src/hotspot/share/gc/g1/g1RootClosures.hpp

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#ifndef SHARE_VM_GC_G1_G1ROOTCLOSURESET_HPP
#define SHARE_VM_GC_G1_G1ROOTCLOSURESET_HPP

#include "memory/allocation.hpp"
#include "memory/iterator.hpp"

class G1CollectedHeap;
class G1ParScanThreadState;

class G1RootClosures : public CHeapObj<mtGC> {
public:
  virtual ~G1RootClosures() {}

// Closures to process raw oops in the root set.
  virtual OopClosure* weak_oops() = 0;
  virtual OopClosure* strong_oops() = 0;

  // Closures to process CLDs in the root set.
  virtual CLDClosure* weak_clds() = 0;
  virtual CLDClosure* strong_clds() = 0;

  // Applied to code blobs reachable as strong roots.
  virtual CodeBlobClosure* strong_codeblobs() = 0;
};

class G1EvacuationRootClosures : public G1RootClosures {
public:
  // Applied to the weakly reachable CLDs when all strongly reachable
  // CLDs are guaranteed to have been processed.
  virtual CLDClosure* second_pass_weak_clds() = 0;

  // Get a raw oop closure for processing oops, bypassing the flushing above.
  virtual OopClosure* raw_strong_oops() = 0;

  // Applied to code blobs treated as weak roots.
  virtual CodeBlobClosure* weak_codeblobs() = 0;

  // Is this closure used for tracing metadata?
  virtual bool trace_metadata() = 0;

  static G1EvacuationRootClosures* create_root_closures(G1ParScanThreadState* pss, G1CollectedHeap* g1h);
};

#endif // SHARE_VM_GC_G1_G1ROOTCLOSURESET_HPP