third_party/WebKit/Source/bindings/core/v8/RetainedDOMInfo.h

/*
 * Copyright (C) 2011 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
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 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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#ifndef RetainedDOMInfo_h
#define RetainedDOMInfo_h

#include "bindings/core/v8/RetainedObjectInfo.h"
#include "platform/heap/Handle.h"
#include <v8-profiler.h>

namespace blink {

class Node;

// Implements v8::RetainedObjectInfo.
class RetainedDOMInfo final : public RetainedObjectInfo {
 public:
  explicit RetainedDOMInfo(Node* root);
  ~RetainedDOMInfo() override;
  void Dispose() override;
  bool IsEquivalent(v8::RetainedObjectInfo* other) override;
  intptr_t GetHash() override;
  const char* GetGroupLabel() override;
  const char* GetLabel() override;
  intptr_t GetElementCount() override;
  intptr_t GetEquivalenceClass() override;

  static v8::RetainedObjectInfo* createRetainedDOMInfo(
      uint16_t classId,
      v8::Local<v8::Value> wrapper);

 private:
  // V8 guarantees to keep RetainedObjectInfos alive only during a GC or heap
  // snapshotting round, when renderer doesn't get control. This allows us to
  // use raw pointers.
  UntracedMember<Node> m_root;
};

class ActiveDOMObjectsInfo final : public RetainedObjectInfo {
 public:
  explicit ActiveDOMObjectsInfo(int numberOfObjectsWithPendingActivity);
  ~ActiveDOMObjectsInfo() override;
  void Dispose() override;
  bool IsEquivalent(v8::RetainedObjectInfo* other) override;
  intptr_t GetHash() override;
  const char* GetGroupLabel() override;
  const char* GetLabel() override;
  intptr_t GetElementCount() override;
  intptr_t GetEquivalenceClass() override;

 private:
  int m_numberOfObjectsWithPendingActivity;
};

}  // namespace blink

#endif  // RetainedDOMInfo_h