/*

 * 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 GenerationCounter is a holder class for performance counters

// that track a generation

class GenerationCounters: public CHeapObj {

  friend class VMStructs;

 protected:

  PerfVariable*      _current_size;

  VirtualSpace*      _virtual_space;

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

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

  // PerfStringConstant*     _name;

  // PerfConstant*           _min_size;

  // PerfConstant*           _max_size;

  // PerfConstant*           _spaces;

  char*              _name_space;

  // This constructor is only meant for use with the PSGenerationCounters

  // constructor.  The need for such an constructor should be eliminated

  // when VirtualSpace and PSVirtualSpace are unified.

  GenerationCounters() : _name_space(NULL), _current_size(NULL), _virtual_space(NULL) {}

 public:

  GenerationCounters(const char* name, int ordinal, int spaces,

                     VirtualSpace* v);

  ~GenerationCounters() {

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

  }

  virtual void update_all() {

    _current_size->set_value(_virtual_space->committed_size());

  }

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

};