eldritch horrors
6897e238bd
Factor out bits of the worker protocol to use elsewhere
(cherry picked from commit 4b1a97338f517f45e6169d3d8845c5caa5724e97)
Change-Id: If93afa0f8b1cf9b0e705b34fa71e6fd708752758
60 lines
1.7 KiB
C++
60 lines
1.7 KiB
C++
#pragma once
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/**
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* @file
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*
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* Template implementations (as opposed to mere declarations).
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*
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* This file is an exmample of the "impl.hh" pattern. See the
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* contributing guide.
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*/
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#include "worker-protocol.hh"
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#include "length-prefixed-protocol-helper.hh"
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namespace nix {
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/* protocol-agnostic templates */
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#define WORKER_USE_LENGTH_PREFIX_SERIALISER(TEMPLATE, T) \
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TEMPLATE T WorkerProto::Serialise< T >::read(const Store & store, WorkerProto::ReadConn conn) \
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{ \
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return LengthPrefixedProtoHelper<WorkerProto, T >::read(store, conn); \
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} \
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TEMPLATE void WorkerProto::Serialise< T >::write(const Store & store, WorkerProto::WriteConn conn, const T & t) \
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{ \
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LengthPrefixedProtoHelper<WorkerProto, T >::write(store, conn, t); \
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}
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WORKER_USE_LENGTH_PREFIX_SERIALISER(template<typename T>, std::vector<T>)
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WORKER_USE_LENGTH_PREFIX_SERIALISER(template<typename T>, std::set<T>)
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WORKER_USE_LENGTH_PREFIX_SERIALISER(template<typename... Ts>, std::tuple<Ts...>)
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#define COMMA_ ,
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WORKER_USE_LENGTH_PREFIX_SERIALISER(
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template<typename K COMMA_ typename V>,
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std::map<K COMMA_ V>)
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#undef COMMA_
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/**
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* Use `CommonProto` where possible.
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*/
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template<typename T>
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struct WorkerProto::Serialise
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{
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static T read(const Store & store, WorkerProto::ReadConn conn)
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{
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return CommonProto::Serialise<T>::read(store,
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CommonProto::ReadConn { .from = conn.from });
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}
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static void write(const Store & store, WorkerProto::WriteConn conn, const T & t)
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{
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CommonProto::Serialise<T>::write(store,
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CommonProto::WriteConn { .to = conn.to },
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t);
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}
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};
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/* protocol-specific templates */
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}
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