// 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_