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102 lines
2.2 KiB
102 lines
2.2 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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#pragma once
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#include <condition_variable>
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#include <libethash/ethash.h>
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#include <libdevcore/Log.h>
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#include <libdevcore/Worker.h>
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#include "BlockHeader.h"
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namespace dev
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{
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namespace eth
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{
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struct Solution
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{
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Nonce nonce;
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h256 mixHash;
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};
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struct Result
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{
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h256 value;
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h256 mixHash;
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};
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struct WorkPackage
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{
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WorkPackage() = default;
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WorkPackage(BlockHeader const& _bh) :
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boundary(_bh.boundary()),
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headerHash(_bh.hashWithout()),
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seedHash(_bh.seedHash())
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{ }
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void reset() { headerHash = h256(); }
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operator bool() const { return headerHash != h256(); }
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h256 boundary;
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h256 headerHash; ///< When h256() means "pause until notified a new work package is available".
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h256 seedHash;
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uint64_t startNonce = 0;
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int exSizeBits = -1;
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};
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class EthashAux
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{
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public:
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static EthashAux* get();
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struct LightAllocation
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{
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LightAllocation(h256 const& _seedHash);
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~LightAllocation();
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bytesConstRef data() const;
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Result compute(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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static h256 seedHash(unsigned _number);
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static uint64_t number(h256 const& _seedHash);
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static LightType light(h256 const& _seedHash);
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static Result eval(h256 const& _seedHash, h256 const& _headerHash, Nonce const& _nonce) noexcept;
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private:
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EthashAux() = default;
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Mutex x_lights;
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std::unordered_map<h256, LightType> m_lights;
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Mutex x_epochs;
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std::unordered_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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