1#define _BSD_SOURCE
 2#include <poll.h>
 3#include <signal.h>
 4#include <errno.h>
 5#include "syscall.h"
 6
 7#define IS32BIT(x) !((x)+0x80000000ULL>>32)
 8#define CLAMP(x) (int)(IS32BIT(x) ? (x) : 0x7fffffffU+((0ULL+(x))>>63))
 9
10int ppoll(struct pollfd *fds, nfds_t n, const struct timespec *to, const sigset_t *mask)
11{
12	time_t s = to ? to->tv_sec : 0;
13	long ns = to ? to->tv_nsec : 0;
14#ifdef SYS_ppoll_time64
15	int r = -ENOSYS;
16	if (SYS_ppoll == SYS_ppoll_time64 || !IS32BIT(s))
17		r = __syscall_cp(SYS_ppoll_time64, fds, n,
18			to ? ((long long[]){s, ns}) : 0,
19			mask, _NSIG/8);
20	if (SYS_ppoll == SYS_ppoll_time64 || r != -ENOSYS)
21		return __syscall_ret(r);
22	s = CLAMP(s);
23#endif
24	return syscall_cp(SYS_ppoll, fds, n,
25		to ? ((long[]){s, ns}) : 0, mask, _NSIG/8);
26}