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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkSTLThreadTest.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 "itkMultiThreader.h"
#include <list>
#include <stdlib.h>
namespace itkSTLThreadTestImpl
{
int done = 0;
int numberOfIterations = 10;
ITK_THREAD_RETURN_TYPE Runner(void*);
int Thread(int);
} // namespace itkSTLThreadTestImpl
int itkSTLThreadTest(int argc, char* argv[])
{
// On some old sgi compilers, this test gets into an infinite loop.
#if defined(__sgi) && defined(_COMPILER_VERSION) && _COMPILER_VERSION <= 730
return EXIT_SUCCESS;
#else
// Choose a number of threads.
int numThreads = 10;
if(argc > 1)
{
int nt = atoi(argv[1]);
if(nt > 1)
{
numThreads = nt;
}
}
// Choose a number of iterations (0 is infinite).
if(argc > 2)
{
int ni = atoi(argv[2]);
if(ni >= 0)
{
itkSTLThreadTestImpl::numberOfIterations = ni;
}
}
// Enforce limit on number of threads.
if(numThreads > ITK_MAX_THREADS)
{
numThreads = ITK_MAX_THREADS;
}
// Report what we'll do.
std::cout << "Using " << numThreads << " threads.\n";
if(itkSTLThreadTestImpl::numberOfIterations)
{
std::cout << "Using " << itkSTLThreadTestImpl::numberOfIterations
<< " iterations.\n";
}
else
{
std::cout << "Using infinite iterations.\n";
}
// Create result array. Assume failure.
int* results = new int[numThreads];
int i;
for(i=0; i < numThreads; ++i)
{
results[i] = 0;
}
// Create and execute the threads.
itk::MultiThreader::Pointer threader = itk::MultiThreader::New();
threader->SetSingleMethod(itkSTLThreadTestImpl::Runner, results);
threader->SetNumberOfThreads(numThreads);
threader->SingleMethodExecute();
// Report results.
int result = 0;
for(i=0; i < numThreads; ++i)
{
if(!results[i])
{
std::cerr << "Thread " << i << " failed." << std::endl;
result = 1;
}
}
delete [] results;
// Test other methods for coverage.
std::cout << "Done with primary test. Testing more methods..."
<< std::endl;
threader->SetGlobalMaximumNumberOfThreads(1);
threader->SetGlobalDefaultNumberOfThreads(1);
std::cout << "threader->GetGlobalMaximumNumberOfThreads(): "
<< threader->GetGlobalMaximumNumberOfThreads() << std::endl;
int threadId = threader->SpawnThread(itkSTLThreadTestImpl::Runner, 0);
std::cout << "SpawnThread(itkSTLThreadTestImpl::Runner, results): "
<< threadId << std::endl;
threader->TerminateThread(threadId);
std::cout << "Spawned thread terminated." << std::endl;
return result;
#endif
}
namespace itkSTLThreadTestImpl
{
ITK_THREAD_RETURN_TYPE Runner(void* infoIn)
{
// Get the thread id and result pointer and run the method for this
// thread.
itk::MultiThreader::ThreadInfoStruct* info =
static_cast<itk::MultiThreader::ThreadInfoStruct*>(infoIn);
int tnum = info->ThreadID;
int* results = static_cast<int*>(info->UserData);
if(results)
{
results[tnum] = itkSTLThreadTestImpl::Thread(tnum);
}
else
{
itkSTLThreadTestImpl::Thread(tnum);
}
#ifndef ITK_USE_SPROC
return EXIT_SUCCESS;
#endif
}
int Thread(int tnum)
{
// Implementation in individual thread. We don't care about
// mutexing the output because it doesn't matter for the test.
std::cout << "Starting " << tnum << "\n";
// Create a list with which to play.
std::list<int> l;
// Choose a size for each iteration for this thread.
int count = 10000+100*tnum;
int iteration=0;
while(!done && !(numberOfIterations && (iteration >= numberOfIterations)))
{
// Output progress of this thread.
std::cout << tnum << ": " << iteration << "\n";
// Fill the list.
int j;
for(j=0; j < count; ++j)
{
l.push_back(j);
}
// Empty the list while making sure values match. Threading
// errors can cause mismatches here, which is the purpose of the
// test.
for(j=0; j < count; ++j)
{
if(l.front() != j)
{
std::cerr << "Mismatch in thread " << tnum << "!\n";
done = 1;
}
l.pop_front();
}
++iteration;
}
// Only get here on failure or iterations finished.
if(numberOfIterations && (iteration >= numberOfIterations))
{
// Success.
return EXIT_FAILURE;
}
else
{
// Failure.
return EXIT_SUCCESS;
}
}
} // namespace itkSTLThreadTestImpl
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