github.com/afumu/libc@v0.0.6/musl/include/sys/select.h (about)

     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  #if _REDIR_TIME64
    39  __REDIR(select, __select_time64);
    40  __REDIR(pselect, __pselect_time64);
    41  #endif
    42  
    43  #ifdef __cplusplus
    44  }
    45  #endif
    46  #endif