/*

 * Copyright (c) 2015, 2017, 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.

 *

 */

#ifndef SHARE_VM_GC_SHARED_WORKERDATAARRAY_HPP

#define SHARE_VM_GC_SHARED_WORKERDATAARRAY_HPP

#include "memory/allocation.hpp"

#include "utilities/debug.hpp"

class outputStream;

template <class T>

class WorkerDataArray  : public CHeapObj<mtGC> {

  friend class WDAPrinter;

public:

  static const uint MaxThreadWorkItems = 3;

private:

  T*          _data;

  uint        _length;

  const char* _title;

  WorkerDataArray<size_t>* _thread_work_items[MaxThreadWorkItems];

 public:

  WorkerDataArray(uint length, const char* title);

  ~WorkerDataArray();

  void link_thread_work_items(WorkerDataArray<size_t>* thread_work_items, uint index = 0);

  void set_thread_work_item(uint worker_i, size_t value, uint index = 0);

  void add_thread_work_item(uint worker_i, size_t value, uint index = 0);

  WorkerDataArray<size_t>* thread_work_items(uint index = 0) const {

    assert(index < MaxThreadWorkItems, "Tried to access thread work item %u max %u", index, MaxThreadWorkItems);

    return _thread_work_items[index];

  }

  static T uninitialized();

  void set(uint worker_i, T value);

  T get(uint worker_i) const;

  void add(uint worker_i, T value);

  // The sum() and average() methods below consider uninitialized slots to be 0.

  double average() const;

  T sum() const;

  const char* title() const {

    return _title;

  }

  void reset();

  void set_all(T value);

 private:

  class WDAPrinter {

  public:

    static void summary(outputStream* out, double min, double avg, double max, double diff, double sum, bool print_sum);

    static void summary(outputStream* out, size_t min, double avg, size_t max, size_t diff, size_t sum, bool print_sum);

    static void details(const WorkerDataArray<double>* phase, outputStream* out);

    static void details(const WorkerDataArray<size_t>* phase, outputStream* out);

  };

 public:

  void print_summary_on(outputStream* out, bool print_sum = true) const;

  void print_details_on(outputStream* out) const;

};

#endif // SHARE_VM_GC_SHARED_WORKERDATAARRAY_HPP