2009-12-17 Rafael Avila de Espindola <espindola@google.com>

	* Makefile.am (CCFILES): Add timer.cc.
	(HFILES): Add timer.h.
	* configure.ac: Check for sysconf and times.
	* main.cc: include timer.h.
	(main): Use Timer instead of get_run_time.
	* timer.cc: New.
	* timer.h: New.
	* workqueue.cc: include timer.h.
	(Workqueue::find_and_run_task):
	Report user, sys and wall time.
	* Makefile.in: Regenerate.
	* config.in: Regenerate.
	* configure: Regenerate.

1 files changed, 107 insertions, 0 deletions

diff --git a/gold/timer.cc b/gold/timer.cc
new file mode 100644
index 0000000..ec51bc9
--- /dev/null
+++ b/gold/timer.cc
@@ -0,0 +1,107 @@
+// timer.cc -- helper class for time accounting
+
+// Copyright 2009 Free Software Foundation, Inc.
+// Written by Rafael Avila de Espindola <espindola@google.com>.
+
+// This file is part of gold.
+
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 3 of the License, or
+// (at your option) any later version.
+
+// This program 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 General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+// MA 02110-1301, USA.
+
+#include "gold.h"
+
+#include <sys/times.h>
+
+#include "libiberty.h"
+
+#include "timer.h"
+
+namespace gold
+{
+
+// Class Timer
+
+Timer::Timer()
+{
+  this->start_time_.wall = 0;
+  this->start_time_.user = 0;
+  this->start_time_.sys = 0;
+}
+
+// Start couting the time.
+void
+Timer::start ()
+{
+  this->get_time(&this->start_time_);
+}
+
+#if HAVE_SYSCONF && defined _SC_CLK_TCK
+# define TICKS_PER_SECOND sysconf (_SC_CLK_TCK) /* POSIX 1003.1-1996 */
+#else
+# ifdef CLK_TCK
+#  define TICKS_PER_SECOND CLK_TCK /* POSIX 1003.1-1988; obsolescent */
+# else
+#  ifdef HZ
+#   define TICKS_PER_SECOND HZ  /* traditional UNIX */
+#  else
+#   define TICKS_PER_SECOND 100 /* often the correct value */
+#  endif
+# endif
+#endif
+
+// times returns statistics in clock_t units. This variable will hold the
+// conversion factor to seconds. We use a variable that is initialize once
+// because sysconf can be slow.
+static long ticks_per_sec;
+class Timer_init
+{
+ public:
+  Timer_init()
+  {
+    ticks_per_sec = TICKS_PER_SECOND;
+  }
+};
+Timer_init timer_init;
+
+// Write the current time infortamion.
+void
+Timer::get_time (TimeStats *now)
+{
+#ifdef HAVE_TIMES
+  tms t;
+  now->wall = (times(&t) * 1000) / ticks_per_sec;
+  now->user = (t.tms_utime * 1000) / ticks_per_sec;
+  now->sys  = (t.tms_stime * 1000) / ticks_per_sec;
+#else
+  now->wall = get_run_time() / 1000;
+  now->user = 0;
+  now->sys = 0;
+#endif
+}
+
+// Return the stats since start was called.
+Timer::TimeStats
+Timer::get_elapsed_time ()
+{
+  TimeStats now;
+  this->get_time(&now);
+  TimeStats delta;
+  delta.wall = now.wall - this->start_time_.wall;
+  delta.user = now.user - this->start_time_.user;
+  delta.sys = now.sys - this->start_time_.sys;
+  return delta;
+}
+
+}