src/share/vm/gc_implementation/g1/heapRegionRemSet.hpp

rev 7558 : 8048179: Early reclaim of large objects that are referenced by a few objects
Summary:
Reviewed-by:
rev 7559 : imported patch bengt-review
rev 7560 : [mq]: bengt-review2

@@ -181,10 +181,14 @@
   void add_reference(OopOrNarrowOopStar from, uint tid);
 
   // Returns whether the remembered set contains the given reference.
   bool contains_reference(OopOrNarrowOopStar from) const;
 
+  // Returns whether this remembered set (and all sub-sets) have an occupancy
+  // that is less or equal than the given occupancy.
+  bool occupancy_less_or_equal_than(size_t limit) const;  
+
   // Removes any entries shown by the given bitmaps to contain only dead
   // objects. Not thread safe.
   // Set bits in the bitmaps indicate that the given region or card is live.
   void scrub(CardTableModRefBS* ctbs, BitMap* region_bm, BitMap* card_bm);
 

@@ -259,10 +263,14 @@
 
   bool is_empty() const {
     return (strong_code_roots_list_length() == 0) && _other_regions.is_empty();
   }
 
+  bool occupancy_less_or_equal_than(size_t occ) const {
+    return (strong_code_roots_list_length() == 0) && _other_regions.occupancy_less_or_equal_than(occ);
+  }
+
   size_t occupied() {
     MutexLockerEx x(&_m, Mutex::_no_safepoint_check_flag);
     return occupied_locked();
   }
   size_t occupied_locked() {