Re: [RFC v3 01/23] sysdeps/nanosleep: Use clock_nanosleep_time64 if avaliable

[Florian Weimer <fweimer at redhat dot com>]

* Alistair Francis:

> +#if __TIMESIZE == 32
> +struct timespec64
> +{
> +  long int tv_sec;   /* Seconds.  */
> +  long int tv_nsec;  /* Nanoseconds.  */
> +};
> +#endif
> +
>  int
>  thrd_sleep (const struct timespec* time_point, struct timespec* remaining)
>  {
>    INTERNAL_SYSCALL_DECL (err);
> -  int ret = INTERNAL_SYSCALL_CANCEL (nanosleep, err, time_point, remaining);
> +  int ret;
> +
> +#ifdef __ASSUME_TIME64_SYSCALLS
> +  ret = INTERNAL_SYSCALL_CANCEL (clock_nanosleep_time64, err, CLOCK_REALTIME,
> +                                 0, time_point, remaining);
> +#else
> +# ifdef __NR_clock_nanosleep_time64
> +#  if __TIMESIZE == 64
> +  long int ret_64;
> +
> +  ret_64 = INTERNAL_SYSCALL_CANCEL (clock_nanosleep_time64, err, CLOCK_REALTIME,
> +                                    0, time_point, remaining);
> +
> +  if (ret_64 == 0 || errno != ENOSYS)
> +    ret = ret_64;
> +#  else
> +  timespec64 ts;
> +
> +  ret = INTERNAL_SYSCALL_CANCEL (clock_nanosleep_time64, err,
> +                                 CLOCK_REALTIME, 0, time_point,
> +                                 ts);
> +
> +  if (ret == 0 || errno != ENOSYS) {
> +    remaining->tv_sec = ts.tv_sec;
> +    remaining->tv_nsec = ts.tv_nsec;
> +    return ret;
> +  }
> +#  endif
> +# endif
> +  ret =  INTERNAL_SYSCALL_CANCEL (nanosleep, err, time_point, remaining);
> +#endif
> +

I think this changes the ABI of thrd_sleep if
__NR_clock_nanosleep_time64 is defined (and __NR_nanosleep was defined
before).

Thanks,
Florian