Source/WebCore/dom/NodeRareData.cpp

/*
 * Copyright (C) 2012 Google Inc. All rights reserved.
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#include "config.h"
#include "NodeRareData.h"

#include "Page.h"

namespace WebCore {

struct SameSizeAsNodeRareData {
    uint32_t m_tabIndex;
    uint32_t m_childIndexAndIsElementRareDataFlag;
    void* m_pointer[2];
};

static_assert(sizeof(NodeRareData) == sizeof(SameSizeAsNodeRareData), "NodeRareData should stay small");

// Ensure the 10 bits reserved for the m_connectedFrameCount cannot overflow
static_assert(Page::maxNumberOfFrames < 1024, "Frame limit should fit in rare data count");

DEFINE_ALLOCATOR_WITH_HEAP_IDENTIFIER(NodeListsNodeData);
DEFINE_ALLOCATOR_WITH_HEAP_IDENTIFIER(NodeRareData);

} // namespace WebCore