/*

 * Copyright (c) 2015, 2018, Red Hat, Inc. All rights reserved.

 *

 * 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 "precompiled.hpp"

#include "gc/shared/collectorCounters.hpp"

#include "gc/shared/generationCounters.hpp"

#include "gc/shared/hSpaceCounters.hpp"

#include "gc/shenandoah/shenandoahMonitoringSupport.hpp"

#include "gc/shenandoah/shenandoahHeap.hpp"

#include "gc/shenandoah/shenandoahHeapRegionCounters.hpp"

#include "memory/metaspaceCounters.hpp"

#include "services/memoryService.hpp"

class ShenandoahYoungGenerationCounters : public GenerationCounters {

public:

  ShenandoahYoungGenerationCounters() :

          GenerationCounters("Young", 0, 0, 0, (size_t)0, (size_t)0) {};

  virtual void update_all() {

    // no update

  }

};

class ShenandoahGenerationCounters : public GenerationCounters {

private:

  ShenandoahHeap* _heap;

public:

  ShenandoahGenerationCounters(ShenandoahHeap* heap) :

          GenerationCounters("Heap", 1, 1, heap->initial_capacity(), heap->max_capacity(), heap->capacity()),

          _heap(heap)

  {};

  virtual void update_all() {

    _current_size->set_value(_heap->capacity());

  }

};

ShenandoahMonitoringSupport::ShenandoahMonitoringSupport(ShenandoahHeap* heap) :

        _partial_counters(NULL),

        _full_counters(NULL)

{

  // Collection counters do not fit Shenandoah very well.

  // We record partial cycles as "young", and full cycles (including full STW GC) as "old".

  _partial_counters  = new CollectorCounters("Shenandoah partial", 0);

  _full_counters     = new CollectorCounters("Shenandoah full",    1);

  // We report young gen as unused.

  _young_counters = new ShenandoahYoungGenerationCounters();

  _heap_counters  = new ShenandoahGenerationCounters(heap);

  _space_counters = new HSpaceCounters(_heap_counters->name_space(), "Heap", 0, heap->max_capacity(), heap->initial_capacity());

  _heap_region_counters = new ShenandoahHeapRegionCounters();

}

CollectorCounters* ShenandoahMonitoringSupport::stw_collection_counters() {

  return _full_counters;

}

CollectorCounters* ShenandoahMonitoringSupport::full_stw_collection_counters() {

  return _full_counters;

}

CollectorCounters* ShenandoahMonitoringSupport::concurrent_collection_counters() {

  return _full_counters;

}

CollectorCounters* ShenandoahMonitoringSupport::partial_collection_counters() {

  return _partial_counters;

}

void ShenandoahMonitoringSupport::update_counters() {

  MemoryService::track_memory_usage();

  if (UsePerfData) {

    ShenandoahHeap* heap = ShenandoahHeap::heap();

    size_t used = heap->used();

    size_t capacity = heap->max_capacity();

    _heap_counters->update_all();

    _space_counters->update_all(capacity, used);

    _heap_region_counters->update();

    MetaspaceCounters::update_performance_counters();

    CompressedClassSpaceCounters::update_performance_counters();

  }

}