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/*=========================================================================
*
* Copyright NumFOCUS
*
* 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
*
* https://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 "itkMultiThreaderBase.h"
#include "itkTimeProbe.h"
#include "itkConfigure.h"
#include <mutex>
std::shared_ptr<std::mutex> sharedMutex;
bool debugPrint = false;
ITK_THREAD_RETURN_FUNCTION_CALL_CONVENTION
execute(void * ptr)
{
// Here - get any args from ptr.
auto * workUnitInfo = static_cast<itk::MultiThreaderBase::WorkUnitInfo *>(ptr);
auto * data = static_cast<int *>(workUnitInfo->UserData);
sharedMutex->lock();
if (debugPrint)
{
std::cout << "Pointer:" << ptr << " Value: " << *data << " WUID: " << workUnitInfo->WorkUnitID << std::endl;
}
sharedMutex->unlock();
int n = 10;
int m = *data;
double sum = 1.0;
for (int j = 0; j < m; ++j)
{
sum = 1.0;
for (int i = 1; i <= n; ++i)
{
sum = sum + i + j;
}
}
return ITK_THREAD_RETURN_DEFAULT_VALUE;
}
int
itkMultithreadingTest(int argc, char * argv[])
{
sharedMutex = std::make_shared<std::mutex>();
int count = 10000;
if (argc > 1)
{
const int nt = std::stoi(argv[1]);
if (nt > 1)
{
count = nt;
}
}
if (argc > 2)
{
debugPrint = std::stoi(argv[2]);
}
itk::MultiThreaderBase::Pointer threader = itk::MultiThreaderBase::New();
if (threader.IsNull())
{
return EXIT_FAILURE;
}
itk::TimeProbe timeProbe;
itk::TimeProbe::TimeStampType startTime = timeProbe.GetInstantValue();
int data = 123;
for (int i = 0; i < count; ++i)
{
threader->SetSingleMethod(&execute, &data);
threader->SingleMethodExecute();
}
itk::TimeProbe::TimeStampType elapsed = timeProbe.GetInstantValue() - startTime;
std::cout << std::endl << " Thread pool test : Time elapsed : " << elapsed << std::endl;
return EXIT_SUCCESS;
}
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