Visual Servoing Platform  version 3.0.1
 All Classes Namespaces Functions Variables Typedefs Enumerations Enumerator Friends Groups Pages
testTime.cpp

Time management.

/****************************************************************************
*
* 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:
* Time management.
*
* Authors:
* Fabien Spindler
*
*****************************************************************************/
#include <visp3/core/vpConfig.h>
#if !defined(_WIN32) && (defined(__unix__) || defined(__unix) || (defined(__APPLE__) && defined(__MACH__))) // UNIX
# include <unistd.h>
#elif defined(_WIN32)
# include <windows.h>
# include <mmsystem.h>
# include <winbase.h>
#endif
#include <stdlib.h>
#include <stdio.h>
#include <time.h>
#include <cmath>
#include <iostream>
#include <visp3/core/vpTime.h>
int main()
{
#if !defined(WINRT)
try {
double v = 0;
double t0 = vpTime::measureTimeMs();
for (int i =0 ; i < 100000; i ++)
for (int j =0 ; j < 100; j ++)
v = i * 2 / 3. + j;
std::cout << "Computed dummy value: " << v << std::endl;
double t1 = vpTime::measureTimeMs();
vpTime::wait(t1, 40);
double t2 = vpTime::measureTimeMs();
// Sleep 10ms
#if !defined(_WIN32) && (defined(__unix__) || defined(__unix) || (defined(__APPLE__) && defined(__MACH__))) // UNIX
usleep(10*1000);
#elif defined(_WIN32)
Sleep(10);
#endif
double t3 = vpTime::measureTimeMs();
// Sleep 2ms
#if !defined(_WIN32) && (defined(__unix__) || defined(__unix) || (defined(__APPLE__) && defined(__MACH__))) // UNIX
usleep(2*1000);
#elif defined(_WIN32)
Sleep(2);
#endif
double t4 = vpTime::measureTimeMs();
vpTime::wait(t4, 19);
double t5 = vpTime::measureTimeMs();
double t6 = vpTime::measureTimeMs();
double t7 = vpTime::measureTimeMs();
double t8 = vpTime::measureTimeMs();
std::cout << "t1-t0: computation time: " << t1 - t0 << std::endl;
std::cout << "t2-t1: wait(t1, 40 ms): " << t2 - t1 << std::endl;
std::cout << "t3-t2: sleep(10 ms): " << t3 - t2 << std::endl;
std::cout << "t4-t3: sleep(2 ms): " << t4 - t3 << std::endl;
std::cout << "t5-t4: wait(t, 19 ms): " << t5 - t4 << std::endl;
std::cout << "t6-t5: wait(5 ms): " << t6 - t5 << std::endl;
std::cout << "t7-t6: wait(21 ms): " << t7 - t6 << std::endl;
std::cout << "t8-t7: wait(2 ms): " << t8 - t7 << std::endl;
return 0;
}
catch(vpException &e) {
std::cout << "Catch an exception: " << e << std::endl;
return 1;
}
# else
std::cout << "vpTime is not implemented on Universal Windows Platform" << std::endl;
# endif
}