8260263: Remove PtrQueue::_qset

Remove dead code related to PtrQueue::_qset and itself.

Reviewed-by: kbarrett, sjohanss

src/hotspot/share/gc/g1/g1DirtyCardQueue.hpp

@@ -49,8 +49,6 @@ public:
   // doing something else, with auto-flush on completion.
   ~G1DirtyCardQueue();
 
-  inline G1DirtyCardQueueSet* dirty_card_qset() const;
-
   G1ConcurrentRefineStats* refinement_stats() const {
     return _refinement_stats;
   }
@@ -351,8 +349,4 @@ public:
   void discard_max_cards_padding();
 };
 
-inline G1DirtyCardQueueSet* G1DirtyCardQueue::dirty_card_qset() const {
-  return static_cast<G1DirtyCardQueueSet*>(qset());
-}
-
 #endif // SHARE_GC_G1_G1DIRTYCARDQUEUE_HPP

src/hotspot/share/gc/shared/ptrQueue.cpp

@@ -36,7 +36,6 @@
 #include <new>
 
 PtrQueue::PtrQueue(PtrQueueSet* qset) :
-  _qset(qset),
   _index(0),
   _capacity_in_bytes(index_to_byte_index(qset->buffer_size())),
   _buf(NULL)

src/hotspot/share/gc/shared/ptrQueue.hpp

@@ -44,9 +44,6 @@ class PtrQueue {
 
   NONCOPYABLE(PtrQueue);
 
-  // The ptr queue set to which this queue belongs.
-  PtrQueueSet* const _qset;
-
   // The (byte) index at which an object was last enqueued.  Starts at
   // capacity (in bytes) (indicating an empty buffer) and goes towards zero.
   // Value is always pointer-size aligned.
@@ -77,8 +74,6 @@ protected:
   // The buffer.
   void** _buf;
 
-  PtrQueueSet* qset() const { return _qset; }
-
   // Initialize this queue to contain a null buffer, and be part of the
   // given PtrQueueSet.
   PtrQueue(PtrQueueSet* qset);

src/hotspot/share/gc/shared/satbMarkQueue.hpp

@@ -54,16 +54,15 @@ private:
   // active state, to support inline barriers in compiled code.
   bool _active;
 
-  // Filter out unwanted entries from the buffer.
-  inline void filter();
-
 public:
   SATBMarkQueue(SATBMarkQueueSet* qset);
 
   bool is_active() const { return _active; }
   void set_active(bool value) { _active = value; }
 
-  inline SATBMarkQueueSet* satb_qset() const;
+  // Apply cl to the active part of the buffer.
+  // Prerequisite: Must be at a safepoint.
+  void apply_closure_and_empty(SATBBufferClosure* cl);
 
 #ifndef PRODUCT
   // Helpful for debugging
@@ -174,14 +173,6 @@ public:
   void abandon_partial_marking();
 };
 
-inline SATBMarkQueueSet* SATBMarkQueue::satb_qset() const {
-  return static_cast<SATBMarkQueueSet*>(qset());
-}
-
-inline void SATBMarkQueue::filter() {
-  satb_qset()->filter(*this);
-}
-
 // Removes entries from queue's buffer that are no longer needed, as
 // determined by filter. If e is a void* entry in queue's buffer,
 // filter_out(e) must be a valid expression whose value is convertible