[PATCH 03/23] linux: Simplify clock_nanosleep

[Lukasz Majewski]

On Mon, 13 Jul 2020 14:10:05 -0300
Adhemerval Zanella via Libc-alpha <libc-alpha@sourceware.org> wrote:

> With arch-syscall.h it can now assumes the existance of either
> __NR_clock_nanosleep or __NR_clock_nanosleep_time64.  The 32-bit
> time_t support is now only build for !__ASSUME_TIME64_SYSCALLS.
> 
> Checked on x86_64-linux-gnu and i686-linux-gnu (on 5.4 and on 4.15
> kernel).

Reviewed-by: Lukasz Majewski <lukma@denx.de>

> ---
>  sysdeps/unix/sysv/linux/clock_nanosleep.c | 33
> ++++++++--------------- 1 file changed, 11 insertions(+), 22
> deletions(-)
> 
> diff --git a/sysdeps/unix/sysv/linux/clock_nanosleep.c
> b/sysdeps/unix/sysv/linux/clock_nanosleep.c index
> cc7a09569d..6ad3321435 100644 ---
> a/sysdeps/unix/sysv/linux/clock_nanosleep.c +++
> b/sysdeps/unix/sysv/linux/clock_nanosleep.c @@ -30,8 +30,6 @@ int
>  __clock_nanosleep_time64 (clockid_t clock_id, int flags, const
> struct __timespec64 *req, struct __timespec64 *rem)
>  {
> -  int r;
> -
>    if (clock_id == CLOCK_THREAD_CPUTIME_ID)
>      return EINVAL;
>    if (clock_id == CLOCK_PROCESS_CPUTIME_ID)
> @@ -39,22 +37,15 @@ __clock_nanosleep_time64 (clockid_t clock_id, int
> flags, const struct __timespec 
>    /* If the call is interrupted by a signal handler or encounters an
> error, it returns a positive value similar to errno.  */
> -#ifdef __ASSUME_TIME64_SYSCALLS
> -# ifndef __NR_clock_nanosleep_time64
> -#  define __NR_clock_nanosleep_time64 __NR_clock_nanosleep
> -# endif
> -  r = INTERNAL_SYSCALL_CANCEL (clock_nanosleep_time64, clock_id,
> -                               flags, req, rem);
> -#else
> -# ifdef __NR_clock_nanosleep_time64
> -  r = INTERNAL_SYSCALL_CANCEL (clock_nanosleep_time64, clock_id,
> -                               flags, req, rem);
> -
> -  if (! INTERNAL_SYSCALL_ERROR_P (r))
> -    return 0;
> -  if (INTERNAL_SYSCALL_ERRNO (r) != ENOSYS)
> -    return INTERNAL_SYSCALL_ERRNO (r);
> -# endif /* __NR_clock_nanosleep_time64 */
> +#ifndef __NR_clock_nanosleep_time64
> +# define __NR_clock_nanosleep_time64 __NR_clock_nanosleep
> +#endif
> +  int r = INTERNAL_SYSCALL_CANCEL (clock_nanosleep_time64, clock_id,
> +				   flags, req, rem);
> +
> +#ifndef __ASSUME_TIME64_SYSCALLS
> +  if (r == 0 || r != -ENOSYS)
> +    return -r;
>  
>    if (! in_time_t_range (req->tv_sec))
>      {
> @@ -68,14 +59,12 @@ __clock_nanosleep_time64 (clockid_t clock_id, int
> flags, const struct __timespec &ts32, &tr32);
>    if (INTERNAL_SYSCALL_ERROR_P (r))
>      {
> -      if (INTERNAL_SYSCALL_ERRNO (r) == EINTR && rem != NULL
> -	  && (flags & TIMER_ABSTIME) == 0)
> +      if (r == -EINTR && rem != NULL && (flags & TIMER_ABSTIME) == 0)
>  	*rem = valid_timespec_to_timespec64 (tr32);
>      }
>  #endif /* __ASSUME_TIME64_SYSCALLS */
>  
> -  return (INTERNAL_SYSCALL_ERROR_P (r)
> -	  ? INTERNAL_SYSCALL_ERRNO (r) : 0);
> +  return -r;
>  }
>  
>  #if __TIMESIZE != 64




Best regards,

Lukasz Majewski

--

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