runningCounters.hpp

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#ifndef SHARE_MEMORY_METASPACE_RUNNINGCOUNTERS_HPP
#define SHARE_MEMORY_METASPACE_RUNNINGCOUNTERS_HPP

#include "memory/allocation.hpp"
#include "memory/metaspace/counters.hpp"

namespace metaspace {

// This class is a convenience interface for accessing global metaspace counters.
class RunningCounters : public AllStatic {

  static SizeAtomicCounter _used_class_counter;
  static SizeAtomicCounter _used_nonclass_counter;

public:

  // ---- virtual memory -----

  // Return reserved size, in words, for Metaspace
  static size_t reserved_words();
  static size_t reserved_words_class();
  static size_t reserved_words_nonclass();

  // Return total committed size, in words, for Metaspace
  static size_t committed_words();
  static size_t committed_words_class();
  static size_t committed_words_nonclass();

  // ---- used chunks -----

  // Returns size, in words, used for metadata.
  static size_t used_words();
  static size_t used_words_class();
  static size_t used_words_nonclass();

  // ---- free chunks -----

  // Returns size, in words, of all chunks in all freelists.
  static size_t free_chunks_words();
  static size_t free_chunks_words_class();
  static size_t free_chunks_words_nonclass();

  // Direct access to the counters.
  static SizeAtomicCounter* used_nonclass_counter()     { return &_used_nonclass_counter; }
  static SizeAtomicCounter* used_class_counter()        { return &_used_class_counter; }

};

} // namespace metaspace

#endif // SHARE_MEMORY_METASPACE_RUNNINGCOUNTERS_HPP