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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 "itkMultiThreader.h"
namespace itkSTLThreadTestImpl
{
static int done = 0;
static int numberOfIterations = 10;
static itk::MutexLock::Pointer sharedMutex = 0;
static ITK_THREAD_RETURN_TYPE Runner(void*);
static int Thread(int);
} // namespace itkSTLThreadTestImpl
int itkSTLThreadTest(int argc, char* argv[])
{
// 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();
itkSTLThreadTestImpl::sharedMutex = itk::MutexLock::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;
itk::ThreadIdType threadId = threader->SpawnThread(itkSTLThreadTestImpl::Runner, ITK_NULLPTR);
std::cout << "SpawnThread(itkSTLThreadTestImpl::Runner, results): "
<< threadId << std::endl;
threader->TerminateThread(threadId);
std::cout << "Spawned thread terminated." << std::endl;
return result;
}
namespace itkSTLThreadTestImpl
{
static 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);
itk::ThreadIdType tnum = info->ThreadID;
int* results = static_cast<int*>(info->UserData);
if(results)
{
results[tnum] = itkSTLThreadTestImpl::Thread(tnum);
}
else
{
itkSTLThreadTestImpl::Thread(tnum);
}
return ITK_THREAD_RETURN_VALUE;
}
static int Thread(int tnum)
{
// Implementation in individual thread. We don't care about
// mutexing the output because it doesn't matter for the test.
itkSTLThreadTestImpl::sharedMutex->Lock();
std::cout << "Starting " << tnum << "\n";
itkSTLThreadTestImpl::sharedMutex->Unlock();
// 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.
itkSTLThreadTestImpl::sharedMutex->Lock();
std::cout << tnum << ": " << iteration << "\n";
itkSTLThreadTestImpl::sharedMutex->Unlock();
// 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)
{
itkSTLThreadTestImpl::sharedMutex->Lock();
std::cerr << "Mismatch in thread " << tnum << "!\n";
done = 1;
itkSTLThreadTestImpl::sharedMutex->Unlock();
}
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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