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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 Worker.cpp
* @author Gav Wood <i@gavwood.com>
* @date 2014
*/
#include "Worker.h"
#include <chrono>
#include <thread>
#include "Log.h"
using namespace std;
using namespace dev;
void Worker::startWorking()
{
// cnote << "startWorking for thread" << m_name;
Guard l(x_work);
if (m_work)
{
WorkerState ex = WorkerState::Stopped;
m_state.compare_exchange_strong(ex, WorkerState::Starting);
}
else
{
m_state = WorkerState::Starting;
m_work.reset(new thread([&]()
{
setThreadName(m_name.c_str());
// cnote << "Thread begins";
while (m_state != WorkerState::Killing)
{
WorkerState ex = WorkerState::Starting;
bool ok = m_state.compare_exchange_strong(ex, WorkerState::Started);
// cnote << "Trying to set Started: Thread was" << (unsigned)ex << "; " << ok;
(void)ok;
startedWorking();
// cnote << "Entering work loop...";
workLoop();
// cnote << "Finishing up worker thread...";
doneWorking();
// ex = WorkerState::Stopping;
// m_state.compare_exchange_strong(ex, WorkerState::Stopped);
ex = m_state.exchange(WorkerState::Stopped);
// cnote << "State: Stopped: Thread was" << (unsigned)ex;
if (ex == WorkerState::Killing || ex == WorkerState::Starting)
m_state.exchange(ex);
// cnote << "Waiting until not Stopped...";
DEV_TIMED_ABOVE("Worker stopping", 100)
while (m_state == WorkerState::Stopped)
this_thread::sleep_for(chrono::milliseconds(20));
}
}));
// cnote << "Spawning" << m_name;
}
DEV_TIMED_ABOVE("Start worker", 100)
while (m_state == WorkerState::Starting)
this_thread::sleep_for(chrono::microseconds(20));
}
void Worker::stopWorking()
{
DEV_GUARDED(x_work)
if (m_work)
{
WorkerState ex = WorkerState::Started;
m_state.compare_exchange_strong(ex, WorkerState::Stopping);
DEV_TIMED_ABOVE("Stop worker", 100)
while (m_state != WorkerState::Stopped)
this_thread::sleep_for(chrono::microseconds(20));
}
}
void Worker::terminate()
{
// cnote << "stopWorking for thread" << m_name;
DEV_GUARDED(x_work)
if (m_work)
{
m_state.exchange(WorkerState::Killing);
DEV_TIMED_ABOVE("Terminate worker", 100)
m_work->join();
m_work.reset();
}
}
void Worker::workLoop()
{
while (m_state == WorkerState::Started)
{
if (m_idleWaitMs)
this_thread::sleep_for(chrono::milliseconds(m_idleWaitMs));
doWork();
}
}