45 lines
1.2 KiB
C
45 lines
1.2 KiB
C
#include <sys/select.h>
|
|
#include <signal.h>
|
|
#include <stdint.h>
|
|
#include <errno.h>
|
|
#include "syscall.h"
|
|
|
|
#define IS32BIT(x) !((x)+0x80000000ULL>>32)
|
|
#define CLAMP(x) (int)(IS32BIT(x) ? (x) : 0x7fffffffU+((0ULL+(x))>>63))
|
|
|
|
int select(int n, fd_set *restrict rfds, fd_set *restrict wfds, fd_set *restrict efds, struct timeval *restrict tv)
|
|
{
|
|
time_t s = tv ? tv->tv_sec : 0;
|
|
suseconds_t us = tv ? tv->tv_usec : 0;
|
|
long ns;
|
|
const time_t max_time = (1ULL<<8*sizeof(time_t)-1)-1;
|
|
|
|
if (s<0 || us<0) return __syscall_ret(-EINVAL);
|
|
if (us/1000000 > max_time - s) {
|
|
s = max_time;
|
|
us = 999999;
|
|
ns = 999999999;
|
|
} else {
|
|
s += us/1000000;
|
|
us %= 1000000;
|
|
ns = us*1000;
|
|
}
|
|
|
|
#ifdef SYS_pselect6_time64
|
|
int r = -ENOSYS;
|
|
if (SYS_pselect6 == SYS_pselect6_time64 || !IS32BIT(s))
|
|
r = __syscall_cp(SYS_pselect6_time64, n, rfds, wfds, efds,
|
|
tv ? ((long long[]){s, ns}) : 0,
|
|
((syscall_arg_t[]){ 0, _NSIG/8 }));
|
|
if (SYS_pselect6 == SYS_pselect6_time64 || r!=-ENOSYS)
|
|
return __syscall_ret(r);
|
|
#endif
|
|
#ifdef SYS_select
|
|
return syscall_cp(SYS_select, n, rfds, wfds, efds,
|
|
tv ? ((long[]){s, us}) : 0);
|
|
#else
|
|
return syscall_cp(SYS_pselect6, n, rfds, wfds, efds,
|
|
tv ? ((long[]){s, ns}) : 0, ((syscall_arg_t[]){ 0, _NSIG/8 }));
|
|
#endif
|
|
}
|