57f1b40d8d
Summary: Modification to MVCC - CHECK! Refactor transaction_read Add automatic commit/abort functionality to graph_db_accessor. Fix failing test in graph_db_accessor. Reviewers: buda, dtomicevic, florijan Reviewed By: buda, florijan Subscribers: pullbot Differential Revision: https://phabricator.memgraph.io/D87
49 lines
1.3 KiB
C++
49 lines
1.3 KiB
C++
#include "transactions/transaction.hpp"
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#include <chrono> // std::chrono::seconds
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#include <thread> // std::this_thread::sleep_for
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#include "transactions/engine.hpp"
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namespace tx {
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Transaction::Transaction(Engine &engine)
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: Transaction(Id(), Snapshot<Id>(), engine) {}
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Transaction::Transaction(const Id &&id, const Snapshot<Id> &&snapshot,
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Engine &engine)
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: id(id), cid(1), engine(engine), snapshot(std::move(snapshot)) {}
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Transaction::Transaction(const Id &id, const Snapshot<Id> &snapshot,
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Engine &engine)
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: id(id), cid(1), engine(engine), snapshot(snapshot) {}
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void Transaction::wait_for_active() {
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while (snapshot.size() > 0) {
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auto sid = snapshot.back();
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while (engine.clog.fetch_info(sid).is_active()) {
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std::this_thread::sleep_for(std::chrono::microseconds(100));
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}
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snapshot.remove(sid);
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}
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}
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void Transaction::take_lock(RecordLock &lock) { locks.take(&lock, id); }
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void Transaction::commit() { engine.commit(*this); }
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void Transaction::abort() { engine.abort(*this); }
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bool Transaction::all_finished() {
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return !engine.clog.is_active(id) && snapshot.all_finished(engine);
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}
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bool Transaction::in_snapshot(const Id &id) const {
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return snapshot.is_active(id);
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}
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Id Transaction::oldest_active() {
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return snapshot.oldest_active().take_or(Id(id));
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}
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}
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