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122 lines
3.0 KiB
122 lines
3.0 KiB
/*
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This file is part of cpp-ethereum.
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cpp-ethereum is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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cpp-ethereum is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file Worker.cpp
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* @author Gav Wood <i@gavwood.com>
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* @date 2014
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*/
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#include "Worker.h"
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#include <chrono>
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#include <thread>
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#include "Log.h"
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using namespace std;
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using namespace dev;
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void Worker::startWorking()
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{
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// cnote << "startWorking for thread" << m_name;
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Guard l(x_work);
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if (m_work)
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{
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WorkerState ex = WorkerState::Stopped;
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m_state.compare_exchange_strong(ex, WorkerState::Starting);
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}
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else
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{
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m_state = WorkerState::Starting;
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m_work.reset(new thread([&]()
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{
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setThreadName(m_name.c_str());
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// cnote << "Thread begins";
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while (m_state != WorkerState::Killing)
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{
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WorkerState ex = WorkerState::Starting;
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bool ok = m_state.compare_exchange_strong(ex, WorkerState::Started);
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// cnote << "Trying to set Started: Thread was" << (unsigned)ex << "; " << ok;
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(void)ok;
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try
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{
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startedWorking();
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workLoop();
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doneWorking();
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}
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catch (std::exception const& _e)
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{
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clog(WarnChannel) << "Exception thrown in Worker thread: " << _e.what();
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}
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// ex = WorkerState::Stopping;
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// m_state.compare_exchange_strong(ex, WorkerState::Stopped);
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ex = m_state.exchange(WorkerState::Stopped);
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// cnote << "State: Stopped: Thread was" << (unsigned)ex;
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if (ex == WorkerState::Killing || ex == WorkerState::Starting)
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m_state.exchange(ex);
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// cnote << "Waiting until not Stopped...";
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DEV_TIMED_ABOVE("Worker stopping", 100)
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while (m_state == WorkerState::Stopped)
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this_thread::sleep_for(chrono::milliseconds(20));
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}
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}));
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// cnote << "Spawning" << m_name;
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}
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DEV_TIMED_ABOVE("Start worker", 100)
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while (m_state == WorkerState::Starting)
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this_thread::sleep_for(chrono::microseconds(20));
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}
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void Worker::stopWorking()
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{
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DEV_GUARDED(x_work)
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if (m_work)
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{
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WorkerState ex = WorkerState::Started;
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m_state.compare_exchange_strong(ex, WorkerState::Stopping);
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DEV_TIMED_ABOVE("Stop worker", 100)
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while (m_state != WorkerState::Stopped)
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this_thread::sleep_for(chrono::microseconds(20));
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}
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}
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void Worker::terminate()
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{
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// cnote << "stopWorking for thread" << m_name;
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DEV_GUARDED(x_work)
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if (m_work)
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{
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m_state.exchange(WorkerState::Killing);
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DEV_TIMED_ABOVE("Terminate worker", 100)
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m_work->join();
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m_work.reset();
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}
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}
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void Worker::workLoop()
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{
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while (m_state == WorkerState::Started)
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{
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if (m_idleWaitMs)
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this_thread::sleep_for(chrono::milliseconds(m_idleWaitMs));
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doWork();
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}
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}
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