mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-20 02:55:47 +00:00
a47fd42bc1
Often when a user gives memory to an `ArrayHandle`, she wants data to be written into the memory given to be used elsewhere. Previously, the `Buffer` objects would delete the given buffer as soon as a write buffer was created elsewhere. That was a problem if a user wants VTK-m to write results right into a given buffer. Instead, when a user provides memory, "pin" that memory so that the `ArrayHandle` never deletes it.
89 lines
2.8 KiB
C++
89 lines
2.8 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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#include <vtkm/cont/internal/DeviceAdapterMemoryManagerShared.h>
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#include <cstring>
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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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vtkm::cont::internal::BufferInfo DeviceAdapterMemoryManagerShared::Allocate(
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vtkm::BufferSizeType size) const
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{
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return vtkm::cont::internal::BufferInfo(vtkm::cont::internal::AllocateOnHost(size),
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this->GetDevice());
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}
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vtkm::cont::internal::BufferInfo DeviceAdapterMemoryManagerShared::CopyHostToDevice(
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const vtkm::cont::internal::BufferInfo& src) const
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{
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VTKM_ASSERT(src.GetDevice() == vtkm::cont::DeviceAdapterTagUndefined{});
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return vtkm::cont::internal::BufferInfo(src, this->GetDevice());
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}
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void DeviceAdapterMemoryManagerShared::CopyHostToDevice(
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const vtkm::cont::internal::BufferInfo& src,
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const vtkm::cont::internal::BufferInfo& dest) const
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{
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VTKM_ASSERT(src.GetDevice() == vtkm::cont::DeviceAdapterTagUndefined{});
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VTKM_ASSERT(dest.GetDevice() == this->GetDevice());
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if (src.GetPointer() != dest.GetPointer())
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{
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this->CopyDeviceToDevice(src, dest);
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}
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}
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vtkm::cont::internal::BufferInfo DeviceAdapterMemoryManagerShared::CopyDeviceToHost(
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const vtkm::cont::internal::BufferInfo& src) const
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{
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VTKM_ASSERT(src.GetDevice() == this->GetDevice());
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return vtkm::cont::internal::BufferInfo(src, vtkm::cont::DeviceAdapterTagUndefined{});
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}
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void DeviceAdapterMemoryManagerShared::CopyDeviceToHost(
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const vtkm::cont::internal::BufferInfo& src,
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const vtkm::cont::internal::BufferInfo& dest) const
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{
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VTKM_ASSERT(src.GetDevice() == this->GetDevice());
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VTKM_ASSERT(dest.GetDevice() == vtkm::cont::DeviceAdapterTagUndefined{});
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if (src.GetPointer() != dest.GetPointer())
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{
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this->CopyDeviceToDevice(src, dest);
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}
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}
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vtkm::cont::internal::BufferInfo DeviceAdapterMemoryManagerShared::CopyDeviceToDevice(
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const vtkm::cont::internal::BufferInfo& src) const
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{
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VTKM_ASSERT(src.GetDevice() == this->GetDevice());
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vtkm::BufferSizeType size = src.GetSize();
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vtkm::cont::internal::BufferInfo dest = this->Allocate(size);
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this->CopyDeviceToDevice(src, dest);
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return dest;
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}
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void DeviceAdapterMemoryManagerShared::CopyDeviceToDevice(
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const vtkm::cont::internal::BufferInfo& src,
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const vtkm::cont::internal::BufferInfo& dest) const
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{
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VTKM_ASSERT(src.GetSize() == dest.GetSize());
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std::memcpy(dest.GetPointer(), src.GetPointer(), static_cast<std::size_t>(src.GetSize()));
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}
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}
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}
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} // namespace vtkm::cont::internal
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