1  /* Get resolution of a time base.
       2     Copyright (C) 2021-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <time.h>
      20  
      21  /* Set TS to resolution of time base BASE.  */
      22  int
      23  __timespec_getres64 (struct __timespec64 *ts, int base)
      24  {
      25    if (base == TIME_UTC)
      26      {
      27        __clock_getres64 (CLOCK_REALTIME, ts);
      28        return base;
      29      }
      30    return 0;
      31  }
      32  
      33  #if __TIMESIZE != 64
      34  libc_hidden_def (__timespec_getres64)
      35  
      36  int
      37  __timespec_getres (struct timespec *ts, int base)
      38  {
      39    int ret;
      40    struct __timespec64 tp64;
      41  
      42    ret = __timespec_getres64 (&tp64, base);
      43  
      44    if (ret == TIME_UTC && ts != NULL)
      45      *ts = valid_timespec64_to_timespec (tp64);
      46  
      47    return ret;
      48  }
      49  #endif
      50  strong_alias (__timespec_getres, timespec_getres);