1 files changed, 118 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/posix/clock_getres.c b/REORG.TODO/sysdeps/posix/clock_getres.c
new file mode 100644
index 0000000000..b6248bef2c
--- /dev/null
+++ b/REORG.TODO/sysdeps/posix/clock_getres.c
@@ -0,0 +1,118 @@
+/* clock_getres -- Get the resolution of a POSIX clockid_t.
+   Copyright (C) 1999-2017 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, or (at your option) any later version.
+
+   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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <stdint.h>
+#include <time.h>
+#include <unistd.h>
+#include <sys/param.h>
+#include <libc-internal.h>
+
+
+#if HP_TIMING_AVAIL
+static long int nsec;		/* Clock frequency of the processor.  */
+
+static int
+hp_timing_getres (struct timespec *res)
+{
+  if (__glibc_unlikely (nsec == 0))
+    {
+      hp_timing_t freq;
+
+      /* This can only happen if we haven't initialized the `nsec'
+	 variable yet.  Do this now.  We don't have to protect this
+	 code against multiple execution since all of them should
+	 lead to the same result.  */
+      freq = __get_clockfreq ();
+      if (__glibc_unlikely (freq == 0))
+	/* Something went wrong.  */
+	return -1;
+
+      nsec = MAX (UINT64_C (1000000000) / freq, 1);
+    }
+
+  /* Fill in the values.
+     The seconds are always zero (unless we have a 1Hz machine).  */
+  res->tv_sec = 0;
+  res->tv_nsec = nsec;
+
+  return 0;
+}
+#endif
+
+static inline int
+realtime_getres (struct timespec *res)
+{
+  long int clk_tck = sysconf (_SC_CLK_TCK);
+
+  if (__glibc_likely (clk_tck != -1))
+    {
+      /* This implementation assumes that the realtime clock has a
+	 resolution higher than 1 second.  This is the case for any
+	 reasonable implementation.  */
+      res->tv_sec = 0;
+      res->tv_nsec = 1000000000 / clk_tck;
+      return 0;
+    }
+
+  return -1;
+}
+
+
+/* Get resolution of clock.  */
+int
+__clock_getres (clockid_t clock_id, struct timespec *res)
+{
+  int retval = -1;
+
+  switch (clock_id)
+    {
+#ifdef SYSDEP_GETRES
+      SYSDEP_GETRES;
+#endif
+
+#ifndef HANDLED_REALTIME
+    case CLOCK_REALTIME:
+      retval = realtime_getres (res);
+      break;
+#endif	/* handled REALTIME */
+
+    default:
+#ifdef SYSDEP_GETRES_CPU
+      SYSDEP_GETRES_CPU;
+#endif
+#if HP_TIMING_AVAIL
+      if ((clock_id & ((1 << CLOCK_IDFIELD_SIZE) - 1))
+	  == CLOCK_THREAD_CPUTIME_ID)
+	retval = hp_timing_getres (res);
+      else
+#endif
+	__set_errno (EINVAL);
+      break;
+
+#if HP_TIMING_AVAIL && !defined HANDLED_CPUTIME
+    case CLOCK_PROCESS_CPUTIME_ID:
+    case CLOCK_THREAD_CPUTIME_ID:
+      retval = hp_timing_getres (res);
+      break;
+#endif
+    }
+
+  return retval;
+}
+weak_alias (__clock_getres, clock_getres)