1#include <time.h>
 2#include <limits.h>
 3#include "pthread_impl.h"
 4
 5#define IS32BIT(x) !((x)+0x80000000ULL>>32)
 6
 7int timer_settime(timer_t t, int flags, const struct itimerspec *restrict val, struct itimerspec *restrict old)
 8{
 9	if ((intptr_t)t < 0) {
10		pthread_t td = (void *)((uintptr_t)t << 1);
11		t = (void *)(uintptr_t)(td->timer_id & INT_MAX);
12	}
13#ifdef SYS_timer_settime64
14	time_t is = val->it_interval.tv_sec, vs = val->it_value.tv_sec;
15	long ins = val->it_interval.tv_nsec, vns = val->it_value.tv_nsec;
16	int r = -ENOSYS;
17	if (SYS_timer_settime == SYS_timer_settime64
18	    || !IS32BIT(is) || !IS32BIT(vs) || (sizeof(time_t)>4 && old))
19		r = __syscall(SYS_timer_settime64, t, flags,
20			((long long[]){is, ins, vs, vns}), old);
21	if (SYS_timer_settime == SYS_timer_settime64 || r!=-ENOSYS)
22		return __syscall_ret(r);
23	if (!IS32BIT(is) || !IS32BIT(vs))
24		return __syscall_ret(-ENOTSUP);
25	long old32[4];
26	r = __syscall(SYS_timer_settime, t, flags,
27		((long[]){is, ins, vs, vns}), old32);
28	if (!r && old) {
29		old->it_interval.tv_sec = old32[0];
30		old->it_interval.tv_nsec = old32[1];
31		old->it_value.tv_sec = old32[2];
32		old->it_value.tv_nsec = old32[3];
33	}
34	return __syscall_ret(r);
35#endif
36	return syscall(SYS_timer_settime, t, flags, val, old);
37}