src/hotspot/share/gc/g1/g1CollectionSet.hpp

*** 276,285 ****
--- 276,295 ----
    // Start a new collection set increment.
    void update_incremental_marker() { _inc_build_state = Active; _inc_part_start = _collection_set_cur_length; }
    // Stop adding regions to the current collection set increment.
    void stop_incremental_building() { _inc_build_state = Inactive; }
  
+   // Iterate the part of the collection set given by the offset and length applying the given
+   // HeapRegionClosure. The worker_id will determine where in the part to start the iteration
+   // to allow for more efficient parallel iteration.
+   void iterate_part_from(HeapRegionClosure* cl,
+                          HeapRegionClaimer* hr_claimer,
+                          size_t offset,
+                          size_t lenght,
+                          uint worker_id,
+                          uint total_workers) const;
+ 
    // Iterate over the current collection set increment applying the given HeapRegionClosure
    // from a starting position determined by the given worker id.
    void iterate_incremental_part_from(HeapRegionClosure* cl, HeapRegionClaimer* hr_claimer, uint worker_id, uint total_workers) const;
  
    // Returns the length of the current increment in number of regions.
*** 288,297 ****
--- 298,311 ----
    size_t cur_length() const { return _collection_set_cur_length; }
  
    // Iterate over the entire collection set (all increments calculated so far), applying
    // the given HeapRegionClosure on all of them.
    void iterate(HeapRegionClosure* cl) const;
+   void par_iterate(HeapRegionClosure* cl,
+                    HeapRegionClaimer* hr_claimer,
+                    uint worker_id,
+                    uint total_workers) const;
  
    void iterate_optional(HeapRegionClosure* cl) const;
  
    size_t recorded_rs_length() { return _recorded_rs_length; }