Implement timespec_get

sysdeps/unix/sysv/linux/timespec_get.c

@@ -0,0 +1,57 @@
+/* Copyright (C) 2011 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <time.h>
+#include <sysdep.h>
+#include <kernel-features.h>
+
+#ifndef HAVE_CLOCK_GETTIME_VSYSCALL
+# undef INTERNAL_VSYSCALL
+# define INTERNAL_VSYSCALL INTERNAL_SYSCALL
+#else
+# include <bits/libc-vdso.h>
+#endif
+
+#ifndef INTERNAL_GETTIME
+# define INTERNAL_GETTIME(id, tp) \
+  INTERNAL_VSYSCALL (clock_gettime, err, 2, id, tp)
+#endif
+
+
+/* Set TS to calendar time based in time base BASE.  */
+int
+timespec_get (ts, base)
+     struct timespec *ts;
+     int base;
+{
+  switch (base)
+    {
+      int res;
+      INTERNAL_SYSCALL_DECL (err);
+    case TIME_UTC:
+      res = INTERNAL_GETTIME (CLOCK_REALTIME, ts);
+      if (INTERNAL_SYSCALL_ERROR_P (res, err))
+	return 0;
+      break;
+
+    default:
+      return 0;
+    }
+
+  return base;
+}