mirror of
https://gitlab.kitware.com/vtk/vtk-m
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70 lines
2.7 KiB
C++
70 lines
2.7 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_ArrayCopy_h
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#define vtk_m_cont_ArrayCopy_h
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#include <vtkm/cont/Algorithm.h>
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#include <vtkm/cont/ArrayHandle.h>
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#include <vtkm/cont/DeviceAdapterTag.h>
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#include <vtkm/cont/ErrorExecution.h>
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#include <vtkm/cont/Logging.h>
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// TODO: When virtual arrays are available, compile the implementation in a .cxx/.cu file. Common
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// arrays are copied directly but anything else would be copied through virtual methods.
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namespace vtkm
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{
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namespace cont
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{
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/// \brief Does a deep copy from one array to another array.
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///
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/// Given a source \c ArrayHandle and a destination \c ArrayHandle, this function allocates the
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/// destination \c ArrayHandle to the correct size and deeply copies all the values from the source
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/// to the destination.
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///
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/// This method will attempt to copy the data using the device that the input
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/// data is already valid on. If the input data is only valid in the control
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/// environment, the runtime device tracker is used to try to find another
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/// device.
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///
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template <typename InValueType, typename InStorage, typename OutValueType, typename OutStorage>
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VTKM_CONT inline void ArrayCopy(const vtkm::cont::ArrayHandle<InValueType, InStorage>& source,
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vtkm::cont::ArrayHandle<OutValueType, OutStorage>& destination)
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{
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// Find the device that already has a copy of the data:
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vtkm::cont::DeviceAdapterId devId = source.GetDeviceAdapterId();
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// If the data is not on any device, let the runtime tracker pick an available
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// parallel copy algorithm.
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if (devId.GetValue() == VTKM_DEVICE_ADAPTER_UNDEFINED)
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{
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devId = vtkm::cont::make_DeviceAdapterId(VTKM_DEVICE_ADAPTER_ANY);
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}
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bool success = vtkm::cont::Algorithm::Copy(devId, source, destination);
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if (!success && devId.GetValue() != VTKM_DEVICE_ADAPTER_ANY)
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{ // Retry on any device if the first attempt failed.
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VTKM_LOG_S(vtkm::cont::LogLevel::Error,
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"Failed to run ArrayCopy on device '" << devId.GetName()
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<< "'. Retrying on any device.");
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success = vtkm::cont::Algorithm::Copy(vtkm::cont::DeviceAdapterTagAny{}, source, destination);
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}
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if (!success)
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{
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throw vtkm::cont::ErrorExecution("Failed to run ArrayCopy on any device.");
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}
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}
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}
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} // namespace vtkm::cont
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#endif //vtk_m_cont_ArrayCopy_h
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