/**************************************************************************\
 * Copyright (c) Kongsberg Oil & Gas Technologies AS
 * All rights reserved.
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 * modification, are permitted provided that the following conditions are
 * met:
 * 
 * Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 * 
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 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
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 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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\**************************************************************************/

#include <QMutexLocker>

#include "SignalThread.h"

using namespace SIM::Coin3D::Quarter;

SignalThread::SignalThread()
  : isstopped(false)
{
}

SignalThread::~SignalThread()
{
}

void
SignalThread::trigger()
{
  // lock first to make sure the QThread is actually waiting for a signal
  QMutexLocker ml(&this->mutex);
  this->waitcond.wakeOne();
}

void
SignalThread::stopThread()
{
  QMutexLocker ml(&this->mutex);
  this->isstopped = true;
  this->waitcond.wakeOne();
}


void
SignalThread::run()
{
  QMutexLocker ml(&this->mutex);
  while (!this->isstopped) {
    // just wait, and trigger every time we receive a signal
    this->waitcond.wait(&this->mutex);
    if (!this->isstopped) {
      Q_EMIT triggerSignal();
    }
  }
}
