include/sys/select.h

   1 #ifndef _SYS_SELECT_H
   2 #define _SYS_SELECT_H
   3 #ifdef __cplusplus
   4 extern "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
  20 typedef unsigned long fd_mask;
  21
  22 typedef struct {
  23         unsigned long fds_bits[FD_SETSIZE / 8 / sizeof(long)];
  24 } fd_set;
  25
  26 #define FD_ZERO(s) do { int __i; unsigned long *__b=(s)->fds_bits; for(__i=sizeof (fd_set)/sizeof (long); __i; __i--) *__b++=0; } while(0)
  27 #define FD_SET(d, s)   ((s)->fds_bits[(d)/(8*sizeof(long))] |= (1UL<<((d)%(8*sizeof(long)))))
  28 #define FD_CLR(d, s)   ((s)->fds_bits[(d)/(8*sizeof(long))] &= ~(1UL<<((d)%(8*sizeof(long)))))
  29 #define FD_ISSET(d, s) !!((s)->fds_bits[(d)/(8*sizeof(long))] & (1UL<<((d)%(8*sizeof(long)))))
  30
  31 int select (int, fd_set *__restrict, fd_set *__restrict, fd_set *__restrict, struct timeval *__restrict);
  32 int pselect (int, fd_set *__restrict, fd_set *__restrict, fd_set *__restrict, const struct timespec *__restrict, const sigset_t *__restrict);
  33
  34 #if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
  35 #define NFDBITS (8*(int)sizeof(long))
  36 #endif
  37
  38 #ifdef __cplusplus
  39 }
  40 #endif
  41 #endif