70 lines
2.3 KiB
C++
70 lines
2.3 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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// 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_cuda_internal_CudaAllocator_h
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#define vtk_m_cont_cuda_internal_CudaAllocator_h
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#include <vtkm/cont/vtkm_cont_export.h>
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#include <vtkm/internal/ExportMacros.h>
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#include <cstddef>
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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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/// Collection of cuda-specific memory management operations.
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struct VTKM_CONT_EXPORT CudaAllocator
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{
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/// Returns true if all detected CUDA devices support pageable managed memory
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/// that can be accessed concurrently by the CPU and GPUs.
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static VTKM_CONT bool UsingManagedMemory();
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/// Returns true if the pointer is accessible from a CUDA device.
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static VTKM_CONT bool IsDevicePointer(const void* ptr);
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/// Returns true if the pointer is a CUDA pointer allocated with
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/// cudaMallocManaged.
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static VTKM_CONT bool IsManagedPointer(const void* ptr);
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static VTKM_CONT void* Allocate(std::size_t numBytes);
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static VTKM_CONT void Free(void* ptr);
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static VTKM_CONT void PrepareForControl(const void* ptr, std::size_t numBytes);
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static VTKM_CONT void PrepareForInput(const void* ptr, std::size_t numBytes);
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static VTKM_CONT void PrepareForOutput(const void* ptr, std::size_t numBytes);
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static VTKM_CONT void PrepareForInPlace(const void* ptr, std::size_t numBytes);
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private:
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static VTKM_CONT void Initialize();
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};
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}
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}
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}
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} // end namespace vtkm::cont::cuda::internal
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#endif // vtk_m_cont_cuda_internal_CudaAllocator_h
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