/*

 * Copyright 2002-2004 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 *

 */

// A CSpaceCounters is a holder class for performance counters

// that track a space;

class CSpaceCounters: 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;

  ContiguousSpace*     _space;

  char*                _name_space;

 public:

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

                 ContiguousSpace* s, GenerationCounters* gc);

  ~CSpaceCounters() {

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

  }

  inline void update_capacity() {

    _capacity->set_value(_space->capacity());

  }

  inline void update_used() {

    _used->set_value(_space->used());

  }

  inline void update_all() {

    update_used();

    update_capacity();

  }

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

};

class ContiguousSpaceUsedHelper : public PerfLongSampleHelper {

  private:

    ContiguousSpace* _space;

  public:

    ContiguousSpaceUsedHelper(ContiguousSpace* space) : _space(space) { }

    inline jlong take_sample() {

      return _space->used();

    }

};