chromium/third_party/blink/renderer/platform/bindings/v8_global_value_map.h

// Copyright 2015 The Chromium Authors
// 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_BINDINGS_V8_GLOBAL_VALUE_MAP_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_BINDINGS_V8_GLOBAL_VALUE_MAP_H_

#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"
#include "third_party/blink/renderer/platform/wtf/hash_map.h"
#include "third_party/blink/renderer/platform/wtf/text/string_hash.h"
#include "v8/include/v8-util.h"
#include "v8/include/v8.h"

namespace blink {

/**
 * A Traits class for v8::GlobalValueMap that uses wtf/HashMap as a
 * backing store.
 *
 * The parameter is_weak will determine whether the references are 'weak'.
 * If so, entries will be removed from the map as the weak references are
 * collected.
 */
template <typename KeyType,
          typename ValueType,
          v8::PersistentContainerCallbackType type>
class V8GlobalValueMapTraits { … };

/**
 * A map for safely storing persistent V8 values, based on
 * v8::GlobalValueMap.
 */
template <typename KeyType, typename ValueType>
class V8GlobalValueMap
    : public v8::GlobalValueMap<
          KeyType,
          ValueType,
          V8GlobalValueMapTraits<KeyType, ValueType, v8::kNotWeak>> { … };

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_PLATFORM_BINDINGS_V8_GLOBAL_VALUE_MAP_H_