/*

 * Copyright (c) 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.

 *

 */

#ifndef SHARE_GC_SHENANDOAH_SHENANDOAHMETRICS_HPP

#define SHARE_GC_SHENANDOAH_SHENANDOAHMETRICS_HPP

#include "gc/shenandoah/shenandoahHeap.hpp"

class ShenandoahMetrics {

private:

  ShenandoahMetrics() {}

public:

  static double internal_fragmentation();

  static double external_fragmentation();

};

class ShenandoahMetricsSnapshot : public StackObj {

private:

  ShenandoahHeap* _heap;

  size_t _used_before, _used_after;

  double _if_before, _if_after;

  double _ef_before, _ef_after;

public:

  ShenandoahMetricsSnapshot();

  void snap_before();

  void snap_after();

  bool is_good_progress();

};

#endif // SHARE_GC_SHENANDOAH_SHENANDOAHMETRICS_HPP