88 lines
3.1 KiB
C
88 lines
3.1 KiB
C
|
//============================================================================
|
||
|
// Copyright (c) Kitware, Inc.
|
||
|
// All rights reserved.
|
||
|
// See LICENSE.txt for details.
|
||
|
// This software is distributed WITHOUT ANY WARRANTY; without even
|
||
|
// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
|
||
|
// PURPOSE. See the above copyright notice for more information.
|
||
|
//
|
||
|
// Copyright 2014 Sandia Corporation.
|
||
|
// Copyright 2014 UT-Battelle, LLC.
|
||
|
// Copyright 2014 Los Alamos National Security.
|
||
|
//
|
||
|
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
|
||
|
// the U.S. Government retains certain rights in this software.
|
||
|
//
|
||
|
// Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
|
||
|
// Laboratory (LANL), the U.S. Government retains certain rights in
|
||
|
// this software.
|
||
|
//============================================================================
|
||
|
#ifndef vtk_m_exec_arg_VisitIndex_h
|
||
|
#define vtk_m_exec_arg_VisitIndex_h
|
||
|
|
||
|
#include <vtkm/exec/arg/Fetch.h>
|
||
|
#include <vtkm/exec/arg/ExecutionSignatureTagBase.h>
|
||
|
|
||
|
namespace vtkm {
|
||
|
namespace exec {
|
||
|
namespace arg {
|
||
|
|
||
|
/// \brief Aspect tag to use for getting the work index.
|
||
|
///
|
||
|
/// The \c AspectTagVisitIndex aspect tag causes the \c Fetch class to ignore
|
||
|
/// whatever data is in the associated execution object and return the visit
|
||
|
/// index.
|
||
|
///
|
||
|
struct AspectTagVisitIndex { };
|
||
|
|
||
|
/// \brief The \c ExecutionSignature tag to use to get the visit index
|
||
|
///
|
||
|
/// When a worklet is dispatched, there is a scatter operation defined that
|
||
|
/// optionally allows each input to go to multiple output entries. When one
|
||
|
/// input is assigned to multiple outputs, there needs to be a mechanism to
|
||
|
/// uniquely identify which output is which. The visit index is a value between
|
||
|
/// 0 and the number of outputs a particular input goes to. This tag in the \c
|
||
|
/// ExecutionSignature passes the visit index for this work. \c WorkletBase
|
||
|
/// contains a typedef that points to this class.
|
||
|
///
|
||
|
struct VisitIndex : vtkm::exec::arg::ExecutionSignatureTagBase
|
||
|
{
|
||
|
// The index does not really matter because the fetch is going to ignore it.
|
||
|
// However, it still has to point to a valid parameter in the
|
||
|
// ControlSignature because the templating is going to grab a fetch tag
|
||
|
// whether we use it or not. 1 should be guaranteed to be valid since you
|
||
|
// need at least one argument for the input domain.
|
||
|
static const vtkm::IdComponent INDEX = 1;
|
||
|
typedef vtkm::exec::arg::AspectTagVisitIndex AspectTag;
|
||
|
};
|
||
|
|
||
|
template<typename FetchTag, typename ThreadIndicesType, typename ExecObjectType>
|
||
|
struct Fetch<FetchTag,
|
||
|
vtkm::exec::arg::AspectTagVisitIndex,
|
||
|
ThreadIndicesType,
|
||
|
ExecObjectType>
|
||
|
{
|
||
|
typedef vtkm::IdComponent ValueType;
|
||
|
|
||
|
VTKM_EXEC_EXPORT
|
||
|
vtkm::IdComponent Load(const ThreadIndicesType &indices,
|
||
|
const ExecObjectType &) const
|
||
|
{
|
||
|
return indices.GetVisitIndex();
|
||
|
}
|
||
|
|
||
|
VTKM_EXEC_EXPORT
|
||
|
void Store(const ThreadIndicesType &,
|
||
|
const ExecObjectType &,
|
||
|
const ValueType &) const
|
||
|
{
|
||
|
// Store is a no-op.
|
||
|
}
|
||
|
};
|
||
|
|
||
|
}
|
||
|
}
|
||
|
} // namespace vtkm::exec::arg
|
||
|
|
||
|
#endif //vtk_m_exec_arg_VisitIndex_h
|