You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
110 lines
3.5 KiB
110 lines
3.5 KiB
/*
|
|
This file is part of cpp-ethereum.
|
|
|
|
cpp-ethereum is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
cpp-ethereum is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
/** @file EthashAux.cpp
|
|
* @author Gav Wood <i@gavwood.com>
|
|
* @date 2014
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <condition_variable>
|
|
#include <libethash/ethash.h>
|
|
#include <libdevcore/Worker.h>
|
|
#include "Ethash.h"
|
|
|
|
namespace dev
|
|
{
|
|
namespace eth
|
|
{
|
|
|
|
struct DAGChannel: public LogChannel { static const char* name(); static const int verbosity = 1; };
|
|
|
|
class EthashAux
|
|
{
|
|
public:
|
|
~EthashAux();
|
|
|
|
static EthashAux* get() { if (!s_this) s_this = new EthashAux(); return s_this; }
|
|
|
|
struct LightAllocation
|
|
{
|
|
LightAllocation(h256 const& _seedHash);
|
|
~LightAllocation();
|
|
bytesConstRef data() const;
|
|
Ethash::Result compute(h256 const& _headerHash, Nonce const& _nonce) const;
|
|
ethash_light_t light;
|
|
uint64_t size;
|
|
};
|
|
|
|
struct FullAllocation
|
|
{
|
|
FullAllocation(ethash_light_t _light, ethash_callback_t _cb);
|
|
~FullAllocation();
|
|
Ethash::Result compute(h256 const& _headerHash, Nonce const& _nonce) const;
|
|
bytesConstRef data() const;
|
|
uint64_t size() const { return ethash_full_dag_size(full); }
|
|
ethash_full_t full;
|
|
};
|
|
|
|
using LightType = std::shared_ptr<LightAllocation>;
|
|
using FullType = std::shared_ptr<FullAllocation>;
|
|
|
|
static h256 seedHash(unsigned _number);
|
|
static uint64_t number(h256 const& _seedHash);
|
|
static uint64_t cacheSize(BlockInfo const& _header);
|
|
|
|
static LightType light(h256 const& _seedHash);
|
|
|
|
static const uint64_t NotGenerating = (uint64_t)-1;
|
|
/// Kicks off generation of DAG for @a _seedHash and @returns false or @returns true if ready.
|
|
static unsigned computeFull(h256 const& _seedHash, bool _createIfMissing = true);
|
|
/// Information on the generation progress.
|
|
static std::pair<uint64_t, unsigned> fullGeneratingProgress() { return std::make_pair(get()->m_generatingFullNumber, get()->m_fullProgress); }
|
|
/// Kicks off generation of DAG for @a _blocknumber and blocks until ready; @returns result or empty pointer if not existing and _createIfMissing is false.
|
|
static FullType full(h256 const& _seedHash, bool _createIfMissing = false, std::function<int(unsigned)> const& _f = std::function<int(unsigned)>());
|
|
|
|
static Ethash::Result eval(BlockInfo const& _header) { return eval(_header, _header.nonce); }
|
|
static Ethash::Result eval(BlockInfo const& _header, Nonce const& _nonce);
|
|
static Ethash::Result eval(h256 const& _seedHash, h256 const& _headerHash, Nonce const& _nonce);
|
|
|
|
private:
|
|
EthashAux() {}
|
|
|
|
/// Kicks off generation of DAG for @a _blocknumber and blocks until ready; @returns result.
|
|
|
|
void killCache(h256 const& _s);
|
|
|
|
static EthashAux* s_this;
|
|
|
|
SharedMutex x_lights;
|
|
std::unordered_map<h256, std::shared_ptr<LightAllocation>> m_lights;
|
|
|
|
Mutex x_fulls;
|
|
std::condition_variable m_fullsChanged;
|
|
std::unordered_map<h256, std::weak_ptr<FullAllocation>> m_fulls;
|
|
FullType m_lastUsedFull;
|
|
std::unique_ptr<std::thread> m_fullGenerator;
|
|
uint64_t m_generatingFullNumber = NotGenerating;
|
|
unsigned m_fullProgress;
|
|
|
|
Mutex x_epochs;
|
|
std::unordered_map<h256, unsigned> m_epochs;
|
|
h256s m_seedHashes;
|
|
};
|
|
|
|
}
|
|
}
|
|
|