cSpaceCounters.hpp

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#ifndef SHARE_GC_SERIAL_CSPACECOUNTERS_HPP
#define SHARE_GC_SERIAL_CSPACECOUNTERS_HPP

#include "gc/shared/generationCounters.hpp"
#include "gc/shared/space.hpp"
#include "runtime/perfData.hpp"

// A CSpaceCounters is a holder class for performance counters
// that track a space;

class CSpaceCounters: public CHeapObj<mtGC> {
  friend class VMStructs;

 private:
  PerfVariable*      _capacity;
  PerfVariable*      _used;
  PerfVariable*      _max_capacity;

  // 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();

  virtual void update_capacity();
  virtual void update_used();
  virtual void update_all();

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

class ContiguousSpaceUsedHelper : public PerfLongSampleHelper {
  private:
    ContiguousSpace* _space;

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

    jlong take_sample();
};

#endif // SHARE_GC_SERIAL_CSPACECOUNTERS_HPP