chromium/src/third_party/blink/renderer/platform/heap/v8_wrapper/member.h

// Copyright 2020 The Chromium 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 THIRD_PARTY_BLINK_RENDERER_PLATFORM_HEAP_V8_WRAPPER_MEMBER_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_HEAP_V8_WRAPPER_MEMBER_H_

#include "third_party/blink/renderer/platform/heap/thread_state.h"
#include "v8/include/cppgc/member.h"

namespace blink {

template <typename T>
using Member = cppgc::Member<T>;

template <typename T>
using WeakMember = cppgc::WeakMember<T>;

template <typename T>
using UntracedMember = cppgc::UntracedMember<T>;

template <typename T>
inline bool IsHashTableDeletedValue(const Member<T>& m) {
  return m == cppgc::kSentinelPointer;
}

constexpr auto kMemberDeletedValue = cppgc::kSentinelPointer;

template <typename T>
struct ThreadingTrait<blink::Member<T>> {
  STATIC_ONLY(ThreadingTrait);
  static constexpr ThreadAffinity kAffinity = ThreadingTrait<T>::kAffinity;
};

template <typename T>
struct ThreadingTrait<blink::WeakMember<T>> {
  STATIC_ONLY(ThreadingTrait);
  static constexpr ThreadAffinity kAffinity = ThreadingTrait<T>::kAffinity;
};

template <typename T>
struct ThreadingTrait<blink::UntracedMember<T>> {
  STATIC_ONLY(ThreadingTrait);
  static constexpr ThreadAffinity kAffinity = ThreadingTrait<T>::kAffinity;
};

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_PLATFORM_HEAP_V8_WRAPPER_MEMBER_H_