src/share/vm/runtime/timer.hpp

rev 7854 : imported patch 8027962-per-phase-timing-measurements-for-strong-roots-processing
rev 7855 : [mq]: 8027962-bengt-suggestions

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.

@@ -101,10 +101,27 @@
   // Activation
   void suspend()  { if (_active) _t.stop();  }
   void resume()   { if (_active) _t.start(); }
 };
 
+class PhaseTimeData : public StackObj {
+public:
+  virtual bool active() const = 0;
+  virtual void set_value(uint phase, double value) = 0;
+};
+
+class TrackPhaseTime : public StackObj {
+ private:
+  PhaseTimeData* _data;
+  uint           _phase;
+  jlong          _last;
+ public:
+  // Constructors
+  TrackPhaseTime(PhaseTimeData *data, uint phase);
+  ~TrackPhaseTime();
+};
+
 class TraceCPUTime: public StackObj {
  private:
   bool _active;                 // true if times will be measured and printed
   bool _print_cr;               // if true print carriage return at end
   double _starting_user_time;   // user time at start of measurement