sysdeps/unix/sysv/linux/timespec_get.c

   1 /* Copyright (C) 2011-2016 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <time.h>
  19 #include <sysdep.h>
  20 #include <errno.h>
  21
  22 #ifdef HAVE_CLOCK_GETTIME_VSYSCALL
  23 # define HAVE_VSYSCALL
  24 #endif
  25 #include <sysdep-vdso.h>
  26
  27 /* Set TS to calendar time based in time base BASE.  */
  28 int
  29 timespec_get (struct timespec *ts, int base)
  30 {
  31   switch (base)
  32     {
  33       int res;
  34       INTERNAL_SYSCALL_DECL (err);
  35     case TIME_UTC:
  36       res = INTERNAL_VSYSCALL (clock_gettime, err, 2, CLOCK_REALTIME, ts);
  37       if (INTERNAL_SYSCALL_ERROR_P (res, err))
  38         return 0;
  39       break;
  40
  41     default:
  42       return 0;
  43     }
  44
  45   return base;
  46 }