ViSP  2.9.0
testTime.cpp

Time management.

/****************************************************************************
*
* $Id: testTime.cpp 4658 2014-02-09 09:50:14Z fspindle $
*
* This file is part of the ViSP software.
* Copyright (C) 2005 - 2014 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://www.irisa.fr/lagadic/visp/visp.html for more information.
*
* This software was developed at:
* INRIA Rennes - Bretagne Atlantique
* Campus Universitaire de Beaulieu
* 35042 Rennes Cedex
* France
* http://www.irisa.fr/lagadic
*
* 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 <visp/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 <iostream>
#include <time.h>
#include <visp/vpTime.h>
#include <visp/vpParseArgv.h>
void usage(const char *name, const char *badparam);
bool getOptions(int argc, const char **argv);
// List of allowed command line options
#define GETOPTARGS "h"
void usage(const char *name, const char *badparam)
{
fprintf(stdout, "\n\
Time management.\n\
\n\
SYNOPSIS\n\
%s [-h]\n", name);
fprintf(stdout, "\n\
OPTIONS: Default\n\
-h\n\
Print the help.\n");
if (badparam)
fprintf(stdout, "\nERROR: Bad parameter [%s]\n", badparam);
}
bool getOptions(int argc, const char **argv)
{
const char *optarg_;
int c;
while ((c = vpParseArgv::parse(argc, argv, GETOPTARGS, &optarg_)) > 1) {
switch (c) {
case 'h': usage(argv[0], NULL); return false; break;
default:
usage(argv[0], optarg_);
return false; break;
}
}
if ((c == 1) || (c == -1)) {
// standalone param or error
usage(argv[0], NULL);
std::cerr << "ERROR: " << std::endl;
std::cerr << " Bad argument " << optarg_ << std::endl << std::endl;
return false;
}
return true;
}
int
main(int argc, const char ** argv)
{
try {
// Read the command line options
if (getOptions(argc, argv) == false) {
exit (-1);
}
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;
}
}