jdk-24/src/hotspot/share/gc/z/zHeapIterator.hpp

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#ifndef SHARE_GC_Z_ZHEAPITERATOR_HPP
#define SHARE_GC_Z_ZHEAPITERATOR_HPP

#include "gc/z/zGranuleMap.hpp"
#include "memory/allocation.hpp"
#include "utilities/stack.hpp"

class ObjectClosure;
class ZHeapIteratorBitMap;

class ZHeapIterator : public StackObj {
  template<bool Concurrent, bool Weak> friend class ZHeapIteratorRootOopClosure;
  template<bool VisitReferents> friend class ZHeapIteratorOopClosure;

private:
  typedef ZGranuleMap<ZHeapIteratorBitMap*>         ZVisitMap;
  typedef ZGranuleMapIterator<ZHeapIteratorBitMap*> ZVisitMapIterator;
  typedef Stack<oop, mtGC>                          ZVisitStack;

  ZVisitStack _visit_stack;
  ZVisitMap   _visit_map;

  ZHeapIteratorBitMap* object_map(oop obj);
  void push(oop obj);

  template <typename RootsIterator, bool Concurrent, bool Weak> void push_roots();
  template <bool VisitReferents> void push_fields(oop obj);
  template <bool VisitReferents> void objects_do(ObjectClosure* cl);

public:
  ZHeapIterator();
  ~ZHeapIterator();

  void objects_do(ObjectClosure* cl, bool visit_weaks);
};

#endif // SHARE_GC_Z_ZHEAPITERATOR_HPP