--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libiberty/getruntime.c	Fri Jul 17 14:47:48 2009 +0900
@@ -0,0 +1,116 @@
+/* Return time used so far, in microseconds.
+   Copyright (C) 1994, 1999, 2002 Free Software Foundation, Inc.
+
+This file is part of the libiberty library.
+Libiberty is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public
+License as published by the Free Software Foundation; either
+version 2 of the License, or (at your option) any later version.
+
+Libiberty 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with libiberty; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
+Boston, MA 02110-1301, USA.  */
+
+#include "config.h"
+
+#include "ansidecl.h"
+#include "libiberty.h"
+
+/* On some systems (such as WindISS), you must include <sys/types.h>
+   to get the definition of "time_t" before you include <time.h>.  */
+#include <sys/types.h>
+
+/* There are several ways to get elapsed execution time; unfortunately no
+   single way is available for all host systems, nor are there reliable
+   ways to find out which way is correct for a given host. */
+
+#ifdef TIME_WITH_SYS_TIME
+# include <sys/time.h>
+# include <time.h>
+#else
+# if HAVE_SYS_TIME_H
+#  include <sys/time.h>
+# else
+#  ifdef HAVE_TIME_H
+#   include <time.h>
+#  endif
+# endif
+#endif
+
+#if defined (HAVE_GETRUSAGE) && defined (HAVE_SYS_RESOURCE_H)
+#include <sys/resource.h>
+#endif
+
+#ifdef HAVE_TIMES
+#ifdef HAVE_SYS_PARAM_H
+#include <sys/param.h>
+#endif
+#include <sys/times.h>
+#endif
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+/* This is a fallback; if wrong, it will likely make obviously wrong
+   results. */
+
+#ifndef CLOCKS_PER_SEC
+#define CLOCKS_PER_SEC 1
+#endif
+
+#ifdef _SC_CLK_TCK
+#define GNU_HZ  sysconf(_SC_CLK_TCK)
+#else
+#ifdef HZ
+#define GNU_HZ  HZ
+#else
+#ifdef CLOCKS_PER_SEC
+#define GNU_HZ  CLOCKS_PER_SEC
+#endif
+#endif
+#endif
+
+/*
+
+@deftypefn Replacement long get_run_time (void)
+
+Returns the time used so far, in microseconds.  If possible, this is
+the time used by this process, else it is the elapsed time since the
+process started.
+
+@end deftypefn
+
+*/
+
+long
+get_run_time (void)
+{
+#if defined (HAVE_GETRUSAGE) && defined (HAVE_SYS_RESOURCE_H)
+  struct rusage rusage;
+
+  getrusage (0, &rusage);
+  return (rusage.ru_utime.tv_sec * 1000000 + rusage.ru_utime.tv_usec
+	  + rusage.ru_stime.tv_sec * 1000000 + rusage.ru_stime.tv_usec);
+#else /* ! HAVE_GETRUSAGE */
+#ifdef HAVE_TIMES
+  struct tms tms;
+
+  times (&tms);
+  return (tms.tms_utime + tms.tms_stime) * (1000000 / GNU_HZ);
+#else /* ! HAVE_TIMES */
+  /* Fall back on clock and hope it's correctly implemented. */
+  const long clocks_per_sec = CLOCKS_PER_SEC;
+  if (clocks_per_sec <= 1000000)
+    return clock () * (1000000 / clocks_per_sec);
+  else
+    return clock () / clocks_per_sec;
+#endif  /* HAVE_TIMES */
+#endif  /* HAVE_GETRUSAGE */
+}