1#include <signal.h>
2#include <errno.h>
3#include "syscall.h"
4
5#define IS32BIT(x) !((x)+0x80000000ULL>>32)
6#define CLAMP(x) (int)(IS32BIT(x) ? (x) : 0x7fffffffU+((0ULL+(x))>>63))
7
8static int do_sigtimedwait(const sigset_t *restrict mask, siginfo_t *restrict si, const struct timespec *restrict ts)
9{
10#ifdef SYS_rt_sigtimedwait_time64
11 time_t s = ts ? ts->tv_sec : 0;
12 long ns = ts ? ts->tv_nsec : 0;
13 int r = -ENOSYS;
14 if (SYS_rt_sigtimedwait == SYS_rt_sigtimedwait_time64 || !IS32BIT(s))
15 r = __syscall_cp(SYS_rt_sigtimedwait_time64, mask, si,
16 ts ? ((long long[]){s, ns}) : 0, _NSIG/8);
17 if (SYS_rt_sigtimedwait == SYS_rt_sigtimedwait_time64 || r!=-ENOSYS)
18 return r;
19 return __syscall_cp(SYS_rt_sigtimedwait, mask, si,
20 ts ? ((long[]){CLAMP(s), ns}) : 0, _NSIG/8);;
21#else
22 return __syscall_cp(SYS_rt_sigtimedwait, mask, si, ts, _NSIG/8);
23#endif
24}
25
26int sigtimedwait(const sigset_t *restrict mask, siginfo_t *restrict si, const struct timespec *restrict timeout)
27{
28 int ret;
29 do ret = do_sigtimedwait(mask, si, timeout);
30 while (ret==-EINTR);
31 return __syscall_ret(ret);
32}