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44 lines
1.2 KiB
C++
44 lines
1.2 KiB
C++
#ifndef ASYNCHRONOUS_CONTINUATION_CHAIN_LINK_H
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#define ASYNCHRONOUS_CONTINUATION_CHAIN_LINK_H
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#include <functional>
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#include <memory>
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#include <optional>
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namespace sscl::cps {
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class LockSet;
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/**
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* @brief Base class for all asynchronous continuation chain links
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*
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* This non-template base class provides type erasure for the continuation
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* chain, allowing RTTI and dynamic casting when walking the chain.
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*
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* The chain walking logic can use dynamic_cast to determine the most
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* derived type and perform appropriate operations.
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*
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* Inherits from enable_shared_from_this to allow objects to obtain a
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* shared_ptr to themselves, which is useful for gridlock detection tracking.
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*/
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class AsynchronousContinuationChainLink
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: public std::enable_shared_from_this<AsynchronousContinuationChainLink>
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{
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public:
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virtual ~AsynchronousContinuationChainLink() = default;
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virtual std::shared_ptr<AsynchronousContinuationChainLink>
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getCallersContinuationShPtr() const = 0;
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virtual std::optional<std::reference_wrapper<const LockSet>>
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getLockSet() const
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{ return std::nullopt; }
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virtual std::optional<std::reference_wrapper<LockSet>> getLockSet()
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{ return std::nullopt; }
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};
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} // namespace sscl::cps
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#endif // ASYNCHRONOUS_CONTINUATION_CHAIN_LINK_H
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