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.
119 lines
2.8 KiB
119 lines
2.8 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 MemoryDB.cpp
|
|
* @author Gav Wood <i@gavwood.com>
|
|
* @date 2014
|
|
*/
|
|
|
|
#include <libdevcore/Common.h>
|
|
#include "MemoryDB.h"
|
|
using namespace std;
|
|
using namespace dev;
|
|
using namespace dev::eth;
|
|
|
|
namespace dev
|
|
{
|
|
namespace eth
|
|
{
|
|
|
|
std::map<h256, std::string> MemoryDB::get() const
|
|
{
|
|
if (!m_enforceRefs)
|
|
return m_over;
|
|
std::map<h256, std::string> ret;
|
|
for (auto const& i: m_refCount)
|
|
if (i.second)
|
|
ret.insert(*m_over.find(i.first));
|
|
return ret;
|
|
}
|
|
|
|
std::string MemoryDB::lookup(h256 _h) const
|
|
{
|
|
auto it = m_over.find(_h);
|
|
if (it != m_over.end())
|
|
{
|
|
if (!m_enforceRefs || (m_refCount.count(it->first) && m_refCount.at(it->first)))
|
|
return it->second;
|
|
// else if (m_enforceRefs && m_refCount.count(it->first) && !m_refCount.at(it->first))
|
|
// cnote << "Lookup required for value with no refs. Let's hope it's in the DB." << _h.abridged();
|
|
}
|
|
return std::string();
|
|
}
|
|
|
|
bool MemoryDB::exists(h256 _h) const
|
|
{
|
|
auto it = m_over.find(_h);
|
|
if (it != m_over.end() && (!m_enforceRefs || (m_refCount.count(it->first) && m_refCount.at(it->first))))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
void MemoryDB::insert(h256 _h, bytesConstRef _v)
|
|
{
|
|
m_over[_h] = _v.toString();
|
|
m_refCount[_h]++;
|
|
#if ETH_PARANOIA
|
|
dbdebug << "INST" << _h.abridged() << "=>" << m_refCount[_h];
|
|
#endif
|
|
}
|
|
|
|
bool MemoryDB::kill(h256 _h)
|
|
{
|
|
if (m_refCount.count(_h))
|
|
{
|
|
if (m_refCount[_h] > 0)
|
|
--m_refCount[_h];
|
|
#if ETH_PARANOIA
|
|
else
|
|
{
|
|
// If we get to this point, then there was probably a node in the level DB which we need to remove and which we have previously
|
|
// used as part of the memory-based MemoryDB. Nothing to be worried about *as long as the node exists in the DB*.
|
|
dbdebug << "NOKILL-WAS" << _h.abridged();
|
|
return false;
|
|
}
|
|
dbdebug << "KILL" << _h.abridged() << "=>" << m_refCount[_h];
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
dbdebug << "NOKILL" << _h.abridged();
|
|
return false;
|
|
}
|
|
#else
|
|
}
|
|
return true;
|
|
#endif
|
|
}
|
|
|
|
void MemoryDB::purge()
|
|
{
|
|
for (auto const& i: m_refCount)
|
|
if (!i.second)
|
|
m_over.erase(i.first);
|
|
}
|
|
|
|
set<h256> MemoryDB::keys() const
|
|
{
|
|
set<h256> ret;
|
|
for (auto const& i: m_refCount)
|
|
if (i.second)
|
|
ret.insert(i.first);
|
|
return ret;
|
|
}
|
|
|
|
}
|
|
}
|
|
|