/**************************************************************************\
 * Copyright (c) Kongsberg Oil & Gas Technologies AS
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * 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.
 * 
 * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * 
 * Neither the name of the copyright holder nor the names of its
 * 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
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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\**************************************************************************/

#include "SoQtSignalThread.h"
#include <Inventor/Qt/moc_SoQtSignalThread.icc>

SoQtSignalThread::SoQtSignalThread(void)
  : isstopped(false)
{
}

SoQtSignalThread::~SoQtSignalThread()
{
}

void
SoQtSignalThread::trigger(void)
{
#ifdef SOQT_SIGNAL_THREAD_ACTIVE
  // lock first to make sure the QThread is actually waiting for a signal
  this->mutex.lock();
  this->waitcond.wakeOne();
  this->mutex.unlock();
#endif // SOQT_SIGNAL_THREAD_ACTIVE
}

void
SoQtSignalThread::stopThread(void)
{
#ifdef SOQT_SIGNAL_THREAD_ACTIVE
  this->mutex.lock();
  this->isstopped = true;
  this->waitcond.wakeOne();
  this->mutex.unlock();
#endif // SOQT_SIGNAL_THREAD_ACTIVE
}


void
SoQtSignalThread::run(void)
{
#ifdef SOQT_SIGNAL_THREAD_ACTIVE
  this->mutex.lock();
  while (!this->isstopped) {
    // just wait, and trigger every time we receive a signal
    this->waitcond.wait(&this->mutex);
    if (!this->isstopped) {
      emit triggerSignal();
    }
  }
  this->mutex.unlock();
#endif // SOQT_SIGNAL_THREAD_ACTIVE
}
