46 lines
1.0 KiB
C++
46 lines
1.0 KiB
C++
// Copyright (c) 2004-present, Facebook, Inc.
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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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#pragma once
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#include <memory>
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#include <mutex>
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#include <typeindex>
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#include <typeinfo>
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#include <unordered_map>
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namespace facebook {
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namespace react {
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class ContextContainer;
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using SharedContextContainer = std::shared_ptr<ContextContainer>;
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/*
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* General purpose dependecy injection container.
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*/
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class ContextContainer final {
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public:
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template<typename T>
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void registerInstance(std::shared_ptr<T> instance) {
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std::lock_guard<std::mutex> lock(mutex_);
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instances_.insert({std::type_index(typeid(T)), instance});
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}
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template<typename T>
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std::shared_ptr<T> getInstance() const {
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std::lock_guard<std::mutex> lock(mutex_);
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return std::static_pointer_cast<T>(instances_.at(std::type_index(typeid(T))));
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}
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private:
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std::unordered_map<std::type_index, std::shared_ptr<void>> instances_;
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mutable std::mutex mutex_;
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};
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} // namespace react
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} // namespace facebook
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