mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-20 02:55:47 +00:00
21db210a73
The `Variant` class is templated to hold objects of other types. Depending on whether those objects of are meant to be used in the control or execution side, the methods on `Variant` might need to be declared with (or without) special modifiers. We can sometimes try to compile the `Variant` methods for both host and device and ask the device compiler to ignore incompatibilities, but that does not always work. To get around that, create two different implementations of `Variant`. Their API and implementation is exactly the same except one declares its methods with `VTKM_CONT` and the other its methods `VTKM_EXEC`.
594 lines
18 KiB
C++
594 lines
18 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_cont_ArrayHandleMultiplexer_h
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#define vtk_m_cont_ArrayHandleMultiplexer_h
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#include <vtkm/Assert.h>
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#include <vtkm/TypeTraits.h>
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#include <vtkm/cont/ArrayHandle.h>
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#include <vtkm/cont/ArrayHandleCartesianProduct.h>
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#include <vtkm/cont/ArrayHandleCast.h>
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#include <vtkm/cont/ArrayHandleUniformPointCoordinates.h>
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#include <vtkm/cont/internal/Variant.h>
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#include <vtkm/exec/internal/Variant.h>
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namespace vtkm
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{
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namespace internal
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{
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namespace detail
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{
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struct ArrayPortalMultiplexerGetNumberOfValuesFunctor
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{
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template <typename PortalType>
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VTKM_EXEC_CONT vtkm::Id operator()(const PortalType& portal) const noexcept
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{
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return portal.GetNumberOfValues();
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}
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};
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struct ArrayPortalMultiplexerGetFunctor
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{
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VTKM_SUPPRESS_EXEC_WARNINGS
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template <typename PortalType>
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VTKM_EXEC_CONT typename PortalType::ValueType operator()(const PortalType& portal,
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vtkm::Id index) const noexcept
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{
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return portal.Get(index);
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}
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};
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struct ArrayPortalMultiplexerSetFunctor
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{
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template <typename PortalType>
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VTKM_EXEC_CONT void operator()(const PortalType& portal,
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vtkm::Id index,
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const typename PortalType::ValueType& value) const noexcept
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{
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this->DoSet(
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portal, index, value, typename vtkm::internal::PortalSupportsSets<PortalType>::type{});
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}
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private:
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VTKM_SUPPRESS_EXEC_WARNINGS
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template <typename PortalType>
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VTKM_EXEC_CONT void DoSet(const PortalType& portal,
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vtkm::Id index,
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const typename PortalType::ValueType& value,
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std::true_type) const noexcept
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{
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portal.Set(index, value);
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}
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VTKM_SUPPRESS_EXEC_WARNINGS
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template <typename PortalType>
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VTKM_EXEC_CONT void DoSet(const PortalType&,
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vtkm::Id,
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const typename PortalType::ValueType&,
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std::false_type) const noexcept
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{
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// This is an error but whatever.
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VTKM_ASSERT(false && "Calling Set on a portal that does not support it.");
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}
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};
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} // namespace detail
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template <typename... PortalTypes>
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struct ArrayPortalMultiplexer
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{
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using PortalVariantType = vtkm::exec::internal::Variant<PortalTypes...>;
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PortalVariantType PortalVariant;
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using ValueType = typename PortalVariantType::template TypeAt<0>::ValueType;
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ArrayPortalMultiplexer() = default;
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~ArrayPortalMultiplexer() = default;
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ArrayPortalMultiplexer(ArrayPortalMultiplexer&&) = default;
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ArrayPortalMultiplexer(const ArrayPortalMultiplexer&) = default;
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ArrayPortalMultiplexer& operator=(ArrayPortalMultiplexer&&) = default;
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ArrayPortalMultiplexer& operator=(const ArrayPortalMultiplexer&) = default;
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template <typename Portal>
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VTKM_EXEC_CONT ArrayPortalMultiplexer(const Portal& src) noexcept
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: PortalVariant(src)
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{
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}
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template <typename Portal>
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VTKM_EXEC_CONT ArrayPortalMultiplexer& operator=(const Portal& src) noexcept
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{
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this->PortalVariant = src;
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return *this;
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}
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VTKM_EXEC_CONT vtkm::Id GetNumberOfValues() const noexcept
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{
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return this->PortalVariant.CastAndCall(
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detail::ArrayPortalMultiplexerGetNumberOfValuesFunctor{});
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}
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VTKM_EXEC_CONT ValueType Get(vtkm::Id index) const noexcept
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{
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return this->PortalVariant.CastAndCall(detail::ArrayPortalMultiplexerGetFunctor{}, index);
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}
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VTKM_EXEC_CONT void Set(vtkm::Id index, const ValueType& value) const noexcept
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{
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this->PortalVariant.CastAndCall(detail::ArrayPortalMultiplexerSetFunctor{}, index, value);
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}
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};
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} // namespace internal
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namespace cont
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{
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template <typename... StorageTags>
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struct StorageTagMultiplexer
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{
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};
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namespace internal
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{
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namespace detail
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{
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struct MultiplexerGetNumberOfValuesFunctor
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{
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template <typename ArrayHandleType>
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VTKM_CONT vtkm::Id operator()(ArrayHandleType&& array) const
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{
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return array.GetNumberOfValues();
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}
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};
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struct MultiplexerAllocateFunctor
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{
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template <typename ArrayHandleType>
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VTKM_CONT void operator()(ArrayHandleType&& array, vtkm::Id numberOfValues) const
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{
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array.Allocate(numberOfValues);
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}
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};
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struct MultiplexerShrinkFunctor
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{
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template <typename ArrayHandleType>
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VTKM_CONT void operator()(ArrayHandleType&& array, vtkm::Id numberOfValues) const
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{
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array.Shrink(numberOfValues);
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}
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};
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struct MultiplexerReleaseResourcesFunctor
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{
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template <typename ArrayHandleType>
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VTKM_CONT void operator()(ArrayHandleType&& array) const
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{
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array.ReleaseResources();
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}
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};
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struct MultiplexerReleaseResourcesExecutionFunctor
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{
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template <typename ArrayHandleType>
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VTKM_CONT void operator()(ArrayHandleType&& array) const
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{
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array.ReleaseResourcesExecution();
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}
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};
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} // namespace detail
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template <typename ValueType_, typename... StorageTags>
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class Storage<ValueType_, StorageTagMultiplexer<StorageTags...>>
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{
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public:
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using ValueType = ValueType_;
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private:
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template <typename S>
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using StorageToArrayHandle = vtkm::cont::ArrayHandle<ValueType, S>;
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template <typename S>
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using StorageToPortalControl = typename StorageToArrayHandle<S>::WritePortalType;
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template <typename S>
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using StorageToPortalConstControl = typename StorageToArrayHandle<S>::ReadPortalType;
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using ArrayHandleVariantType =
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vtkm::cont::internal::Variant<StorageToArrayHandle<StorageTags>...>;
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ArrayHandleVariantType ArrayHandleVariant;
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public:
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using PortalType = vtkm::internal::ArrayPortalMultiplexer<StorageToPortalControl<StorageTags>...>;
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using PortalConstType =
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vtkm::internal::ArrayPortalMultiplexer<StorageToPortalConstControl<StorageTags>...>;
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Storage() = default;
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Storage(Storage&&) = default;
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Storage(const Storage&) = default;
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Storage& operator=(Storage&&) = default;
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Storage& operator=(const Storage&) = default;
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template <typename S>
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VTKM_CONT Storage(vtkm::cont::ArrayHandle<ValueType, S>&& rhs)
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: ArrayHandleVariant(std::move(rhs))
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{
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}
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template <typename S>
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VTKM_CONT Storage(const vtkm::cont::ArrayHandle<ValueType, S>& src)
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: ArrayHandleVariant(src)
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{
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}
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VTKM_CONT bool IsValid() const { return this->ArrayHandleVariant.IsValid(); }
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template <typename S>
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VTKM_CONT void SetArray(vtkm::cont::ArrayHandle<ValueType, S>&& rhs)
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{
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this->ArrayHandleVariant = std::move(rhs);
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}
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template <typename S>
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VTKM_CONT void SetArray(const vtkm::cont::ArrayHandle<ValueType, S>& src)
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{
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this->ArrayHandleVariant = src;
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}
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private:
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struct GetPortalFunctor
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{
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template <typename ArrayHandleType>
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VTKM_CONT PortalType operator()(ArrayHandleType&& array) const
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{
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return PortalType(array.WritePortal());
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}
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};
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struct GetPortalConstFunctor
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{
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template <typename ArrayHandleType>
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VTKM_CONT PortalConstType operator()(ArrayHandleType&& array) const
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{
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return PortalConstType(array.ReadPortal());
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}
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};
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public:
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VTKM_CONT PortalType GetPortal()
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{
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return this->ArrayHandleVariant.CastAndCall(GetPortalFunctor{});
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}
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VTKM_CONT PortalConstType GetPortalConst() const
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{
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return this->ArrayHandleVariant.CastAndCall(GetPortalConstFunctor{});
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}
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VTKM_CONT vtkm::Id GetNumberOfValues() const
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{
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if (this->IsValid())
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{
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return this->ArrayHandleVariant.CastAndCall(detail::MultiplexerGetNumberOfValuesFunctor{});
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}
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else
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{
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return 0;
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}
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}
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VTKM_CONT void Allocate(vtkm::Id numberOfValues)
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{
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if (this->IsValid())
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{
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this->ArrayHandleVariant.CastAndCall(detail::MultiplexerAllocateFunctor{}, numberOfValues);
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}
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else if (numberOfValues > 0)
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{
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throw vtkm::cont::ErrorBadValue(
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"Attempted to allocate an ArrayHandleMultiplexer with no underlying array.");
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}
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else
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{
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// Special case, OK to perform "0" allocation on invalid array.
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}
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}
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VTKM_CONT void Shrink(vtkm::Id numberOfValues)
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{
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if (this->IsValid())
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{
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this->ArrayHandleVariant.CastAndCall(detail::MultiplexerShrinkFunctor{}, numberOfValues);
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}
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else if (numberOfValues > 0)
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{
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throw vtkm::cont::ErrorBadValue(
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"Attempted to allocate an ArrayHandleMultiplexer with no underlying array.");
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}
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else
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{
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// Special case, OK to perform "0" allocation on invalid array.
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}
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}
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VTKM_CONT void ReleaseResources()
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{
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if (this->IsValid())
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{
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this->ArrayHandleVariant.CastAndCall(detail::MultiplexerReleaseResourcesFunctor{});
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}
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}
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VTKM_CONT ArrayHandleVariantType& GetArrayHandleVariant() { return this->ArrayHandleVariant; }
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VTKM_CONT const ArrayHandleVariantType& GetArrayHandleVariant() const
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{
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return this->ArrayHandleVariant;
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}
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};
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template <typename ValueType_, typename... StorageTags, typename Device>
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class ArrayTransfer<ValueType_, StorageTagMultiplexer<StorageTags...>, Device>
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{
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public:
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using ValueType = ValueType_;
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private:
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using StorageTag = StorageTagMultiplexer<StorageTags...>;
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using StorageType = vtkm::cont::internal::Storage<ValueType, StorageTag>;
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template <typename S>
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using StorageToArrayHandle = vtkm::cont::ArrayHandle<ValueType, S>;
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template <typename S>
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using StorageToPortalExecution =
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typename StorageToArrayHandle<S>::template ExecutionTypes<Device>::Portal;
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template <typename S>
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using StorageToPortalConstExecution =
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typename StorageToArrayHandle<S>::template ExecutionTypes<Device>::PortalConst;
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public:
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using PortalControl = typename StorageType::PortalType;
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using PortalConstControl = typename StorageType::PortalConstType;
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using PortalExecution =
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vtkm::internal::ArrayPortalMultiplexer<StorageToPortalExecution<StorageTags>...>;
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using PortalConstExecution =
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vtkm::internal::ArrayPortalMultiplexer<StorageToPortalConstExecution<StorageTags>...>;
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private:
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StorageType* StoragePointer;
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public:
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VTKM_CONT ArrayTransfer(StorageType* storage)
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: StoragePointer(storage)
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{
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}
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VTKM_CONT vtkm::Id GetNumberOfValues() const { return this->StoragePointer->GetNumberOfValues(); }
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VTKM_CONT PortalConstExecution PrepareForInput(bool vtkmNotUsed(updateData),
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vtkm::cont::Token& token)
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{
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return this->StoragePointer->GetArrayHandleVariant().CastAndCall(PrepareForInputFunctor{},
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token);
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}
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VTKM_CONT PortalExecution PrepareForInPlace(bool vtkmNotUsed(updateData),
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vtkm::cont::Token& token)
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{
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return this->StoragePointer->GetArrayHandleVariant().CastAndCall(PrepareForInPlaceFunctor{},
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token);
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}
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VTKM_CONT PortalExecution PrepareForOutput(vtkm::Id numberOfValues, vtkm::cont::Token& token)
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{
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return this->StoragePointer->GetArrayHandleVariant().CastAndCall(
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PrepareForOutputFunctor{}, numberOfValues, token);
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}
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VTKM_CONT void RetrieveOutputData(StorageType* vtkmNotUsed(storage)) const
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{
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// Implementation of this method should be unnecessary. The internal
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// array handles should automatically retrieve the output data as
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// necessary.
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}
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VTKM_CONT void Shrink(vtkm::Id numberOfValues)
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{
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this->StoragePointer->GetArrayHandleVariant().CastAndCall(detail::MultiplexerShrinkFunctor{},
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numberOfValues);
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}
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VTKM_CONT void ReleaseResources()
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{
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this->StoragePointer->GetArrayHandleVariant().CastAndCall(
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detail::MultiplexerReleaseResourcesExecutionFunctor{});
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}
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private:
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struct PrepareForInputFunctor
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{
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template <typename ArrayHandleType>
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VTKM_CONT PortalConstExecution operator()(const ArrayHandleType& array,
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vtkm::cont::Token& token)
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{
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return PortalConstExecution(array.PrepareForInput(Device{}, token));
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}
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};
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struct PrepareForInPlaceFunctor
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{
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template <typename ArrayHandleType>
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VTKM_CONT PortalExecution operator()(ArrayHandleType& array, vtkm::cont::Token& token)
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{
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return PortalExecution(array.PrepareForInPlace(Device{}, token));
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}
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};
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struct PrepareForOutputFunctor
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{
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template <typename ArrayHandleType>
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VTKM_CONT PortalExecution operator()(ArrayHandleType& array,
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vtkm::Id numberOfValues,
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vtkm::cont::Token& token)
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{
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return PortalExecution(array.PrepareForOutput(numberOfValues, Device{}, token));
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}
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};
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};
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} // namespace internal
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namespace detail
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{
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template <typename... ArrayHandleTypes>
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struct ArrayHandleMultiplexerTraits
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{
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using ArrayHandleType0 =
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brigand::at<brigand::list<ArrayHandleTypes...>, std::integral_constant<vtkm::IdComponent, 0>>;
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VTKM_IS_ARRAY_HANDLE(ArrayHandleType0);
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using ValueType = typename ArrayHandleType0::ValueType;
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// If there is a compile error in this group of lines, then one of the array types given to
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// ArrayHandleMultiplexer must contain an invalid ArrayHandle. That could mean that it is not an
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// ArrayHandle type or it could mean that the value type does not match the appropriate value
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// type.
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template <typename ArrayHandle>
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struct CheckArrayHandleTransform
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{
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VTKM_IS_ARRAY_HANDLE(ArrayHandle);
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VTKM_STATIC_ASSERT((std::is_same<ValueType, typename ArrayHandle::ValueType>::value));
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};
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using CheckArrayHandle = brigand::list<CheckArrayHandleTransform<ArrayHandleTypes>...>;
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// Note that this group of code could be simplified as the pair of lines:
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// template <typename ArrayHandle>
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// using ArrayHandleToStorageTag = typename ArrayHandle::StorageTag;
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// However, there are issues with older Visual Studio compilers that is not working
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// correctly with that form.
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template <typename ArrayHandle>
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struct ArrayHandleToStorageTagImpl
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{
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using Type = typename ArrayHandle::StorageTag;
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};
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template <typename ArrayHandle>
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using ArrayHandleToStorageTag = typename ArrayHandleToStorageTagImpl<ArrayHandle>::Type;
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using StorageTag =
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vtkm::cont::StorageTagMultiplexer<ArrayHandleToStorageTag<ArrayHandleTypes>...>;
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using StorageType = vtkm::cont::internal::Storage<ValueType, StorageTag>;
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};
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}
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/// \brief An ArrayHandle that can behave like several other handles.
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///
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/// An \c ArrayHandleMultiplexer simply redirects its calls to another \c ArrayHandle. However
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/// the type of that \c ArrayHandle does not need to be (completely) known at runtime. Rather,
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/// \c ArrayHandleMultiplexer is defined over a set of possible \c ArrayHandle types. Any
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/// one of these \c ArrayHandles may be assigned to the \c ArrayHandleMultiplexer.
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///
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/// When a value is retreived from the \c ArrayHandleMultiplexer, the multiplexer checks to
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/// see which type of array is currently stored in it. It then redirects to the \c ArrayHandle
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/// of the appropriate type.
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///
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/// The \c ArrayHandleMultiplexer template parameters are all the ArrayHandle types it
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/// should support.
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///
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/// If only one template parameter is given, it is assumed to be the \c ValueType of the
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/// array. A default list of supported arrays is supported (see
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/// \c vtkm::cont::internal::ArrayHandleMultiplexerDefaultArrays.) If multiple template
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/// parameters are given, they are all considered possible \c ArrayHandle types.
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///
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template <typename... ArrayHandleTypes>
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class ArrayHandleMultiplexer
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: public vtkm::cont::ArrayHandle<
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typename detail::ArrayHandleMultiplexerTraits<ArrayHandleTypes...>::ValueType,
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typename detail::ArrayHandleMultiplexerTraits<ArrayHandleTypes...>::StorageTag>
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{
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using Traits = detail::ArrayHandleMultiplexerTraits<ArrayHandleTypes...>;
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public:
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VTKM_ARRAY_HANDLE_SUBCLASS(
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ArrayHandleMultiplexer,
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(ArrayHandleMultiplexer<ArrayHandleTypes...>),
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(vtkm::cont::ArrayHandle<typename Traits::ValueType, typename Traits::StorageTag>));
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private:
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using StorageType = vtkm::cont::internal::Storage<ValueType, StorageTag>;
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public:
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template <typename RealStorageTag>
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VTKM_CONT ArrayHandleMultiplexer(const vtkm::cont::ArrayHandle<ValueType, RealStorageTag>& src)
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: Superclass(StorageType(src))
|
|
{
|
|
}
|
|
|
|
template <typename RealStorageTag>
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|
VTKM_CONT ArrayHandleMultiplexer(vtkm::cont::ArrayHandle<ValueType, RealStorageTag>&& rhs)
|
|
: Superclass(StorageType(std::move(rhs)))
|
|
{
|
|
}
|
|
|
|
VTKM_CONT bool IsValid() const { return this->GetStorage().IsValid(); }
|
|
|
|
template <typename S>
|
|
VTKM_CONT void SetArray(vtkm::cont::ArrayHandle<ValueType, S>&& rhs)
|
|
{
|
|
this->GetStorage().SetArray(std::move(rhs));
|
|
}
|
|
|
|
template <typename S>
|
|
VTKM_CONT void SetArray(const vtkm::cont::ArrayHandle<ValueType, S>& src)
|
|
{
|
|
this->GetStorage().SetArray(src);
|
|
}
|
|
};
|
|
|
|
/// \brief Converts a \c vtkm::ListTag to an \c ArrayHandleMultiplexer
|
|
///
|
|
/// The argument of this template must be a vtkm::ListTag and furthermore all the types in
|
|
/// the list tag must be some type of \c ArrayHandle. The templated type gets aliased to
|
|
/// an \c ArrayHandleMultiplexer that can store any of these ArrayHandle types.
|
|
///
|
|
/// Deprecated. Use `ArrayHandleMultiplexerFromList` instead.
|
|
///
|
|
template <typename ListTag>
|
|
using ArrayHandleMultiplexerFromListTag VTKM_DEPRECATED(
|
|
1.6,
|
|
"vtkm::ListTag is no longer supported. Use vtkm::List instead.") =
|
|
vtkm::ListApply<ListTag, ArrayHandleMultiplexer>;
|
|
|
|
/// \brief Converts a`vtkm::List` to an `ArrayHandleMultiplexer`
|
|
///
|
|
/// The argument of this template must be a `vtkm::List` and furthermore all the types in
|
|
/// the list tag must be some type of \c ArrayHandle. The templated type gets aliased to
|
|
/// an \c ArrayHandleMultiplexer that can store any of these ArrayHandle types.
|
|
///
|
|
template <typename List>
|
|
using ArrayHandleMultiplexerFromList = vtkm::ListApply<List, ArrayHandleMultiplexer>;
|
|
|
|
} // namespace cont
|
|
|
|
} // namespace vtkm
|
|
|
|
#endif //vtk_m_cont_ArrayHandleMultiplexer_h
|