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