forked from blue/lmdbal
69 lines
2.2 KiB
C++
69 lines
2.2 KiB
C++
/*
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* LMDB Abstraction Layer.
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* Copyright (C) 2023 Yury Gubich <blue@macaw.me>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include "base.h"
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namespace LMDBAL {
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class StorageCommon;
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class CursorCommon;
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class Transaction {
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friend class Base;
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friend class StorageCommon;
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public:
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explicit Transaction();
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explicit Transaction(Transaction&& other);
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Transaction(const Transaction& other) = delete;
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Transaction& operator = (const Transaction& other) = delete;
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Transaction& operator = (Transaction&& other);
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virtual ~Transaction();
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void terminate();
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bool isActive() const;
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protected:
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Transaction(TransactionID txn, const Base* parent);
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void reset();
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void closeCursors();
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protected:
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TransactionID txn; /**<\brief Transaction inner handler*/
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bool active; /**<\brief Transaction state*/
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const Base* parent; /**<\brief Pointer to the database this transaction belongs to*/
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std::map<uint32_t, CursorCommon*> cursors; /**<\brief a collection of cursors curently opened under this transaction*/
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};
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class WriteTransaction : public Transaction {
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friend class Base;
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public:
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explicit WriteTransaction();
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explicit WriteTransaction(WriteTransaction&& other);
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WriteTransaction(const WriteTransaction& other) = delete;
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WriteTransaction& operator = (const WriteTransaction& other) = delete;
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WriteTransaction& operator = (WriteTransaction&& other);
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void commit();
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void abort();
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protected:
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WriteTransaction(TransactionID txn, Base* parent);
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};
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}
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