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/*
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 DownloadMan.cpp
* @author Gav Wood <i@gavwood.com>
* @date 2014
*/
#include "DownloadMan.h"
using namespace std;
using namespace dev;
using namespace dev::eth;
DownloadSub::DownloadSub(DownloadMan& _man): m_man(&_man)
{
WriteGuard l(m_man->x_subs);
m_man->m_subs.insert(this);
}
DownloadSub::~DownloadSub()
{
if (m_man)
{
WriteGuard l(m_man->x_subs);
m_man->m_subs.erase(this);
}
}
h256Hash DownloadSub::nextFetch(unsigned _n)
{
Guard l(m_fetch);
if (m_remaining.size())
return m_remaining;
m_asked.clear();
m_indices.clear();
m_remaining.clear();
if (!m_man || m_man->chainEmpty())
return h256Hash();
m_asked = (~(m_man->taken() + m_attempted)).lowest(_n);
if (m_asked.empty())
m_asked = (~(m_man->taken(true) + m_attempted)).lowest(_n);
m_attempted += m_asked;
for (auto i: m_asked)
{
auto x = m_man->m_chain[i];
m_remaining.insert(x);
m_indices[x] = i;
}
return m_remaining;
}
bool DownloadSub::noteBlock(h256 _hash)
{
Guard l(m_fetch);
if (m_man && m_indices.count(_hash))
m_man->m_blocksGot += m_indices[_hash];
bool ret = !!m_remaining.count(_hash);
m_remaining.erase(_hash);
return ret;
}