testMutex.cpp

Test mutexes and threading capabilities.

/****************************************************************************
 *
 * This file is part of the ViSP software.
 * Copyright (C) 2005 - 2017 by Inria. All rights reserved.
 *
 * This software is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * ("GPL") version 2 as published by the Free Software Foundation.
 * See the file LICENSE.txt at the root directory of this source
 * distribution for additional information about the GNU GPL.
 *
 * For using ViSP with software that can not be combined with the GNU
 * GPL, please contact Inria about acquiring a ViSP Professional
 * Edition License.
 *
 * See http://visp.inria.fr for more information.
 *
 * This software was developed at:
 * Inria Rennes - Bretagne Atlantique
 * Campus Universitaire de Beaulieu
 * 35042 Rennes Cedex
 * France
 *
 * If you have questions regarding the use of this file, please contact
 * Inria at visp@inria.fr
 *
 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 * Description:
 * Test threading capabilities.
 *
 * Authors:
 * Fabien Spindler
 *
 *****************************************************************************/

#include <iostream>

#include <visp3/core/vpMutex.h>
#include <visp3/core/vpThread.h>

#if defined(VISP_HAVE_PTHREAD) || (defined(_WIN32) && !defined(WINRT_8_0))

int thread_counter=0;
vpMutex mutex;

vpThread::Return doSomeThing(vpThread::Args args)
{
  mutex.lock();
  unsigned int thread_id = *((unsigned int *) args);

  std::cout << "Started job " << thread_counter << " with id " << thread_id << std::endl;

  for(unsigned long i=0; i<(0xFFFF);i++) {};

  std::cout << "Ended job " << thread_counter << std::endl;

  thread_counter ++;
  mutex.unlock();

  return 0;
}

int main(void)
{
  unsigned int nthread=10;
  vpThread *thread = new vpThread [nthread];
  unsigned int *thread_id = new unsigned int [nthread];

  for(unsigned int i=0; i<nthread; i++)
  {
    thread_id[i] = i;
    thread[i].create((vpThread::Fn)&doSomeThing, (vpThread::Args)&thread_id[i]);
  }

  delete [] thread;
  delete [] thread_id;

  return 0;
}

#else
int main()
{
#  if !defined(_WIN32) && (defined(__unix__) || defined(__unix) || (defined(__APPLE__) && defined(__MACH__))) // UNIX
  std::cout << "You should enable pthread usage and rebuild ViSP..." << std::endl;
#  else
  std::cout << "Multi-threading seems not supported on this platform" << std::endl;
#  endif
}
#endif