mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-19 18:45:43 +00:00
fec9262099
The DynamicArrayHandle and DynamicCellSet classes exclusively work in the control environment. However, CUDA likes to add __device__ to constructors, destructors, and assignment operators it automatically adds. This in turn causes warnings about the __device__ function using host-only classes (like boost::shared_ptr). Solve this problem by adding explicit methods for all of these.
453 lines
16 KiB
C++
453 lines
16 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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// 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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// Copyright 2014 Sandia Corporation.
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// Copyright 2014 UT-Battelle, LLC.
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// Copyright 2014 Los Alamos National Security.
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//
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// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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// the U.S. Government retains certain rights in this software.
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//
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// Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
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// Laboratory (LANL), the U.S. Government retains certain rights in
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// this software.
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//============================================================================
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#ifndef vtk_m_cont_DynamicArrayHandle_h
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#define vtk_m_cont_DynamicArrayHandle_h
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#include <vtkm/TypeListTag.h>
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#include <vtkm/VecTraits.h>
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#include <vtkm/cont/ArrayHandle.h>
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#include <vtkm/cont/ErrorControlBadValue.h>
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#include <vtkm/cont/StorageListTag.h>
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#include <vtkm/cont/internal/DynamicTransform.h>
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VTKM_THIRDPARTY_PRE_INCLUDE
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#include <boost/smart_ptr/shared_ptr.hpp>
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#include <boost/utility/enable_if.hpp>
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VTKM_THIRDPARTY_POST_INCLUDE
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namespace vtkm {
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namespace cont {
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// Forward declaration
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template<typename TypeList, typename StorageList>
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class DynamicArrayHandleBase;
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namespace detail {
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/// \brief Base class for PolymorphicArrayHandleContainer
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///
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struct PolymorphicArrayHandleContainerBase
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{
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// This must exist so that subclasses are destroyed correctly.
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virtual ~PolymorphicArrayHandleContainerBase() { }
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virtual vtkm::IdComponent GetNumberOfComponents() const = 0;
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virtual vtkm::Id GetNumberOfValues() const = 0;
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virtual void PrintSummary(std::ostream &out) const = 0;
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virtual boost::shared_ptr<PolymorphicArrayHandleContainerBase>
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NewInstance() const = 0;
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};
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/// \brief ArrayHandle container that can use C++ run-time type information.
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///
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/// The \c PolymorphicArrayHandleContainer is similar to the
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/// \c SimplePolymorphicContainer in that it can contain an object of an
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/// unkown type. However, this class specifically holds ArrayHandle objects
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/// (with different template parameters) so that it can polymorphically answer
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/// simple questions about the object.
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///
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template<typename T, typename Storage>
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struct PolymorphicArrayHandleContainer
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: public PolymorphicArrayHandleContainerBase
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{
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typedef vtkm::cont::ArrayHandle<T, Storage> ArrayHandleType;
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ArrayHandleType Array;
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VTKM_CONT_EXPORT
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PolymorphicArrayHandleContainer() : Array() { }
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VTKM_CONT_EXPORT
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PolymorphicArrayHandleContainer(const ArrayHandleType &array)
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: Array(array) { }
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virtual vtkm::IdComponent GetNumberOfComponents() const
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{
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return vtkm::VecTraits<T>::NUM_COMPONENTS;
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}
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virtual vtkm::Id GetNumberOfValues() const
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{
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return this->Array.GetNumberOfValues();
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}
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virtual void PrintSummary(std::ostream &out) const
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{
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vtkm::cont::printSummary_ArrayHandle(this->Array, out);
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}
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virtual boost::shared_ptr<PolymorphicArrayHandleContainerBase>
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NewInstance() const
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{
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return boost::shared_ptr<PolymorphicArrayHandleContainerBase>(
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new PolymorphicArrayHandleContainer<T,Storage>());
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}
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};
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// One instance of a template class cannot access the private members of
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// another instance of a template class. However, I want to be able to copy
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// construct a DynamicArrayHandle from another DynamicArrayHandle of any other
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// type. Since you cannot partially specialize friendship, use this accessor
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// class to get at the internals for the copy constructor.
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struct DynamicArrayHandleCopyHelper {
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template<typename TypeList, typename StorageList>
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VTKM_CONT_EXPORT
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static
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boost::shared_ptr<vtkm::cont::detail::PolymorphicArrayHandleContainerBase>
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GetArrayHandleContainer(const vtkm::cont::DynamicArrayHandleBase<TypeList,StorageList> &src)
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{
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return src.ArrayContainer;
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}
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};
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} // namespace detail
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/// \brief Holds an array handle without having to specify template parameters.
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///
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/// \c DynamicArrayHandle holds an \c ArrayHandle object using runtime
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/// polymorphism to manage different value types and storage rather than
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/// compile-time templates. This adds a programming convenience that helps
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/// avoid a proliferation of templates. It also provides the management
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/// necessary to interface VTK-m with data sources where types will not be
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/// known until runtime.
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///
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/// To interface between the runtime polymorphism and the templated algorithms
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/// in VTK-m, \c DynamicArrayHandle contains a method named \c CastAndCall that
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/// will determine the correct type from some known list of types and storage
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/// objects. This mechanism is used internally by VTK-m's worklet invocation
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/// mechanism to determine the type when running algorithms.
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///
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/// By default, \c DynamicArrayHandle will assume that the value type in the
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/// array matches one of the types specified by \c VTKM_DEFAULT_TYPE_LIST_TAG
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/// and the storage matches one of the tags specified by \c
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/// VTKM_DEFAULT_STORAGE_LIST_TAG. These lists can be changed by using the \c
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/// ResetTypeList and \c ResetStorageList methods, respectively. It is
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/// worthwhile to match these lists closely to the possible types that might be
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/// used. If a type is missing you will get a runtime error. If there are more
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/// types than necessary, then the template mechanism will create a lot of
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/// object code that is never used, and keep in mind that the number of
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/// combinations grows exponentially when using multiple \c DynamicArrayHandle
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/// objects.
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///
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/// The actual implementation of \c DynamicArrayHandle is in a templated class
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/// named \c DynamicArrayHandleBase, which is templated on the list of
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/// component types and storage types. \c DynamicArrayHandle is really just a
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/// typedef of \c DynamicArrayHandleBase with the default type and storage
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/// lists.
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///
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template<typename TypeList, typename StorageList>
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class DynamicArrayHandleBase
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{
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public:
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VTKM_CONT_EXPORT
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DynamicArrayHandleBase() { }
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template<typename Type, typename Storage>
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VTKM_CONT_EXPORT
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DynamicArrayHandleBase(const vtkm::cont::ArrayHandle<Type,Storage> &array)
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: ArrayContainer(new vtkm::cont::detail::PolymorphicArrayHandleContainer<
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Type,Storage>(array))
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{ }
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VTKM_CONT_EXPORT
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DynamicArrayHandleBase(
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const DynamicArrayHandleBase<TypeList,StorageList> &src)
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: ArrayContainer(src.ArrayContainer) { }
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template<typename OtherTypeList, typename OtherStorageList>
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VTKM_CONT_EXPORT
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explicit DynamicArrayHandleBase(
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const DynamicArrayHandleBase<OtherTypeList,OtherStorageList> &src)
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: ArrayContainer(
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detail::DynamicArrayHandleCopyHelper::GetArrayHandleContainer(src))
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{ }
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VTKM_CONT_EXPORT
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~DynamicArrayHandleBase() { }
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VTKM_CONT_EXPORT
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vtkm::cont::DynamicArrayHandleBase<TypeList,StorageList> &
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operator=(const vtkm::cont::DynamicArrayHandleBase<TypeList,StorageList> &src)
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{
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this->ArrayContainer = src.ArrayContainer;
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return *this;
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}
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/// Returns true if this array is of the provided type and uses the provided
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/// storage.
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///
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template<typename Type, typename Storage>
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VTKM_CONT_EXPORT
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bool IsTypeAndStorage(Type = Type(), Storage = Storage()) const {
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return (this->TryCastContainer<Type,Storage>() != NULL);
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}
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/// Returns true if this array matches the array handle type passed in.
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///
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template<typename ArrayHandleType>
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VTKM_CONT_EXPORT
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bool IsArrayHandleType(const ArrayHandleType &vtkmNotUsed(array))
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{
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VTKM_IS_ARRAY_HANDLE(ArrayHandleType);
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typedef typename ArrayHandleType::ValueType ValueType;
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typedef typename ArrayHandleType::StorageTag StorageTag;
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return this->IsTypeAndStorage(ValueType(), StorageTag());
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}
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/// Returns this array cast to an ArrayHandle object of the given type and
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/// storage. Throws \c ErrorControlBadValue if the cast does not work. Use
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/// \c IsTypeAndStorage to check if the cast can happen.
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///
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template<typename Type, typename Storage>
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VTKM_CONT_EXPORT
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vtkm::cont::ArrayHandle<Type, Storage>
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CastToArrayHandle(Type = Type(), Storage = Storage()) const {
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vtkm::cont::detail::PolymorphicArrayHandleContainer<Type,Storage> *container
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= this->TryCastContainer<Type,Storage>();
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if (container == NULL)
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{
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throw vtkm::cont::ErrorControlBadValue("Bad cast of dynamic array.");
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}
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return container->Array;
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}
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/// Given a refernce to an ArrayHandle object, casts this array to the
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/// ArrayHandle's type and sets the given ArrayHandle to this array. Throws
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/// \c ErrorControlBadValue if the cast does not work. Use \c
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/// IsTypeAndStorage to check if the cast can happen.
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///
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template<typename ArrayHandleType>
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VTKM_CONT_EXPORT
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void CastToArrayHandle(ArrayHandleType &array) const {
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VTKM_IS_ARRAY_HANDLE(ArrayHandleType);
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typedef typename ArrayHandleType::ValueType ValueType;
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typedef typename ArrayHandleType::StorageTag StorageTag;
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array = this->CastToArrayHandle(ValueType(), StorageTag());
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}
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/// Changes the types to try casting to when resolving this dynamic array,
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/// which is specified with a list tag like those in TypeListTag.h. Since C++
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/// does not allow you to actually change the template arguments, this method
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/// returns a new dynamic array object. This method is particularly useful to
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/// narrow down (or expand) the types when using an array of particular
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/// constraints.
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///
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template<typename NewTypeList>
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VTKM_CONT_EXPORT
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DynamicArrayHandleBase<NewTypeList,StorageList>
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ResetTypeList(NewTypeList = NewTypeList()) const {
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VTKM_IS_LIST_TAG(NewTypeList);
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return DynamicArrayHandleBase<NewTypeList,StorageList>(*this);
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}
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/// Changes the array storage types to try casting to when resolving this
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/// dynamic array, which is specified with a list tag like those in
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/// StorageListTag.h. Since C++ does not allow you to actually change the
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/// template arguments, this method returns a new dynamic array object. This
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/// method is particularly useful to narrow down (or expand) the types when
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/// using an array of particular constraints.
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///
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template<typename NewStorageList>
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VTKM_CONT_EXPORT
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DynamicArrayHandleBase<TypeList,NewStorageList>
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ResetStorageList(NewStorageList = NewStorageList()) const {
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VTKM_IS_LIST_TAG(NewStorageList);
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return DynamicArrayHandleBase<TypeList,NewStorageList>(*this);
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}
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/// Attempts to cast the held array to a specific value type and storage,
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/// then call the given functor with the cast array. The types and storage
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/// tried in the cast are those in the lists defined by the TypeList and
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/// StorageList, respectively. The default \c DynamicArrayHandle sets these
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/// two lists to VTKM_DEFAULT_TYPE_LIST_TAG and VTK_DEFAULT_STORAGE_LIST_TAG,
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/// respectively.
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///
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template<typename Functor>
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VTKM_CONT_EXPORT
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void CastAndCall(const Functor &f) const;
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/// \brief Create a new array of the same type as this array.
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///
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/// This method creates a new array that is the same type as this one and
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/// returns a new dynamic array handle for it. This method is convenient when
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/// creating output arrays that should be the same type as some input array.
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///
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VTKM_CONT_EXPORT
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DynamicArrayHandleBase<TypeList,StorageList> NewInstance() const
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{
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DynamicArrayHandleBase<TypeList,StorageList> newArray;
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newArray.ArrayContainer = this->ArrayContainer->NewInstance();
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return newArray;
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}
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/// \brief Get the number of components in each array value.
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///
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/// This method will query the array type for the number of components in
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/// each value of the array. The number of components is determined by
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/// the \c VecTraits::NUM_COMPONENTS trait class.
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///
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VTKM_CONT_EXPORT
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vtkm::IdComponent GetNumberOfComponents() const
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{
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return this->ArrayContainer->GetNumberOfComponents();
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}
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/// \brief Get the number of values in the array.
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///
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VTKM_CONT_EXPORT
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vtkm::Id GetNumberOfValues() const
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{
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return this->ArrayContainer->GetNumberOfValues();
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}
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VTKM_CONT_EXPORT
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virtual void PrintSummary(std::ostream &out) const
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{
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this->ArrayContainer->PrintSummary(out);
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}
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private:
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boost::shared_ptr<vtkm::cont::detail::PolymorphicArrayHandleContainerBase>
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ArrayContainer;
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friend struct detail::DynamicArrayHandleCopyHelper;
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template<typename Type, typename Storage>
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VTKM_CONT_EXPORT
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vtkm::cont::detail::PolymorphicArrayHandleContainer<Type,Storage> *
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TryCastContainer() const {
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return
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dynamic_cast<
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vtkm::cont::detail::PolymorphicArrayHandleContainer<Type,Storage> *>(
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this->ArrayContainer.get());
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}
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};
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typedef vtkm::cont::DynamicArrayHandleBase<
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VTKM_DEFAULT_TYPE_LIST_TAG, VTKM_DEFAULT_STORAGE_LIST_TAG>
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DynamicArrayHandle;
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namespace detail {
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template<typename Functor, typename Type>
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struct DynamicArrayHandleTryStorage {
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const DynamicArrayHandle Array;
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const Functor &Function;
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bool FoundCast;
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VTKM_CONT_EXPORT
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DynamicArrayHandleTryStorage(const DynamicArrayHandle &array,
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const Functor &f)
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: Array(array), Function(f), FoundCast(false) { }
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template<typename Storage>
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VTKM_CONT_EXPORT
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void operator()(Storage) {
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this->DoCast(Storage(),
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typename vtkm::cont::internal::IsValidArrayHandle<Type,Storage>::type());
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}
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private:
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template<typename Storage>
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void DoCast(Storage, boost::mpl::bool_<true>)
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{
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if (!this->FoundCast &&
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this->Array.IsTypeAndStorage(Type(), Storage()))
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{
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this->Function(this->Array.CastToArrayHandle(Type(), Storage()));
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this->FoundCast = true;
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}
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}
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template<typename Storage>
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void DoCast(Storage, boost::mpl::bool_<false>)
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{
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// This type of array handle cannot exist, so do nothing.
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}
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};
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template<typename Functor, typename StorageList>
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struct DynamicArrayHandleTryType {
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const DynamicArrayHandle Array;
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const Functor &Function;
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bool FoundCast;
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VTKM_CONT_EXPORT
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DynamicArrayHandleTryType(const DynamicArrayHandle &array, const Functor &f)
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: Array(array), Function(f), FoundCast(false) { }
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template<typename Type>
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VTKM_CONT_EXPORT
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void operator()(Type) {
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if (this->FoundCast) { return; }
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typedef DynamicArrayHandleTryStorage<Functor, Type> TryStorageType;
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TryStorageType tryStorage =
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TryStorageType(this->Array, this->Function);
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vtkm::ListForEach(tryStorage, StorageList());
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if (tryStorage.FoundCast)
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{
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this->FoundCast = true;
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}
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}
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};
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} // namespace detail
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template<typename TypeList, typename StorageList>
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template<typename Functor>
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VTKM_CONT_EXPORT
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void DynamicArrayHandleBase<TypeList,StorageList>::
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CastAndCall(const Functor &f) const
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{
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VTKM_IS_LIST_TAG(TypeList);
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VTKM_IS_LIST_TAG(StorageList);
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typedef detail::DynamicArrayHandleTryType<Functor, StorageList> TryTypeType;
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// We cast this to a DynamicArrayHandle because at this point we are ignoring
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// the type/storage lists in it. There is no sense in adding more unnecessary
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// template cases.
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TryTypeType tryType = TryTypeType(DynamicArrayHandle(*this), f);
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vtkm::ListForEach(tryType, TypeList());
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if (!tryType.FoundCast)
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{
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throw vtkm::cont::ErrorControlBadValue(
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"Could not find appropriate cast for array in CastAndCall.");
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}
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}
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namespace internal {
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template<typename TypeList, typename StorageList>
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struct DynamicTransformTraits<
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vtkm::cont::DynamicArrayHandleBase<TypeList,StorageList> >
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{
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typedef vtkm::cont::internal::DynamicTransformTagCastAndCall DynamicTag;
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};
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} // namespace internal
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}
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} // namespace vtkm::cont
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#endif //vtk_m_cont_DynamicArrayHandle_h
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