/*

 * 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

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 */

// A SpaceCounter is a holder class for performance counters

// that track a space;

class SpaceCounters: public CHeapObj {

  friend class VMStructs;

 private:

  PerfVariable*      _capacity;

  PerfVariable*      _used;

  // Constant PerfData types don't need to retain a reference.

  // However, it's a good idea to document them here.

  // PerfConstant*     _size;

  MutableSpace*     _object_space;

  char*             _name_space;

 public:

  SpaceCounters(const char* name, int ordinal, size_t max_size,

                MutableSpace* m, GenerationCounters* gc);

  ~SpaceCounters() {

    if (_name_space != NULL) FREE_C_HEAP_ARRAY(char, _name_space);

  }

  inline void update_capacity() {

    _capacity->set_value(_object_space->capacity_in_bytes());

  }

  inline void update_used() {

    _used->set_value(_object_space->used_in_bytes());

  }

  inline void update_all() {

    update_used();

    update_capacity();

  }

  const char* name_space() const        { return _name_space; }

};

class MutableSpaceUsedHelper: public PerfLongSampleHelper {

  private:

    MutableSpace* _m;

  public:

    MutableSpaceUsedHelper(MutableSpace* m) : _m(m) { }

    inline jlong take_sample() {

      return _m->used_in_bytes();

    }

};