1#include <time.h>
 2#include <errno.h>
 3#include "syscall.h"
 4
 5#define IS32BIT(x) !((x)+0x80000000ULL>>32)
 6
 7int clock_settime(clockid_t clk, const struct timespec *ts)
 8{
 9#ifdef SYS_clock_settime64
10	time_t s = ts->tv_sec;
11	long ns = ts->tv_nsec;
12	int r = -ENOSYS;
13	if (SYS_clock_settime == SYS_clock_settime64 || !IS32BIT(s))
14		r = __syscall(SYS_clock_settime64, clk,
15			((long long[]){s, ns}));
16	if (SYS_clock_settime == SYS_clock_settime64 || r!=-ENOSYS)
17		return __syscall_ret(r);
18	if (!IS32BIT(s))
19		return __syscall_ret(-ENOTSUP);
20	return syscall(SYS_clock_settime, clk, ((long[]){s, ns}));
21#else
22	return syscall(SYS_clock_settime, clk, ts);
23#endif
24}