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147 lines
3.6 KiB
147 lines
3.6 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 Ethash.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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* A proof of work algorithm.
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*/
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#pragma once
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#include <chrono>
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#include <thread>
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#include <cstdint>
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#include <libdevcore/CommonIO.h>
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#include "Common.h"
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#include "BlockInfo.h"
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#include "Miner.h"
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class ethash_cl_miner;
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namespace dev
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{
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namespace eth
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{
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class EthashCLHook;
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class Ethash
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{
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public:
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using Miner = GenericMiner<Ethash>;
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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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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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};
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static const WorkPackage NullWorkPackage;
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static std::string name();
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static unsigned revision();
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static void prep(BlockInfo const& _header);
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static bool verify(BlockInfo const& _header);
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static bool preVerify(BlockInfo const& _header);
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static WorkPackage package(BlockInfo const& _header);
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static void assignResult(Solution const& _r, BlockInfo& _header) { _header.nonce = _r.nonce; _header.mixHash = _r.mixHash; }
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class CPUMiner: public Miner, Worker
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{
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public:
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CPUMiner(ConstructionInfo const& _ci): Miner(_ci), Worker("miner" + toString(index())) {}
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static unsigned instances() { return s_numInstances > 0 ? s_numInstances : std::thread::hardware_concurrency(); }
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static std::string platformInfo();
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static void setDefaultPlatform(unsigned) {}
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static void setDefaultDevice(unsigned) {}
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static void setNumInstances(unsigned _instances) { s_numInstances = std::min<unsigned>(_instances, std::thread::hardware_concurrency()); }
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protected:
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void kickOff() override
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{
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stopWorking();
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startWorking();
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}
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void pause() override { stopWorking(); }
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private:
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void workLoop() override;
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static unsigned s_numInstances;
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};
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#if ETH_ETHASHCL || !ETH_TRUE
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class GPUMiner: public Miner, Worker
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{
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friend class dev::eth::EthashCLHook;
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public:
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GPUMiner(ConstructionInfo const& _ci);
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~GPUMiner();
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static unsigned instances() { return s_numInstances > 0 ? s_numInstances : 1; }
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static std::string platformInfo();
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static unsigned getNumDevices();
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static void setDefaultPlatform(unsigned _id) { s_platformId = _id; }
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static void setDefaultDevice(unsigned _id) { s_deviceId = _id; }
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static void setNumInstances(unsigned _instances) { s_numInstances = std::min<unsigned>(_instances, getNumDevices()); }
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protected:
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void kickOff() override;
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void pause() override;
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private:
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void workLoop() override;
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bool report(uint64_t _nonce);
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using Miner::accumulateHashes;
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EthashCLHook* m_hook = nullptr;
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ethash_cl_miner* m_miner = nullptr;
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h256 m_minerSeed; ///< Last seed in m_miner
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static unsigned s_platformId;
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static unsigned s_deviceId;
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static unsigned s_numInstances;
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};
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#else
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using GPUMiner = CPUMiner;
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#endif
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};
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}
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}
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