sysdeps/unix/sysv/linux/timespec_get.c

   1 /* timespec_get -- get system time - Linux version supporting 64 bit time.
   2    Copyright (C) 2020-2024 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, or (at your option) any later version.
   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 #include <errno.h>
  21
  22 /* Set TS to calendar time based in time base BASE.  */
  23 int
  24 __timespec_get64 (struct __timespec64 *ts, int base)
  25 {
  26   if (base == TIME_UTC)
  27     {
  28       __clock_gettime64 (CLOCK_REALTIME, ts);
  29       return base;
  30     }
  31   return 0;
  32 }
  33
  34 #if __TIMESIZE != 64
  35 libc_hidden_def (__timespec_get64)
  36
  37 int
  38 __timespec_get (struct timespec *ts, int base)
  39 {
  40   int ret;
  41   struct __timespec64 tp64;
  42
  43   ret = __timespec_get64 (&tp64, base);
  44
  45   if (ret == TIME_UTC)
  46     {
  47       if (! in_time_t_range (tp64.tv_sec))
  48         {
  49           __set_errno (EOVERFLOW);
  50           return 0;
  51         }
  52
  53       *ts = valid_timespec64_to_timespec (tp64);
  54     }
  55
  56   return ret;
  57 }
  58 #endif
  59 strong_alias (__timespec_get, timespec_get);