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88 lines
2.7 KiB
88 lines
2.7 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 EthashAux.cpp
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* @author Gav Wood <i@gavwood.com>
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* @date 2014
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*/
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#include <libethash/ethash.h>
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#include "Ethash.h"
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namespace dev
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{
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namespace eth{
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class EthashAux
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{
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public:
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~EthashAux();
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static EthashAux* get() { if (!s_this) s_this = new EthashAux(); return s_this; }
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struct FullAllocation
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{
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FullAllocation(bytesConstRef _d): data(_d) {}
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~FullAllocation() { delete [] data.data(); }
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Ethash::Result compute(h256 const& _seedHash, h256 const& _headerHash, Nonce const& _nonce) const;
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bytesConstRef const data;
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};
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struct LightAllocation
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{
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LightAllocation(h256 const& _seed);
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~LightAllocation();
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bytesConstRef data() const { return bytesConstRef((byte const*)light, size); }
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Ethash::Result compute(h256 const& _seedHash, h256 const& _headerHash, Nonce const& _nonce) const;
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ethash_light_t light;
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uint64_t size;
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};
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using LightType = std::shared_ptr<LightAllocation>;
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using FullType = std::shared_ptr<FullAllocation>;
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static h256 seedHash(unsigned _number);
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static ethash_params params(BlockInfo const& _header);
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static ethash_params params(h256 const& _seedHash);
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static ethash_params params(unsigned _n);
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static LightType light(BlockInfo const& _header);
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static LightType light(h256 const& _seedHash);
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static FullType full(BlockInfo const& _header, bytesRef _dest = bytesRef(), bool _createIfMissing = true);
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static FullType full(h256 const& _header, bytesRef _dest = bytesRef(), bool _createIfMissing = true);
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static Ethash::Result eval(BlockInfo const& _header) { return eval(_header, _header.nonce); }
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static Ethash::Result eval(BlockInfo const& _header, Nonce const& _nonce);
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static Ethash::Result eval(h256 const& _seedHash, h256 const& _headerHash, Nonce const& _nonce);
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private:
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EthashAux() {}
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void killCache(h256 const& _s);
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static EthashAux* s_this;
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RecursiveMutex x_this;
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std::map<h256, std::shared_ptr<LightAllocation>> m_lights;
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std::map<h256, std::weak_ptr<FullAllocation>> m_fulls;
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FullType m_lastUsedFull;
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Mutex x_epochs;
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std::map<h256, unsigned> m_epochs;
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h256s m_seedHashes;
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};
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}
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}
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