7ed4f0ca27
* perf: make ElectronUsbDelegate::controller_map_ an absl::flat_hash_map * perf: make ElectronSerialDelegate::controller_map_ an absl::flat_hash_map * perf: make ElectronHidDelegate::controller_map_ an absl::flat_hash_map * perf: make FrameTreeNodeIdMap an absl::flat_hash_map * perf: make AutofillDriverFactory::driver_map_ an absl::flat_hash_map * perf: make asar::Archive::external_files_ an absl::flat_hash_map * perf: make VersionIdMap an absl::flat_hash_map * perf: make ObjectCache::proxy_map_ an absl::flat_hash_map * docs: add TODO to investigate absl map in KeyWeakMap
43 lines
1.3 KiB
C++
43 lines
1.3 KiB
C++
// Copyright (c) 2020 Slack Technologies, Inc.
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// Use of this source code is governed by the MIT license that can be
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// found in the LICENSE file.
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#ifndef ELECTRON_SHELL_RENDERER_API_CONTEXT_BRIDGE_OBJECT_CACHE_H_
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#define ELECTRON_SHELL_RENDERER_API_CONTEXT_BRIDGE_OBJECT_CACHE_H_
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#include "third_party/abseil-cpp/absl/container/flat_hash_map.h"
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#include "v8/include/v8-local-handle.h"
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#include "v8/include/v8-object.h"
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namespace electron::api::context_bridge {
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/**
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* NB: This is designed for context_bridge. Beware using it elsewhere!
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* Since it's a v8::Local-to-v8::Local cache, be careful to destroy it
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* before destroying the HandleScope that keeps the locals alive.
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*/
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class ObjectCache final {
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public:
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ObjectCache();
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~ObjectCache();
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void CacheProxiedObject(v8::Local<v8::Value> from,
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v8::Local<v8::Value> proxy_value);
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v8::MaybeLocal<v8::Value> GetCachedProxiedObject(
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v8::Local<v8::Value> from) const;
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private:
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struct Hash {
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std::size_t operator()(const v8::Local<v8::Object>& obj) const {
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return obj->GetIdentityHash();
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}
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};
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// from_object ==> proxy_value
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absl::flat_hash_map<v8::Local<v8::Object>, v8::Local<v8::Value>, Hash>
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proxy_map_;
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};
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} // namespace electron::api::context_bridge
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#endif // ELECTRON_SHELL_RENDERER_API_CONTEXT_BRIDGE_OBJECT_CACHE_H_
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