34   friend class ShenandoahHeap;
  35 private:
  36   size_t const          _map_size;
  37   size_t const          _region_size_bytes_shift;
  38   ReservedSpace         _map_space;
  39   char* const           _cset_map;
  40   // Bias cset map's base address for fast test if an oop is in cset
  41   char* const           _biased_cset_map;
  42 
  43   ShenandoahHeap* const _heap;
  44 
  45   size_t                _garbage;
  46   size_t                _used;
  47   size_t                _region_count;
  48 
  49   shenandoah_padding(0);
  50   volatile jint         _current_index;
  51   shenandoah_padding(1);
  52 
  53 public:
  54   ShenandoahCollectionSet(ShenandoahHeap* heap, char* heap_base, size_t size);
  55 
  56   // Add region to collection set
  57   void add_region(ShenandoahHeapRegion* r);
  58 
  59   // MT version
  60   ShenandoahHeapRegion* claim_next();
  61 
  62   // Single-thread version
  63   ShenandoahHeapRegion* next();
  64 
  65   size_t count()  const { return _region_count; }
  66   bool is_empty() const { return _region_count == 0; }
  67 
  68   void clear_current_index() {
  69     _current_index = 0;
  70   }
  71 
  72   inline bool is_in(ShenandoahHeapRegion* r) const;
  73   inline bool is_in(size_t region_idx)       const;
  74   inline bool is_in(oop obj)                 const;

  34   friend class ShenandoahHeap;
  35 private:
  36   size_t const          _map_size;
  37   size_t const          _region_size_bytes_shift;
  38   ReservedSpace         _map_space;
  39   char* const           _cset_map;
  40   // Bias cset map's base address for fast test if an oop is in cset
  41   char* const           _biased_cset_map;
  42 
  43   ShenandoahHeap* const _heap;
  44 
  45   size_t                _garbage;
  46   size_t                _used;
  47   size_t                _region_count;
  48 
  49   shenandoah_padding(0);
  50   volatile jint         _current_index;
  51   shenandoah_padding(1);
  52 
  53 public:
  54   ShenandoahCollectionSet(ShenandoahHeap* heap, ReservedSpace space, char* heap_base);
  55 
  56   // Add region to collection set
  57   void add_region(ShenandoahHeapRegion* r);
  58 
  59   // MT version
  60   ShenandoahHeapRegion* claim_next();
  61 
  62   // Single-thread version
  63   ShenandoahHeapRegion* next();
  64 
  65   size_t count()  const { return _region_count; }
  66   bool is_empty() const { return _region_count == 0; }
  67 
  68   void clear_current_index() {
  69     _current_index = 0;
  70   }
  71 
  72   inline bool is_in(ShenandoahHeapRegion* r) const;
  73   inline bool is_in(size_t region_idx)       const;
  74   inline bool is_in(oop obj)                 const;