22ea58335a
This was removed as CUDA 9.0 on MSVC has issues where CUB/Thrust would fail to compile when given these types.
263 lines
7.6 KiB
C++
263 lines
7.6 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 National Technology & Engineering Solutions of Sandia, LLC (NTESS).
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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-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_cuda_internal_ArrayManagerExecutionThrustDevice_h
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#define vtk_m_cont_cuda_internal_ArrayManagerExecutionThrustDevice_h
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#include <vtkm/cont/ArrayPortalToIterators.h>
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#include <vtkm/cont/ErrorBadAllocation.h>
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#include <vtkm/cont/Storage.h>
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#include <vtkm/cont/cuda/ErrorCuda.h>
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#include <vtkm/cont/cuda/internal/CudaAllocator.h>
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#include <vtkm/cont/cuda/internal/ThrustExceptionHandler.h>
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#include <vtkm/exec/cuda/internal/ArrayPortalFromThrust.h>
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VTKM_THIRDPARTY_PRE_INCLUDE
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#include <thrust/copy.h>
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#include <thrust/device_ptr.h>
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VTKM_THIRDPARTY_POST_INCLUDE
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#include <limits>
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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 cuda
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{
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namespace internal
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{
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/// \c ArrayManagerExecutionThrustDevice provides an implementation for a \c
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/// ArrayManagerExecution class for a thrust device adapter that is designed
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/// for the cuda backend which has separate memory spaces for host and device.
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template <typename T, class StorageTag>
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class ArrayManagerExecutionThrustDevice
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{
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public:
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using ValueType = T;
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using PointerType = T*;
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using difference_type = std::ptrdiff_t;
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using StorageType = vtkm::cont::internal::Storage<ValueType, StorageTag>;
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using PortalType = vtkm::exec::cuda::internal::ArrayPortalFromThrust<T>;
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using PortalConstType = vtkm::exec::cuda::internal::ConstArrayPortalFromThrust<T>;
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VTKM_CONT
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ArrayManagerExecutionThrustDevice(StorageType* storage)
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: Storage(storage)
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, Begin(nullptr)
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, End(nullptr)
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, Capacity(nullptr)
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{
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}
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VTKM_CONT
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~ArrayManagerExecutionThrustDevice() { this->ReleaseResources(); }
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/// Returns the size of the array.
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///
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VTKM_CONT
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vtkm::Id GetNumberOfValues() const { return static_cast<vtkm::Id>(this->End - this->Begin); }
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/// Allocates the appropriate size of the array and copies the given data
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/// into the array.
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///
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VTKM_CONT
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PortalConstType PrepareForInput(bool updateData)
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{
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if (updateData)
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{
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this->CopyToExecution();
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}
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else // !updateData
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{
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// The data in this->Array should already be valid.
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}
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return PortalConstType(this->Begin, this->End);
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}
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/// Workaround for nvcc 7.5 compiler warning bug.
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template <typename DummyType>
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VTKM_CONT PortalConstType _PrepareForInput(bool updateData)
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{
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return this->PrepareForInput(updateData);
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}
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/// Allocates the appropriate size of the array and copies the given data
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/// into the array.
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///
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VTKM_CONT
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PortalType PrepareForInPlace(bool updateData)
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{
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if (updateData)
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{
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this->CopyToExecution();
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}
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else // !updateData
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{
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// The data in this->Array should already be valid.
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}
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return PortalType(this->Begin, this->End);
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}
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/// Workaround for nvcc 7.5 compiler warning bug.
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template <typename DummyType>
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VTKM_CONT PortalType _PrepareForInPlace(bool updateData)
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{
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return this->PrepareForInPlace(updateData);
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}
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/// Allocates the array to the given size.
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///
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VTKM_CONT
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PortalType PrepareForOutput(vtkm::Id numberOfValues)
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{
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// Can we reuse the existing buffer?
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vtkm::Id curCapacity =
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this->Begin != nullptr ? static_cast<vtkm::Id>(this->Capacity - this->Begin) : 0;
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// Just mark a new end if we don't need to increase the allocation:
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if (curCapacity >= numberOfValues)
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{
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this->End = this->Begin + static_cast<difference_type>(numberOfValues);
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return PortalType(this->Begin, this->End);
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}
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const std::size_t maxNumVals = (std::numeric_limits<std::size_t>::max() / sizeof(ValueType));
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if (static_cast<std::size_t>(numberOfValues) > maxNumVals)
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{
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std::ostringstream err;
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err << "Failed to allocate " << numberOfValues << " values on device: "
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<< "Number of bytes is not representable by std::size_t.";
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throw vtkm::cont::ErrorBadAllocation(err.str());
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}
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this->ReleaseResources();
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const std::size_t bufferSize = static_cast<std::size_t>(numberOfValues) * sizeof(ValueType);
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// Attempt to allocate:
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try
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{
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this->Begin =
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static_cast<ValueType*>(vtkm::cont::cuda::internal::CudaAllocator::Allocate(bufferSize));
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}
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catch (const std::exception& error)
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{
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std::ostringstream err;
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err << "Failed to allocate " << bufferSize << " bytes on device: " << error.what();
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throw vtkm::cont::ErrorBadAllocation(err.str());
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}
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this->Capacity = this->Begin + static_cast<difference_type>(numberOfValues);
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this->End = this->Capacity;
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return PortalType(this->Begin, this->End);
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}
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/// Workaround for nvcc 7.5 compiler warning bug.
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template <typename DummyType>
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VTKM_CONT PortalType _PrepareForOutput(vtkm::Id numberOfValues)
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{
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return this->PrepareForOutput(numberOfValues);
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}
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/// Allocates enough space in \c storage and copies the data in the
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/// device vector into it.
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///
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VTKM_CONT
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void RetrieveOutputData(StorageType* storage) const
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{
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storage->Allocate(this->GetNumberOfValues());
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try
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{
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::thrust::copy(thrust::cuda::pointer<ValueType>(this->Begin),
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thrust::cuda::pointer<ValueType>(this->End),
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vtkm::cont::ArrayPortalToIteratorBegin(storage->GetPortal()));
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}
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catch (...)
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{
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vtkm::cont::cuda::internal::throwAsVTKmException();
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}
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}
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/// Resizes the device vector.
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///
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VTKM_CONT void Shrink(vtkm::Id numberOfValues)
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{
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// The operation will succeed even if this assertion fails, but this
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// is still supposed to be a precondition to Shrink.
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VTKM_ASSERT(this->Begin != nullptr && this->Begin + numberOfValues <= this->End);
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this->End = this->Begin + static_cast<difference_type>(numberOfValues);
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}
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/// Frees all memory.
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///
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VTKM_CONT void ReleaseResources()
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{
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if (this->Begin != nullptr)
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{
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vtkm::cont::cuda::internal::CudaAllocator::Free(this->Begin);
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this->Begin = nullptr;
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this->End = nullptr;
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this->Capacity = nullptr;
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}
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}
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private:
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ArrayManagerExecutionThrustDevice(ArrayManagerExecutionThrustDevice<T, StorageTag>&) = delete;
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void operator=(ArrayManagerExecutionThrustDevice<T, StorageTag>&) = delete;
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StorageType* Storage;
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PointerType Begin;
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PointerType End;
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PointerType Capacity;
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VTKM_CONT
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void CopyToExecution()
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{
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try
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{
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this->PrepareForOutput(this->Storage->GetNumberOfValues());
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::thrust::copy(vtkm::cont::ArrayPortalToIteratorBegin(this->Storage->GetPortalConst()),
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vtkm::cont::ArrayPortalToIteratorEnd(this->Storage->GetPortalConst()),
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thrust::cuda::pointer<ValueType>(this->Begin));
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}
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catch (...)
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{
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vtkm::cont::cuda::internal::throwAsVTKmException();
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}
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}
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};
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}
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}
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}
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} // namespace vtkm::cont::cuda::internal
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#endif // vtk_m_cont_cuda_internal_ArrayManagerExecutionThrustDevice_h
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