mirror of
git://git.musl-libc.org/musl
synced 2024-12-17 12:14:42 +00:00
c41a76f58c
casting to int would not be correct because high bits could be lost. mapping the high bits down onto low bits would be costlier in the common case where the result is just used in a conditional. changing the type of the bit array elements to int would permute the order of the bit array on 64-bit big endian systems, so that's not an option either.
38 lines
1.0 KiB
C
38 lines
1.0 KiB
C
#ifndef _SYS_SELECT_H
|
|
#define _SYS_SELECT_H
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
#define __NEED_size_t
|
|
#define __NEED_time_t
|
|
#define __NEED_suseconds_t
|
|
#define __NEED_struct_timeval
|
|
#define __NEED_struct_timespec
|
|
#define __NEED_sigset_t
|
|
|
|
#include <bits/alltypes.h>
|
|
|
|
#define FD_SETSIZE 1024
|
|
|
|
typedef unsigned long fd_mask;
|
|
|
|
typedef struct
|
|
{
|
|
unsigned long fds_bits[FD_SETSIZE / 8 / sizeof(long)];
|
|
} fd_set;
|
|
|
|
#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)
|
|
#define FD_SET(d, s) ((s)->fds_bits[(d)/(8*sizeof(long))] |= (1UL<<((d)%(8*sizeof(long)))))
|
|
#define FD_CLR(d, s) ((s)->fds_bits[(d)/(8*sizeof(long))] &= ~(1UL<<((d)%(8*sizeof(long)))))
|
|
#define FD_ISSET(d, s) !!((s)->fds_bits[(d)/(8*sizeof(long))] & (1UL<<((d)%(8*sizeof(long)))))
|
|
|
|
int select (int, fd_set *, fd_set *, fd_set *, struct timeval *);
|
|
int pselect (int, fd_set *, fd_set *, fd_set *, const struct timespec *, const sigset_t *);
|
|
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
#endif
|