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/*=========================================================================
*
* Copyright Insight Software Consortium
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#include <iostream>
#include <cmath>
#include "itkMath.h"
#include "itkRealTimeClock.h"
#include "itkStdStreamStateSave.h"
#include "itkTestingMacros.h"
int itkRealTimeClockTest( int, char * [] )
{
// Save the format stream variables for std::cout
// They will be restored when coutState goes out of scope
// scope.
itk::StdStreamStateSave coutState(std::cout);
try
{
// Create an ITK RealTimeClock
itk::RealTimeClock::Pointer clock = itk::RealTimeClock::New();
EXERCISE_BASIC_OBJECT_METHODS( clock, RealTimeClock, Object );
std::cout << "Testing itk::RealTimeClock" << std::endl;
std::cout << "Frequency: " << clock->GetFrequency() << std::endl;
itk::RealTimeStamp timestamps[5];
std::cout << "Printing timestamps got one by one" << std::endl;
for( unsigned int i = 0; i < 5; ++i )
{
std::cout << clock->GetRealTimeStamp() << std::endl;
}
for( unsigned int i = 0; i < 5; ++i )
{
timestamps[i] = clock->GetRealTimeStamp();
}
std::cout << "Printing timestamps buffered" << std::endl;
for( unsigned int i = 0; i < 5; ++i )
{
std::cout << timestamps[i] << std::endl;
}
// Print out several time stamps
itk::RealTimeStamp realStamp1 = clock->GetRealTimeStamp();
itk::RealTimeStamp realStamp2 = clock->GetRealTimeStamp();
std::cout << "Current Time " << realStamp2 << std::endl;
typedef itk::RealTimeStamp::TimeRepresentationType TimeRepresentationType;
TimeRepresentationType tolerance = 1e6;
for( unsigned int i = 0; i < 10; ++i )
{
realStamp1 = realStamp2;
realStamp2 = clock->GetRealTimeStamp();
itk::RealTimeInterval difference = realStamp2 - realStamp1;
itk::RealTimeStamp::TimeRepresentationType seconds1 = realStamp1.GetTimeInSeconds();
itk::RealTimeStamp::TimeRepresentationType seconds2 = realStamp2.GetTimeInSeconds();
itk::RealTimeStamp::TimeRepresentationType secondsD = difference.GetTimeInSeconds();
itk::RealTimeStamp::TimeRepresentationType secondsE = seconds2 - seconds1;
std::cout << realStamp2 << " - " << realStamp1 << " = ";
std::cout << secondsD << " = " << secondsE << std::endl;
if( std::abs( secondsD - secondsE ) / secondsE > tolerance )
{
std::cerr << "Precision error in time difference" << std::endl;
std::cerr << "Expected " << secondsE << " seconds " << std::endl;
std::cerr << "But got " << secondsD << " seconds " << std::endl;
return EXIT_FAILURE;
}
}
}
catch(...)
{
std::cerr << "Exception caught !!" << std::endl;
return EXIT_FAILURE;
}
std::cout << "[PASSED]" << std::endl;
return EXIT_SUCCESS;
}
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