Contributors: 6
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Willy Tarreau |
335 |
87.01% |
8 |
50.00% |
| Mark Brown |
24 |
6.23% |
3 |
18.75% |
| Sven Schnelle |
15 |
3.90% |
1 |
6.25% |
| Zhangjin Wu |
9 |
2.34% |
2 |
12.50% |
| Feiyang Chen |
1 |
0.26% |
1 |
6.25% |
| Thomas Weißschuh |
1 |
0.26% |
1 |
6.25% |
| Total |
385 |
|
16 |
|
/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
#include "../nolibc.h"
#ifndef _NOLIBC_SYS_SELECT_H
#define _NOLIBC_SYS_SELECT_H
#include <linux/time.h>
#include <linux/unistd.h>
/* commonly an fd_set represents 256 FDs */
#ifndef FD_SETSIZE
#define FD_SETSIZE 256
#endif
#define FD_SETIDXMASK (8 * sizeof(unsigned long))
#define FD_SETBITMASK (8 * sizeof(unsigned long)-1)
/* for select() */
typedef struct {
unsigned long fds[(FD_SETSIZE + FD_SETBITMASK) / FD_SETIDXMASK];
} fd_set;
#define FD_CLR(fd, set) do { \
fd_set *__set = (set); \
int __fd = (fd); \
if (__fd >= 0) \
__set->fds[__fd / FD_SETIDXMASK] &= \
~(1U << (__fd & FD_SETBITMASK)); \
} while (0)
#define FD_SET(fd, set) do { \
fd_set *__set = (set); \
int __fd = (fd); \
if (__fd >= 0) \
__set->fds[__fd / FD_SETIDXMASK] |= \
1 << (__fd & FD_SETBITMASK); \
} while (0)
#define FD_ISSET(fd, set) ({ \
fd_set *__set = (set); \
int __fd = (fd); \
int __r = 0; \
if (__fd >= 0) \
__r = !!(__set->fds[__fd / FD_SETIDXMASK] & \
1U << (__fd & FD_SETBITMASK)); \
__r; \
})
#define FD_ZERO(set) do { \
fd_set *__set = (set); \
int __idx; \
int __size = (FD_SETSIZE+FD_SETBITMASK) / FD_SETIDXMASK;\
for (__idx = 0; __idx < __size; __idx++) \
__set->fds[__idx] = 0; \
} while (0)
/*
* int select(int nfds, fd_set *read_fds, fd_set *write_fds,
* fd_set *except_fds, struct timeval *timeout);
*/
static __attribute__((unused))
int sys_select(int nfds, fd_set *rfds, fd_set *wfds, fd_set *efds, struct timeval *timeout)
{
#if defined(__ARCH_WANT_SYS_OLD_SELECT) && !defined(__NR__newselect)
struct sel_arg_struct {
unsigned long n;
fd_set *r, *w, *e;
struct timeval *t;
} arg = { .n = nfds, .r = rfds, .w = wfds, .e = efds, .t = timeout };
return my_syscall1(__NR_select, &arg);
#elif defined(__NR__newselect)
return my_syscall5(__NR__newselect, nfds, rfds, wfds, efds, timeout);
#elif defined(__NR_select)
return my_syscall5(__NR_select, nfds, rfds, wfds, efds, timeout);
#elif defined(__NR_pselect6)
struct timespec t;
if (timeout) {
t.tv_sec = timeout->tv_sec;
t.tv_nsec = timeout->tv_usec * 1000;
}
return my_syscall6(__NR_pselect6, nfds, rfds, wfds, efds, timeout ? &t : NULL, NULL);
#else
struct __kernel_timespec t;
if (timeout) {
t.tv_sec = timeout->tv_sec;
t.tv_nsec = timeout->tv_usec * 1000;
}
return my_syscall6(__NR_pselect6_time64, nfds, rfds, wfds, efds, timeout ? &t : NULL, NULL);
#endif
}
static __attribute__((unused))
int select(int nfds, fd_set *rfds, fd_set *wfds, fd_set *efds, struct timeval *timeout)
{
return __sysret(sys_select(nfds, rfds, wfds, efds, timeout));
}
#endif /* _NOLIBC_SYS_SELECT_H */