mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
Andres Suarez
8bd3edec88
Reviewed By: aaronabramov Differential Revision: D33367752 fbshipit-source-id: 4ce94d184485e5ee0a62cf67ad2d3ba16e285c8f
58 lines
1.5 KiB
C++
58 lines
1.5 KiB
C++
/*
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#pragma once
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#include <memory>
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#include <mutex>
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#include <unordered_set>
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namespace facebook {
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namespace react {
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/**
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* A simple wrapper class that can be registered to a collection that keep it
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* alive for extended period of time. This object can be removed from the
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* collection when needed.
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*
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* The subclass of this class must be created using std::make_shared<T>().
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* After creation, add it to the `LongLivedObjectCollection`.
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* When done with the object, call `allowRelease()` to allow the OS to release
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* it.
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*/
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class LongLivedObject {
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public:
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virtual void allowRelease();
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protected:
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LongLivedObject();
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virtual ~LongLivedObject();
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};
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/**
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* A singleton, thread-safe, write-only collection for the `LongLivedObject`s.
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*/
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class LongLivedObjectCollection {
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public:
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static LongLivedObjectCollection &get();
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LongLivedObjectCollection();
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LongLivedObjectCollection(LongLivedObjectCollection const &) = delete;
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void operator=(LongLivedObjectCollection const &) = delete;
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void add(std::shared_ptr<LongLivedObject> o) const;
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void remove(const LongLivedObject *o) const;
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void clear() const;
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private:
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mutable std::unordered_set<std::shared_ptr<LongLivedObject>> collection_;
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mutable std::mutex collectionMutex_;
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};
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} // namespace react
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} // namespace facebook
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