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https://gitlab.kitware.com/vtk/vtk-m
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64 lines
2.3 KiB
C++
64 lines
2.3 KiB
C++
//============================================================================
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// Copyright (c) Kitware, Inc.
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// All rights reserved.
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// See LICENSE.txt for details.
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//
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// This software is distributed WITHOUT ANY WARRANTY; without even
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// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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// PURPOSE. See the above copyright notice for more information.
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//============================================================================
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#ifndef vtk_m_examples_multibackend_MultiDeviceGradient_h
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#define vtk_m_examples_multibackend_MultiDeviceGradient_h
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#include <vtkm/filter/FilterField.h>
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#include "TaskQueue.h"
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#include <thread>
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using RuntimeTaskQueue = TaskQueue<std::function<void()>>;
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/// \brief Construct a MultiDeviceGradient for a given partitioned dataset
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///
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/// The Policy used with MultiDeviceGradient must include the TBB and CUDA
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/// backends.
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class MultiDeviceGradient : public vtkm::filter::FilterField<MultiDeviceGradient>
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{
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public:
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using SupportedTypes = vtkm::List<vtkm::Float32, vtkm::Float64, vtkm::Vec3f_32, vtkm::Vec3f_64>;
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//Construct a MultiDeviceGradient and worker pool
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VTKM_CONT
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MultiDeviceGradient();
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//Needed so that we can shut down the worker pool properly
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VTKM_CONT
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~MultiDeviceGradient();
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/// When this flag is on (default is off), the gradient filter will provide a
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/// point based gradients, which are significantly more costly since for each
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/// point we need to compute the gradient of each cell that uses it.
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void SetComputePointGradient(bool enable) { ComputePointGradient = enable; }
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bool GetComputePointGradient() const { return ComputePointGradient; }
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/// Will submit each block to a work queue that the threads will
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/// pull work from
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template <typename DerivedPolicy>
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VTKM_CONT vtkm::cont::PartitionedDataSet PrepareForExecution(
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const vtkm::cont::PartitionedDataSet&,
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const vtkm::filter::PolicyBase<DerivedPolicy>&);
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private:
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bool ComputePointGradient;
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RuntimeTaskQueue Queue;
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std::vector<std::thread> Workers;
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};
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#ifndef vtk_m_examples_multibackend_MultiDeviceGradient_cxx
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extern template vtkm::cont::PartitionedDataSet MultiDeviceGradient::PrepareForExecution<
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vtkm::filter::PolicyDefault>(const vtkm::cont::PartitionedDataSet&,
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const vtkm::filter::PolicyBase<vtkm::filter::PolicyDefault>&);
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#endif
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#endif
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