sysdeps/unix/sysv/linux/timespec_get.c

   1 /* Copyright (C) 2011 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, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #include <time.h>
  20 #include <sysdep.h>
  21 #include <kernel-features.h>
  22
  23 #ifndef HAVE_CLOCK_GETTIME_VSYSCALL
  24 # undef INTERNAL_VSYSCALL
  25 # define INTERNAL_VSYSCALL INTERNAL_SYSCALL
  26 #else
  27 # include <bits/libc-vdso.h>
  28 #endif
  29
  30 #ifndef INTERNAL_GETTIME
  31 # define INTERNAL_GETTIME(id, tp) \
  32   INTERNAL_VSYSCALL (clock_gettime, err, 2, id, tp)
  33 #endif
  34
  35
  36 /* Set TS to calendar time based in time base BASE.  */
  37 int
  38 timespec_get (ts, base)
  39      struct timespec *ts;
  40      int base;
  41 {
  42   switch (base)
  43     {
  44       int res;
  45       INTERNAL_SYSCALL_DECL (err);
  46     case TIME_UTC:
  47       res = INTERNAL_GETTIME (CLOCK_REALTIME, ts);
  48       if (INTERNAL_SYSCALL_ERROR_P (res, err))
  49         return 0;
  50       break;
  51
  52     default:
  53       return 0;
  54     }
  55
  56   return base;
  57 }