/*

 * 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 "gc/g1/workerDataArray.hpp"

#include "memory/allocation.inline.hpp"

template <typename T>

WorkerDataArray<T>::WorkerDataArray(uint length,

                                    const char* title,

                                    bool print_sum,

                                    int log_level,

                                    uint indent_level) :

 _title(title),

 _length(0),

 _print_sum(print_sum),

 _log_level(log_level),

 _indent_level(indent_level),

 _thread_work_items(NULL),

 _enabled(true) {

  assert(length > 0, "Must have some workers to store data for");

  _length = length;

  _data = NEW_C_HEAP_ARRAY(T, _length, mtGC);

  reset();

}

template <typename T>

void WorkerDataArray<T>::set(uint worker_i, T value) {

  assert(worker_i < _length, "Worker %d is greater than max: %d", worker_i, _length);

  assert(_data[worker_i] == uninitialized(), "Overwriting data for worker %d in %s", worker_i, _title);

  _data[worker_i] = value;

}

template <typename T>

T WorkerDataArray<T>::get(uint worker_i) const {

  assert(worker_i < _length, "Worker %d is greater than max: %d", worker_i, _length);

  assert(_data[worker_i] != uninitialized(), "No data added for worker %d", worker_i);

  return _data[worker_i];

}

template <typename T>

WorkerDataArray<T>::~WorkerDataArray() {

  FREE_C_HEAP_ARRAY(T, _data);

}

template <typename T>

void WorkerDataArray<T>::link_thread_work_items(WorkerDataArray<size_t>* thread_work_items) {

  _thread_work_items = thread_work_items;

}

template <typename T>

void WorkerDataArray<T>::set_thread_work_item(uint worker_i, size_t value) {

  assert(_thread_work_items != NULL, "No sub count");

  _thread_work_items->set(worker_i, value);

}

template <typename T>

void WorkerDataArray<T>::add(uint worker_i, T value) {

  assert(worker_i < _length, "Worker %d is greater than max: %d", worker_i, _length);

  assert(_data[worker_i] != uninitialized(), "No data to add to for worker %d", worker_i);

  _data[worker_i] += value;

}

template <typename T>

double WorkerDataArray<T>::average(uint active_threads) const {

  return sum(active_threads) / (double) active_threads;

}

template <typename T>

T WorkerDataArray<T>::sum(uint active_threads) const {

  T s = get(0);

  for (uint i = 1; i < active_threads; ++i) {

    s += get(i);

  }

  return s;

}

template <typename T>

T WorkerDataArray<T>::minimum(uint active_threads) const {

  T min = get(0);

  for (uint i = 1; i < active_threads; ++i) {

    min = MIN2(min, get(i));

  }

  return min;

}

template <typename T>

T WorkerDataArray<T>::maximum(uint active_threads) const {

  T max = get(0);

  for (uint i = 1; i < active_threads; ++i) {

    max = MAX2(max, get(i));

  }

  return max;

}

template <typename T>

T WorkerDataArray<T>::diff(uint active_threads) const {

  return maximum(active_threads) - minimum(active_threads);

}

template <typename T>

void WorkerDataArray<T>::clear() {

  set_all(0);

}

template <typename T>

void WorkerDataArray<T>::set_all(T value) {

  for (uint i = 0; i < _length; i++) {

    _data[i] = value;

  }

}

#ifndef PRODUCT

template <typename T>

void WorkerDataArray<T>::reset() {

  set_all(uninitialized());

  if (_thread_work_items != NULL) {

    _thread_work_items->reset();

  }

}

template <typename T>

void WorkerDataArray<T>::verify(uint active_threads) const {

  if (!_enabled) {

    return;

  }

  assert(active_threads <= _length, "Wrong number of active threads");

  for (uint i = 0; i < active_threads; i++) {

    assert(_data[i] != uninitialized(),

           "Invalid data for worker %u in '%s'", i, _title);

  }

  if (_thread_work_items != NULL) {

    _thread_work_items->verify(active_threads);

  }

}

template <>

inline size_t WorkerDataArray<size_t>::uninitialized() const {

  return (size_t)-1;

}

template <>

inline double WorkerDataArray<double>::uninitialized() const {

  return -1.0;

}

#endif