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 #ifdef __LITEOS__ 28 #define FD_SET(d, s) ((s)->fds_bits[(d)/(8*sizeof(long))] |= (1UL<<((d)%(8*sizeof(long))))) 29 #define FD_CLR(d, s) ((s)->fds_bits[(d)/(8*sizeof(long))] &= ~(1UL<<((d)%(8*sizeof(long))))) 30 #define FD_ISSET(d, s) !!((s)->fds_bits[(d)/(8*sizeof(long))] & (1UL<<((d)%(8*sizeof(long))))) 31 #else 32 void __fd_chk(int fd); 33 34 #define FD_SET(d, s) do { __fd_chk(d); ((s)->fds_bits[(d)/(8*sizeof(long))] |= (1UL<<((d)%(8*sizeof(long))))); } while(0) 35 #define FD_CLR(d, s) do { __fd_chk(d); ((s)->fds_bits[(d)/(8*sizeof(long))] &= ~(1UL<<((d)%(8*sizeof(long))))); } while(0) 36 #define FD_ISSET(d, s) (0 <= (d) && (d) < FD_SETSIZE && (!!((s)->fds_bits[(d)/(8*sizeof(long))] & (1UL<<((d)%(8*sizeof(long))))))) 37 #endif 38 39 int select (int, fd_set *__restrict, fd_set *__restrict, fd_set *__restrict, struct timeval *__restrict); 40 int pselect (int, fd_set *__restrict, fd_set *__restrict, fd_set *__restrict, const struct timespec *__restrict, const sigset_t *__restrict); 41 42 #if defined(_GNU_SOURCE) || defined(_BSD_SOURCE) 43 #define NFDBITS (8*(int)sizeof(long)) 44 #endif 45 46 #if _REDIR_TIME64 47 __REDIR(select, __select_time64); 48 __REDIR(pselect, __pselect_time64); 49 #endif 50 51 #ifdef __cplusplus 52 } 53 #endif 54 #endif 55