src/share/vm/services/memTrackWorker.hpp

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rev 3901 : JDK-8005012: Add WB APIs to better support NMT testing
Summary:
*** 64,73 ****
--- 64,74 ----
  
    NOT_PRODUCT(int _sync_point_count;)
    NOT_PRODUCT(int _merge_count;)
    NOT_PRODUCT(int _last_gen_in_use;)
  
+   // how many generations are queued
    inline int generations_in_use() const {
      return (_tail >= _head ? (_tail - _head + 1) : (MAX_GENERATIONS - (_head - _tail) + 1));
    }
  };