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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 <cstdlib>
#include "itkCommand.h"
#include "itkAbsImageFilter.h"
class ShowProgress : public itk::Command
{
public:
itkNewMacro(ShowProgress);
void
Execute(itk::Object * caller, const itk::EventObject & event) override
{
Execute((const itk::Object *)caller, event);
}
void
Execute(const itk::Object * caller, const itk::EventObject & event) override
{
if (!itk::ProgressEvent().CheckEvent(&event))
{
return;
}
const auto * processObject = dynamic_cast<const itk::ProcessObject *>(caller);
if (!processObject)
{
return;
}
std::cout << ' ' << processObject->GetProgress();
}
};
int
itkMultiThreaderParallelizeArrayTest(int argc, char * argv[])
{
itk::MultiThreaderBase::Pointer mt = itk::MultiThreaderBase::New();
if (mt.IsNull())
{
std::cerr << "MultiThreaderBase could not be instantiated!" << std::endl;
return EXIT_FAILURE;
}
if (argc >= 2)
{
unsigned int workUnitCount = static_cast<unsigned int>(std::stoi(argv[1]));
mt->SetNumberOfWorkUnits(workUnitCount);
}
constexpr unsigned int size = 1029;
std::vector<unsigned int> vec(size);
using SomeProcessObject = itk::AbsImageFilter<itk::Image<char>, itk::Image<char>>;
auto progressPO = SomeProcessObject::New();
auto showProgress = ShowProgress::New();
progressPO->AddObserver(itk::ProgressEvent(), showProgress);
mt->ParallelizeArray(
1, size, [&vec](int i) { vec[i] = i; }, progressPO);
int result = EXIT_SUCCESS;
if (vec[0] != 0)
{
std::cerr << "vec[0] was modified!" << std::endl;
result = EXIT_FAILURE;
}
for (unsigned int i = 1; i < size; ++i)
{
if (vec[i] != i)
{
std::cerr << "vec[" << i << "] is not " << i << ", but " << vec[i] << std::endl;
result = EXIT_FAILURE;
}
}
if (result != EXIT_FAILURE)
{
std::cout << "\nTest PASSED" << std::endl;
}
return result;
}
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