--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/gc/g1/workerDataArray.hpp	Thu Oct 29 14:58:44 2015 +0100
@@ -0,0 +1,94 @@
+/*
+ * Copyright (c) 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.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#include "memory/allocation.hpp"
+#include "utilities/debug.hpp"
+
+template <class T>
+class WorkerDataArray  : public CHeapObj<mtGC> {
+  friend class G1GCParPhasePrinter;
+  T*          _data;
+  uint        _length;
+  const char* _title;
+  bool        _print_sum;
+  int         _log_level;
+  uint        _indent_level;
+  bool        _enabled;
+
+  WorkerDataArray<size_t>* _thread_work_items;
+
+  NOT_PRODUCT(inline T uninitialized() const;)
+
+  void set_all(T value);
+
+ public:
+  WorkerDataArray(uint length,
+                  const char* title,
+                  bool print_sum,
+                  int log_level,
+                  uint indent_level);
+
+  ~WorkerDataArray();
+
+  void link_thread_work_items(WorkerDataArray<size_t>* thread_work_items);
+  void set_thread_work_item(uint worker_i, size_t value);
+  WorkerDataArray<size_t>* thread_work_items() const {
+    return _thread_work_items;
+  }
+
+  void set(uint worker_i, T value);
+  T get(uint worker_i) const;
+
+  void add(uint worker_i, T value);
+
+  double average(uint active_threads) const;
+  T sum(uint active_threads) const;
+  T minimum(uint active_threads) const;
+  T maximum(uint active_threads) const;
+  T diff(uint active_threads) const;
+
+  uint indentation() const {
+    return _indent_level;
+  }
+
+  const char* title() const {
+    return _title;
+  }
+
+  bool should_print_sum() const {
+    return _print_sum;
+  }
+
+  int log_level() const {
+    return _log_level;
+  }
+
+  void clear();
+  void set_enabled(bool enabled) {
+    _enabled = enabled;
+  }
+
+  void reset() PRODUCT_RETURN;
+  void verify(uint active_threads) const PRODUCT_RETURN;
+};