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} 33