/*
 * Copyright (C) 2015 by Multi-Tech Systems
 *
 * This file is part of libmts.
 *
 * libmts is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * libmts 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with libmts.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#include <mts/MTS_SignalThread.h>
#include <mts/MTS_Logger.h>

using namespace MTS;

SignalThread::SignalThread(const std::string& name)
: Thread(name, true)
, m_bShouldExecute(false)
, m_bCurrentlyExecuting(false)
, m_ui32WaitMillis(200)
{
	init();
}

SignalThread::SignalThread(const std::string& name, uint32_t waitMillis)
: Thread(name, true)
, m_bShouldExecute(false)
, m_bCurrentlyExecuting(false)
, m_ui32WaitMillis(waitMillis)
{
	init();
}

void SignalThread::init()
{
	printConfig("SignalThread| %s - starting up", Thread::getName().c_str());
	m_apStateLock.reset(new MTS::Lock);
	m_apConditionLock.reset(new MTS::Lock);
	m_apCondition.reset(m_apConditionLock->createCondition());
}

SignalThread::~SignalThread()
{
	stop();
	m_apStateLock.reset();
	m_apConditionLock.reset();
	m_apCondition.reset();
	printConfig("SignalThread| %s - shutting down", Thread::getName().c_str());
}

void SignalThread::signal()
{
	m_apConditionLock->lock();
	m_bShouldExecute = true;
	m_apCondition->signal();
	m_apConditionLock->unlock();
}

void SignalThread::run()
{
	while (! Thread::isCanceled())
	{
		m_apConditionLock->lock();
		if (! m_bShouldExecute)
		{
			m_apCondition->wait(m_ui32WaitMillis);
		}
		if (m_bShouldExecute)
		{
			printTrace("SignalThread| %s - starting execute() function", Thread::getName().c_str());
			m_apStateLock->lock();
			m_bCurrentlyExecuting = true;
			m_apStateLock->unlock();
			execute();
			m_apStateLock->lock();
			m_bCurrentlyExecuting = false;
			m_apStateLock->unlock();
			printTrace("SignalThread| %s - finished execute() function", Thread::getName().c_str());
		}
		m_bShouldExecute = false;
		m_apConditionLock->unlock();
	}
}

bool SignalThread::isExecuting() const
{
	bool retval = false;
	m_apStateLock->lock();
	retval = m_bCurrentlyExecuting;
	m_apStateLock->unlock();

	return retval;
}