      \
26        int __i;                                              \
27        unsigned long* __b = (s)->fds_bits;                   \
28        for (__i = sizeof(fd_set) / sizeof(long); __i; __i--) \
29            *__b++ = 0;                                       \
30    } while (0)
31#define FD_SET(d, s) \
32    ((s)->fds_bits[(d) / (8 * sizeof(long))] |= (1UL << ((d) % (8 * sizeof(long)))))
33#define FD_CLR(d, s) \
34    ((s)->fds_bits[(d) / (8 * sizeof(long))] &= ~(1UL << ((d) % (8 * sizeof(long)))))
35#define FD_ISSET(d, s) \
36    !!((s)->fds_bits[(d) / (8 * sizeof(long))] & (1UL << ((d) % (8 * sizeof(long)))))
37
38int select(int, fd_set* __restrict, fd_set* __restrict, fd_set* __restrict,
39           struct timeval* __restrict);
40int pselect(int, fd_set* __restrict, fd_set* __restrict, fd_set* __restrict,
41            const struct timespec* __restrict, const sigset_t* __restrict);
42
43#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
44#define NFDBITS (8 * (int)sizeof(long))
45#endif
46
47#ifdef __cplusplus
48}
49#endif
50