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.
 
 
 
 
 

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