75950664a7
Summary: This diff splits single node and distributed storage from each other. Currently all of the storage code is copied into two directories (one single node, one distributed). The logic used in the storage implementation isn't touched, it will be refactored in following diffs. To clean the working directory after this diff you should execute: ``` rm database/state_delta.capnp rm database/state_delta.hpp rm storage/concurrent_id_mapper_rpc_messages.capnp rm storage/concurrent_id_mapper_rpc_messages.hpp ``` Reviewers: teon.banek, buda, msantl Reviewed By: teon.banek, msantl Subscribers: teon.banek, pullbot Differential Revision: https://phabricator.memgraph.io/D1625
41 lines
1.1 KiB
C++
41 lines
1.1 KiB
C++
#pragma once
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#include "mvcc/single_node/record.hpp"
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#include "transactions/single_node/engine_single_node.hpp"
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/**
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* @brief - Empty class which inherits from mvcc:Record.
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*/
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class Prop : public mvcc::Record<Prop> {
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public:
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Prop *CloneData() { return new Prop; }
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};
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/**
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* @brief - Class which inherits from mvcc::Record and takes an atomic variable
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* to count number of destructor calls (to test if the record is actually
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* deleted).
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*/
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class DestrCountRec : public mvcc::Record<DestrCountRec> {
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public:
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explicit DestrCountRec(std::atomic<int> &count) : count_(count) {}
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DestrCountRec *CloneData() { return new DestrCountRec(count_); }
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~DestrCountRec() { ++count_; }
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private:
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std::atomic<int> &count_;
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};
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// helper function for creating a GC snapshot
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// if given a nullptr it makes a GC snapshot like there
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// are no active transactions
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auto GcSnapshot(tx::EngineSingleNode &engine, tx::Transaction *t) {
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if (t != nullptr) {
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tx::Snapshot gc_snap = t->snapshot();
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gc_snap.insert(t->id_);
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return gc_snap;
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} else {
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return engine.GlobalGcSnapshot();
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}
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}
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