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https://gitlab.kitware.com/vtk/vtk-m
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d1160638b7
`vtkm::cont::UnknownArrayHandle` now provides a set of method that allows you to copy data from one `UnknownArrayHandle` to another. The first method, `DeepCopyFrom`, takes a source `UnknownArrayHandle` and deep copies the data to the called one. If the `UnknownArrayHandle` already points to a real `ArrayHandle`, the data is copied into that `ArrayHandle`. If the `UnknownArrayHandle` does not point to an existing `ArrayHandle`, then a new `ArrayHandleBasic` with the same value type as the source is created and copied into. The second method, `CopyShallowIfPossibleFrom` behaves similarly to `DeepCopyFrom` except that it will perform a shallow copy if possible. That is, if the target `UnknownArrayHandle` points to an `ArrayHandle` of the same type as the source `UnknownArrayHandle`, then a shallow copy occurs and the underlying `ArrayHandle` will point to the source. If the types differ, then a deep copy is performed. If the target `UnknownArrayHandle` does not point to an `ArrayHandle`, then the behavior is the same as the `=` operator. One of the intentions of these new methods is to allow you to copy arrays without using a device compiler (e.g. `nvcc`). Calling `ArrayCopy` requires you to include the `ArrayCopy.h` header file, and that in turn requires device adapter algorithms. These methods insulate you from these.
39 lines
1.3 KiB
C++
39 lines
1.3 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_cont_internal_ArrayCopyUnknown_h
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#define vtk_m_cont_internal_ArrayCopyUnknown_h
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#include <vtkm/cont/UnknownArrayHandle.h>
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#include <vtkm/cont/vtkm_cont_export.h>
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namespace vtkm
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{
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namespace cont
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{
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namespace internal
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{
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/// Same as `ArrayCopy` with `UnknownArrayHandle` except that it can be used without
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/// using a device compiler.
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///
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VTKM_CONT_EXPORT void ArrayCopyUnknown(const vtkm::cont::UnknownArrayHandle& source,
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vtkm::cont::UnknownArrayHandle& destination);
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VTKM_CONT_EXPORT void ArrayCopyUnknown(const vtkm::cont::UnknownArrayHandle& source,
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const vtkm::cont::UnknownArrayHandle& destination);
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} // namespace vtkm::cont::internal
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} // namespace vtkm::cont
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} // namespace vtkm
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#endif //vtk_m_cont_internal_ArrayCopyUnknown_h
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