src/hotspot/share/gc/g1/g1FullGCOopClosures.hpp

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#ifndef SHARE_GC_G1_G1FULLGCOOPCLOSURES_HPP
#define SHARE_GC_G1_G1FULLGCOOPCLOSURES_HPP

#include "gc/shared/verifyOption.hpp"
#include "memory/iterator.hpp"

class G1CollectedHeap;
class G1FullCollector;
class G1CMBitMap;
class G1FullGCMarker;

// Below are closures used by the G1 Full GC.
class G1IsAliveClosure : public BoolObjectClosure {
  G1FullCollector* _collector;
  G1CMBitMap* _bitmap;

public:
  G1IsAliveClosure(G1FullCollector* collector);
  G1IsAliveClosure(G1FullCollector* collector, G1CMBitMap* bitmap) :
    _collector(collector), _bitmap(bitmap) { }

  virtual bool do_object_b(oop p);
};

class G1FullKeepAliveClosure: public OopClosure {
  G1FullGCMarker* _marker;
  template <class T>
  inline void do_oop_work(T* p);

public:
  G1FullKeepAliveClosure(G1FullGCMarker* pm) : _marker(pm) { }

  virtual void do_oop(oop* p);
  virtual void do_oop(narrowOop* p);
};

class G1MarkAndPushClosure : public ClaimMetadataVisitingOopIterateClosure {
  G1FullGCMarker* _marker;
  uint _worker_id;

public:
  G1MarkAndPushClosure(uint worker_id, G1FullGCMarker* marker, int claim, ReferenceDiscoverer* ref) :
    ClaimMetadataVisitingOopIterateClosure(claim, ref),
    _marker(marker),
    _worker_id(worker_id) { }

  template <class T> inline void do_oop_work(T* p);
  virtual void do_oop(oop* p);
  virtual void do_oop(narrowOop* p);
};

class G1AdjustClosure : public BasicOopIterateClosure {
  G1FullCollector* _collector;

  template <class T> inline void adjust_pointer(T* p);
public:
  G1AdjustClosure(G1FullCollector* collector) : _collector(collector) { }
  template <class T> void do_oop_work(T* p) { adjust_pointer(p); }
  virtual void do_oop(oop* p);
  virtual void do_oop(narrowOop* p);

  virtual ReferenceIterationMode reference_iteration_mode() { return DO_FIELDS; }
};

class G1FollowStackClosure: public VoidClosure {
  G1FullGCMarker* _marker;

public:
  G1FollowStackClosure(G1FullGCMarker* marker) : _marker(marker) {}
  virtual void do_void();
};

#endif // SHARE_GC_G1_G1FULLGCOOPCLOSURES_HPP