unmarker.h

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// Copyright 2021 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
#ifndef V8_HEAP_CPPGC_UNMARKER_H_
#define V8_HEAP_CPPGC_UNMARKER_H_
 
#include "src/heap/cppgc/heap-object-header.h"
#include "src/heap/cppgc/heap-visitor.h"
 
namespace cppgc {
namespace internal {
 
class SequentialUnmarker final : private HeapVisitor<SequentialUnmarker> {
  friend class HeapVisitor<SequentialUnmarker>;
 
 public:
  explicit SequentialUnmarker(RawHeap& heap) { Traverse(heap); }
 
  bool VisitNormalPage(NormalPage& page) {
    page.ResetMarkedBytes();
    return false;
  }
 
  bool VisitLargePage(LargePage& page) {
    page.ResetMarkedBytes();
    return false;
  }
 
 private:
  bool VisitHeapObjectHeader(HeapObjectHeader& header) {
    if (header.IsMarked()) {
      header.Unmark();
    }
    return true;
  }
};
 
}  // namespace internal
}  // namespace cppgc
 
#endif  // V8_HEAP_CPPGC_UNMARKER_H_