mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-19 02:25:42 +00:00
554bc3d369
Instead of always using the first enabled device, now TryExecute can be told which device at runtime to use.
107 lines
4.0 KiB
C++
107 lines
4.0 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 2017 National Technology & Engineering Solutions of Sandia, LLC (NTESS).
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// Copyright 2017 UT-Battelle, LLC.
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// Copyright 2017 Los Alamos National Security.
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//
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// Under the terms of Contract DE-NA0003525 with NTESS,
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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_ArrayCopy_h
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#define vtk_m_cont_ArrayCopy_h
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#include <vtkm/cont/ArrayHandle.h>
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#include <vtkm/cont/ArrayHandleCast.h>
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#include <vtkm/cont/DeviceAdapterAlgorithm.h>
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#include <vtkm/cont/RuntimeDeviceTracker.h>
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#include <vtkm/cont/TryExecute.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 version of the method takes a device adapter on which to perform the copy. If you do not
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/// have a device adapter handy, use a version of \c ArrayCopy that uses a \c RuntimeDeviceTracker
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/// (or no device at all) to choose a good option for you.
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///
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template <typename InValueType,
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typename InStorage,
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typename OutValueType,
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typename OutStorage,
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typename Device>
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VTKM_CONT void ArrayCopy(const vtkm::cont::ArrayHandle<InValueType, InStorage>& source,
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vtkm::cont::ArrayHandle<OutValueType, OutStorage>& destination,
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Device)
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{
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vtkm::cont::DeviceAdapterAlgorithm<Device>::Copy(
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vtkm::cont::make_ArrayHandleCast<OutValueType>(source), destination);
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}
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namespace detail
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{
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struct ArrayCopyFunctor
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{
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template <typename Device, typename InArray, typename OutArray>
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VTKM_CONT bool operator()(Device, const InArray& input, OutArray& output)
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{
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VTKM_IS_DEVICE_ADAPTER_TAG(Device);
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vtkm::cont::ArrayCopy(input, output, Device());
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return true;
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}
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};
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} // namespace detail
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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 optionally takes a \c RuntimeDeviceTracker to control which devices to try.
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///
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template <typename InValueType, typename InStorage, typename OutValueType, typename OutStorage>
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VTKM_CONT void ArrayCopy(
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const vtkm::cont::ArrayHandle<InValueType, InStorage>& source,
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vtkm::cont::ArrayHandle<OutValueType, OutStorage>& destination,
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vtkm::cont::RuntimeDeviceTracker tracker = vtkm::cont::GetGlobalRuntimeDeviceTracker())
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{
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detail::ArrayCopyFunctor functor;
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// First pass, only use source's already loaded device.
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bool isCopied = vtkm::cont::TryExecuteOnDevice(
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source.GetDeviceAdapterId(), functor, tracker, source, destination);
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if (!isCopied)
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{ // Second pass, use any available device.
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isCopied = vtkm::cont::TryExecute(functor, tracker, source, destination);
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}
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if (!isCopied)
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{ // If after the second pass, still not valid through an exception
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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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