56 //

    56 //

    57 //   ParNewGeneration + ConcurrentMarkSweepGeneration

    57 //   ParNewGeneration + ConcurrentMarkSweepGeneration

    58 //

    58 //

    59 

    59 

    60 class DefNewGeneration;

    60 class DefNewGeneration;

    61 class GenerationSpec;

    62 class GenerationSpec;

    62 class CompactibleSpace;

    63 class CompactibleSpace;

    63 class ContiguousSpace;

    64 class ContiguousSpace;

    64 class CompactPoint;

    65 class CompactPoint;

    65 class OopsInGenClosure;

    66 class OopsInGenClosure;

    83   friend class VMStructs;

    84   friend class VMStructs;

    84  private:

    85  private:

    85   jlong _time_of_last_gc; // time when last gc on this generation happened (ms)

    86   jlong _time_of_last_gc; // time when last gc on this generation happened (ms)

    86   MemRegion _prev_used_region; // for collectors that want to "remember" a value for

    87   MemRegion _prev_used_region; // for collectors that want to "remember" a value for

    87                                // used region at some specific point during collection.

    88                                // used region at some specific point during collection.

    88 

    91 

    89  protected:

    92  protected:

    90   // Minimum and maximum addresses for memory reserved (not necessarily

    93   // Minimum and maximum addresses for memory reserved (not necessarily

    91   // committed) for generation.

    94   // committed) for generation.

    92   // Used by card marking code. Must not overlap with address ranges of

    95   // Used by card marking code. Must not overlap with address ranges of

   552   virtual void print_summary_info_on(outputStream* st);

   555   virtual void print_summary_info_on(outputStream* st);

   553 

   556 

   554   // Performance Counter support

   557   // Performance Counter support

   555   virtual void update_counters() = 0;

   558   virtual void update_counters() = 0;

   556   virtual CollectorCounters* counters() { return _gc_counters; }

   559   virtual CollectorCounters* counters() { return _gc_counters; }

   557 };

   570 };

   558 

   571 

   559 #endif // SHARE_VM_GC_SHARED_GENERATION_HPP

   572 #endif // SHARE_VM_GC_SHARED_GENERATION_HPP