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65 lines
1.5 KiB
65 lines
1.5 KiB
/*
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This file is part of cpp-ethereum.
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cpp-ethereum 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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cpp-ethereum 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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You should have received a copy of the GNU General Public License
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along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file OverlayDB.h
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* @author Gav Wood <i@gavwood.com>
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* @date 2014
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*/
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#pragma once
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#pragma warning(push)
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#pragma warning(disable: 4100 4267)
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#include <leveldb/db.h>
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#pragma warning(pop)
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#include <memory>
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#include <libdevcore/Common.h>
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#include <libdevcore/Log.h>
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#include "MemoryDB.h"
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namespace ldb = leveldb;
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namespace dev
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{
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class OverlayDB: public MemoryDB
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{
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public:
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OverlayDB(ldb::DB* _db = nullptr): m_db(_db) {}
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~OverlayDB();
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ldb::DB* db() const { return m_db.get(); }
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void setDB(ldb::DB* _db, bool _clearOverlay = true);
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void commit();
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void rollback();
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std::string lookup(h256 _h) const;
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bool exists(h256 _h) const;
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void kill(h256 _h);
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bytes lookupAux(h256 _h) const;
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private:
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using MemoryDB::clear;
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std::shared_ptr<ldb::DB> m_db;
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ldb::ReadOptions m_readOptions;
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ldb::WriteOptions m_writeOptions;
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};
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}
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