1#include <sys/time.h>
 2#include <errno.h>
 3#include "syscall.h"
 4
 5#define IS32BIT(x) !((x)+0x80000000ULL>>32)
 6
 7int setitimer(int which, const struct itimerval *restrict new, struct itimerval *restrict old)
 8{
 9	if (sizeof(time_t) > sizeof(long)) {
10		time_t is = new->it_interval.tv_sec, vs = new->it_value.tv_sec;
11		long ius = new->it_interval.tv_usec, vus = new->it_value.tv_usec;
12		if (!IS32BIT(is) || !IS32BIT(vs))
13			return __syscall_ret(-ENOTSUP);
14		long old32[4];
15		int r = __syscall(SYS_setitimer, which,
16			((long[]){is, ius, vs, vus}), old32);
17		if (!r && old) {
18			old->it_interval.tv_sec = old32[0];
19			old->it_interval.tv_usec = old32[1];
20			old->it_value.tv_sec = old32[2];
21			old->it_value.tv_usec = old32[3];
22		}
23		return __syscall_ret(r);
24	}
25	return syscall(SYS_setitimer, which, new, old);
26}