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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkBarrierTest.cxx
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#if defined(_MSC_VER)
#pragma warning ( disable : 4786 )
#endif
#include "itkBarrier.h"
#include "itkMultiThreader.h"
#include "itkMutexLock.h"
#include <stdlib.h>
class BarrierTestUserData
{
public:
itk::Barrier::Pointer m_FirstBarrier;
itk::Barrier::Pointer m_SecondBarrier;
unsigned int m_Counter[3];
unsigned int m_NumberOfIterations;
bool m_TestFailure;
BarrierTestUserData( unsigned int number_of_threads)
{
m_TestFailure = false;
for (unsigned int i = 0; i < 3; i++)
{ m_Counter[i] = 0; }
m_NumberOfIterations = 50;
m_FirstBarrier = itk::Barrier::New();
m_SecondBarrier = itk::Barrier::New();
m_FirstBarrier->Initialize(number_of_threads);
m_SecondBarrier->Initialize(number_of_threads);
}
~BarrierTestUserData() {}
};
ITK_THREAD_RETURN_TYPE BarrierTestIncrement( void *ptr )
{
int threadID = ( (itk::MultiThreader::ThreadInfoStruct *)(ptr) )->ThreadID;
BarrierTestUserData *data = static_cast<BarrierTestUserData *>(
( (itk::MultiThreader::ThreadInfoStruct *)(ptr) )->UserData );
for (unsigned int i = 0; i < data->m_NumberOfIterations; i++)
{
// set the value for this iteration
data->m_Counter[threadID] = i;
// wait for all the other threads
data->m_FirstBarrier->Wait();
data->m_SecondBarrier->Wait();
}
return ITK_THREAD_RETURN_VALUE;
}
ITK_THREAD_RETURN_TYPE BarrierCheckIncrement( void *ptr )
{
BarrierTestUserData *data = static_cast<BarrierTestUserData *>(
( (itk::MultiThreader::ThreadInfoStruct *)(ptr) )->UserData );
for (unsigned int i = 0; i < data->m_NumberOfIterations; i++)
{
// Wait for other threads to populate the m_Counter array
data->m_FirstBarrier->Wait();
// Check the values in the m_Counter array
for (unsigned int j = 0; j < 3; j++ )
{
if (data->m_Counter[j] != i)
{
data->m_TestFailure = true;
}
}
data->m_SecondBarrier->Wait();
}
return ITK_THREAD_RETURN_VALUE;
}
ITK_THREAD_RETURN_TYPE BarrierTestCallback( void *ptr )
{
int threadID = ( (itk::MultiThreader::ThreadInfoStruct *)(ptr) )->ThreadID;
if (threadID == 3)
{
BarrierCheckIncrement( ptr );
}
else
{
BarrierTestIncrement( ptr );
}
return ITK_THREAD_RETURN_VALUE;
}
ITK_THREAD_RETURN_TYPE BarrierSpecialTest( void *ptr )
{
BarrierTestUserData *data = static_cast<BarrierTestUserData *>(
( (itk::MultiThreader::ThreadInfoStruct *)(ptr) )->UserData );
for (unsigned int j = 0; j < 1000; j++ )
{
data->m_FirstBarrier->Wait();
}
return ITK_THREAD_RETURN_VALUE;
}
int itkBarrierTest(int argc, char *argv[])
{
int number_of_threads = 4;
if (argc > 1)
{
number_of_threads = ::atoi(argv[1]);
}
BarrierTestUserData data(number_of_threads);
try
{
itk::MultiThreader::Pointer multithreader = itk::MultiThreader::New();
multithreader->SetNumberOfThreads(number_of_threads);
multithreader->SetSingleMethod( BarrierTestCallback, &data);
for (unsigned int i = 0; i < 5; i++)
{
multithreader->SingleMethodExecute();
}
// perform another test
// multithreader->SetSingleMethod( BarrierSpecialTest, &data);
// multithreader->SingleMethodExecute();
}
catch (itk::ExceptionObject &e)
{
std::cerr << e << std::endl;
return EXIT_FAILURE;
}
if (data.m_TestFailure == false)
{
std::cout << "[TEST PASSED]" << std::endl;
return EXIT_SUCCESS;
}
else
{
std::cout << "[TEST FAILED]" << std::endl;
return 2;
}
}
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