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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkSemaphoreTest.cxx,v $
Language: C++
Date: $Date: 2007-08-20 13:00:21 $
Version: $Revision: 1.6 $
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 <iostream>
#include "itkSemaphore.h"
#include "itkMultiThreader.h"
struct SemaphoreTestUserData
{
itk::Semaphore::Pointer m_Sem;
bool m_Flag;
};
ITK_THREAD_RETURN_TYPE print_message_function( void *ptr )
{
int threadID = ( (itk::MultiThreader::ThreadInfoStruct *)(ptr) )->ThreadID;
SemaphoreTestUserData *data = static_cast<SemaphoreTestUserData *>(
( (itk::MultiThreader::ThreadInfoStruct *)(ptr) )->UserData );
if (threadID == 0)
{
data->m_Flag = true;
data->m_Sem->Up(); // unblock if thread 1 is waiting
}
else
{
data->m_Sem->Down();// block if thread 1 reaches here first
data->m_Flag = false;
}
return ITK_THREAD_RETURN_VALUE;
}
int itkSemaphoreTest(int, char*[])
{
SemaphoreTestUserData sem;
sem.m_Sem = itk::Semaphore::New();
sem.m_Flag = false;
try
{
sem.m_Sem->Initialize(0);
itk::MultiThreader::Pointer multithreader = itk::MultiThreader::New();
multithreader->SetNumberOfThreads(2);
multithreader->SetSingleMethod( print_message_function, &sem);
for (unsigned int i = 0; i < 2000; i++)
{
multithreader->SingleMethodExecute();
if ( sem.m_Flag == true ) // flag should always be false
{
std::cerr << "[TEST FAILED]" << std::endl;
return EXIT_FAILURE;
}
}
sem.m_Sem->Remove();
}
catch (itk::ExceptionObject &e)
{
std::cerr << e << std::endl;
return 2;
}
std::cout << "[TEST PASSED]" << std::endl;
return EXIT_SUCCESS;
}
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