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99 lines
2.5 KiB
99 lines
2.5 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 MemoryDB.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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#include <unordered_map>
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#include <libdevcore/Common.h>
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#include <libdevcore/Guards.h>
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#include <libdevcore/FixedHash.h>
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#include <libdevcore/Log.h>
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#include <libdevcore/RLP.h>
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#include "SHA3.h"
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namespace dev
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{
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struct DBChannel: public LogChannel { static const char* name(); static const int verbosity = 18; };
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struct DBWarn: public LogChannel { static const char* name(); static const int verbosity = 1; };
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#define dbdebug clog(DBChannel)
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#define dbwarn clog(DBWarn)
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class MemoryDB
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{
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friend class EnforceRefs;
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public:
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MemoryDB() {}
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MemoryDB(MemoryDB const& _c) { operator=(_c); }
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MemoryDB& operator=(MemoryDB const& _c);
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void clear() { m_main.clear(); } // WARNING !!!! didn't originally clear m_refCount!!!
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std::unordered_map<h256, std::string> get() const;
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std::string lookup(h256 const& _h) const;
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bool exists(h256 const& _h) const;
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void insert(h256 const& _h, bytesConstRef _v);
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bool kill(h256 const& _h);
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void purge();
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bytes lookupAux(h256 const& _h) const;
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void removeAux(h256 const& _h);
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void insertAux(h256 const& _h, bytesConstRef _v);
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h256Hash keys() const;
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protected:
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#if DEV_GUARDED_DB
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mutable SharedMutex x_this;
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#endif
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std::unordered_map<h256, std::pair<std::string, unsigned>> m_main;
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std::unordered_map<h256, std::pair<bytes, bool>> m_aux;
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mutable bool m_enforceRefs = false;
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};
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class EnforceRefs
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{
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public:
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EnforceRefs(MemoryDB const& _o, bool _r): m_o(_o), m_r(_o.m_enforceRefs) { _o.m_enforceRefs = _r; }
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~EnforceRefs() { m_o.m_enforceRefs = m_r; }
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private:
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MemoryDB const& m_o;
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bool m_r;
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};
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inline std::ostream& operator<<(std::ostream& _out, MemoryDB const& _m)
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{
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for (auto const& i: _m.get())
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{
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_out << i.first << ": ";
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_out << RLP(i.second);
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_out << " " << toHex(i.second);
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_out << std::endl;
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}
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return _out;
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}
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}
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