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https://gitlab.kitware.com/vtk/vtk-m
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b1f288aaea
The only reason Keys has a template is so that it can hold a UniqueKeys array and provide the key for each group. If that is not needed and you want to implement a library function that takes a keys object, you can now grab the Keys superclass KeysBase. KeysBase is not templated, so you can pass it to a standard method in a library.
87 lines
2.6 KiB
C++
87 lines
2.6 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_exec_internal_ReduceByKeyLookup_h
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#define vtk_m_exec_internal_ReduceByKeyLookup_h
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#include <vtkm/cont/ExecutionObjectBase.h>
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#include <vtkm/StaticAssert.h>
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#include <vtkm/Types.h>
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#include <type_traits>
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namespace vtkm
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{
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namespace exec
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{
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namespace internal
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{
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/// A superclass of `ReduceBykeyLookup` that can be used when no key values are provided.
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///
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template <typename IdPortalType, typename IdComponentPortalType>
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struct ReduceByKeyLookupBase
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{
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VTKM_STATIC_ASSERT((std::is_same<typename IdPortalType::ValueType, vtkm::Id>::value));
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VTKM_STATIC_ASSERT(
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(std::is_same<typename IdComponentPortalType::ValueType, vtkm::IdComponent>::value));
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IdPortalType SortedValuesMap;
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IdPortalType Offsets;
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IdComponentPortalType Counts;
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VTKM_EXEC_CONT
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ReduceByKeyLookupBase(const IdPortalType& sortedValuesMap,
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const IdPortalType& offsets,
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const IdComponentPortalType& counts)
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: SortedValuesMap(sortedValuesMap)
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, Offsets(offsets)
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, Counts(counts)
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{
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}
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VTKM_SUPPRESS_EXEC_WARNINGS
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VTKM_EXEC_CONT
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ReduceByKeyLookupBase() {}
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};
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/// \brief Execution object holding lookup info for reduce by key.
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///
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/// A WorkletReduceByKey needs several arrays to map the current output object
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/// to the respective key and group of values. This execution object holds that
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/// state.
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///
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template <typename KeyPortalType, typename IdPortalType, typename IdComponentPortalType>
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struct ReduceByKeyLookup : ReduceByKeyLookupBase<IdPortalType, IdComponentPortalType>
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{
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using KeyType = typename KeyPortalType::ValueType;
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KeyPortalType UniqueKeys;
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VTKM_EXEC_CONT
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ReduceByKeyLookup(const KeyPortalType& uniqueKeys,
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const IdPortalType& sortedValuesMap,
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const IdPortalType& offsets,
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const IdComponentPortalType& counts)
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: ReduceByKeyLookupBase<IdPortalType, IdComponentPortalType>(sortedValuesMap, offsets, counts)
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, UniqueKeys(uniqueKeys)
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{
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}
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VTKM_SUPPRESS_EXEC_WARNINGS
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VTKM_EXEC_CONT
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ReduceByKeyLookup() {}
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};
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}
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}
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} // namespace vtkm::exec::internal
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#endif //vtk_m_exec_internal_ReduceByKeyLookup_h
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