generationCounters.hpp

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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
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// 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; }
};