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89 lines
2.4 KiB
89 lines
2.4 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 EthashCPUMiner.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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* Determines the PoW algorithm.
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*/
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#include "EthashCPUMiner.h"
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#include <thread>
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#include <chrono>
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#include <boost/algorithm/string.hpp>
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#include <random>
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using namespace std;
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using namespace dev;
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using namespace eth;
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unsigned EthashCPUMiner::s_numInstances = 0;
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EthashCPUMiner::EthashCPUMiner(GenericMiner<EthashProofOfWork>::ConstructionInfo const& _ci):
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GenericMiner<EthashProofOfWork>(_ci), Worker("miner" + toString(index()))
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{
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}
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EthashCPUMiner::~EthashCPUMiner()
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{
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}
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void EthashCPUMiner::kickOff()
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{
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stopWorking();
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startWorking();
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}
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void EthashCPUMiner::pause()
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{
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stopWorking();
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}
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void EthashCPUMiner::workLoop()
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{
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auto tid = std::this_thread::get_id();
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static std::mt19937_64 s_eng((time(0) + std::hash<decltype(tid)>()(tid)));
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uint64_t tryNonce = s_eng();
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ethash_return_value ethashReturn;
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WorkPackage w = work();
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EthashAux::FullType dag;
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while (!shouldStop() && !dag)
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{
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while (!shouldStop() && EthashAux::computeFull(w.seedHash, true) != 100)
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this_thread::sleep_for(chrono::milliseconds(500));
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dag = EthashAux::full(w.seedHash, false);
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}
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h256 boundary = w.boundary;
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unsigned hashCount = 1;
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for (; !shouldStop(); tryNonce++, hashCount++)
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{
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ethashReturn = ethash_full_compute(dag->full, *(ethash_h256_t*)w.headerHash.data(), tryNonce);
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h256 value = h256((uint8_t*)ðashReturn.result, h256::ConstructFromPointer);
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if (value <= boundary && submitProof(EthashProofOfWork::Solution{(h64)(u64)tryNonce, h256((uint8_t*)ðashReturn.mix_hash, h256::ConstructFromPointer)}))
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break;
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if (!(hashCount % 100))
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accumulateHashes(100);
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}
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}
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std::string EthashCPUMiner::platformInfo()
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{
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return toString(std::thread::hardware_concurrency()) + "-thread CPU";
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}
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