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/****************************************************************************
*
* ViSP, open source Visual Servoing Platform software.
* Copyright (C) 2005 - 2023 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 as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* 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 https://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.
*
*****************************************************************************/
/*!
\example testTime.cpp
\brief Time management.
*/
#include <visp3/core/vpConfig.h>
#if !defined(_WIN32) && (defined(__unix__) || defined(__unix) || (defined(__APPLE__) && defined(__MACH__))) // UNIX
#include <unistd.h>
#elif defined(_WIN32)
// #include <mmsystem.h>
// #include <winbase.h>
#include <windows.h>
#endif
#include <cmath>
#include <iostream>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#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();
vpTime::wait(5);
vpChrono chrono;
chrono.start();
double t6 = vpTime::measureTimeMs();
vpTime::wait(21);
chrono.stop();
chrono.start(false);
double t7 = vpTime::measureTimeMs();
vpTime::wait(2);
double t8 = vpTime::measureTimeMs();
chrono.stop();
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;
std::cout << "t8-t6: ; chrono: " << chrono.getDurationMs() << std::endl;
return EXIT_SUCCESS;
} catch (const vpException &e) {
std::cout << "Catch an exception: " << e << std::endl;
return EXIT_FAILURE;
}
#else
std::cout << "vpTime is not implemented on Universal Windows Platform" << std::endl;
#endif
}
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