129 lines
3.9 KiB
C++
129 lines
3.9 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 Sandia Corporation.
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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-AC04-94AL85000 with Sandia Corporation,
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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_internal_ArrayManagerExecutionShareWithControl_h
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#define vtk_m_cont_internal_ArrayManagerExecutionShareWithControl_h
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#include <vtkm/Assert.h>
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#include <vtkm/Types.h>
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#include <vtkm/cont/Storage.h>
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#include <algorithm>
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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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/// \c ArrayManagerExecutionShareWithControl provides an implementation for a
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/// \c ArrayManagerExecution class for a device adapter when the execution
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/// and control environments share memory. This class basically defers all its
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/// calls to a \c Storage class and uses the array allocated there.
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///
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template <typename T, class StorageTag>
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class ArrayManagerExecutionShareWithControl
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{
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public:
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typedef T ValueType;
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typedef vtkm::cont::internal::Storage<ValueType, StorageTag> StorageType;
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typedef typename StorageType::PortalType PortalType;
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typedef typename StorageType::PortalConstType PortalConstType;
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VTKM_CONT
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ArrayManagerExecutionShareWithControl(StorageType* storage)
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: Storage(storage)
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{
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}
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/// Returns the size of the storage.
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///
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VTKM_CONT
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vtkm::Id GetNumberOfValues() const { return this->Storage->GetNumberOfValues(); }
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/// Returns the constant portal from the storage.
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///
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VTKM_CONT
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PortalConstType PrepareForInput(bool vtkmNotUsed(uploadData)) const
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{
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return this->Storage->GetPortalConst();
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}
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/// Returns the read-write portal from the storage.
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///
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VTKM_CONT
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PortalType PrepareForInPlace(bool vtkmNotUsed(uploadData)) { return this->Storage->GetPortal(); }
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/// Allocates data in the storage and return the portal to that.
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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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this->Storage->Allocate(numberOfValues);
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return this->Storage->GetPortal();
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}
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/// This method is a no-op (except for a few checks). Any data written to
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/// this class's portals should already be written to the given \c
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/// controlArray (under correct operation).
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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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(void)storage;
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VTKM_ASSERT(storage == this->Storage);
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}
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/// This methods copies data from the execution array into the given
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/// iterator.
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///
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template <class IteratorTypeControl>
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VTKM_CONT void CopyInto(IteratorTypeControl dest) const
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{
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typedef typename StorageType::PortalConstType::IteratorType IteratorType;
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IteratorType beginIterator = this->Storage->GetPortalConst().GetIteratorBegin();
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std::copy(beginIterator, beginIterator + this->Storage->GetNumberOfValues(), dest);
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}
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/// Shrinks the storage.
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///
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VTKM_CONT
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void Shrink(vtkm::Id numberOfValues) { this->Storage->Shrink(numberOfValues); }
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/// A no-op.
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///
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VTKM_CONT
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void ReleaseResources() {}
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private:
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ArrayManagerExecutionShareWithControl(ArrayManagerExecutionShareWithControl<T, StorageTag>&) =
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delete;
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void operator=(ArrayManagerExecutionShareWithControl<T, StorageTag>&) = delete;
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StorageType* Storage;
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};
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}
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}
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} // namespace vtkm::cont::internal
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#endif //vtk_m_cont_internal_ArrayManagerExecutionShareWithControl_h
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