vtk-m/vtkm/internal/Invocation.h
Kenneth Moreland c3a3184d51 Update copyright for Sandia
Sandia National Laboratories recently changed management from the
Sandia Corporation to the National Technology & Engineering Solutions
of Sandia, LLC (NTESS). The copyright statements need to be updated
accordingly.
2017-09-20 15:33:44 -06:00

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//============================================================================
// 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 National Technology & Engineering Solutions of Sandia, LLC (NTESS).
// Copyright 2014 UT-Battelle, LLC.
// Copyright 2014 Los Alamos National Security.
//
// Under the terms of Contract DE-NA0003525 with NTESS,
// 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_internal_Invocation_h
#define vtk_m_internal_Invocation_h
#include <vtkm/Types.h>
namespace vtkm
{
namespace internal
{
/// \brief Container for types when dispatching worklets.
///
/// When a dispatcher and associated class invoke a worklet, they need to keep
/// track of the types of all parameters and the associated features of the
/// worklet. \c Invocation is a class that manages all these types.
///
template <typename _ParameterInterface,
typename _ControlInterface,
typename _ExecutionInterface,
vtkm::IdComponent _InputDomainIndex,
typename _OutputToInputMapType = vtkm::internal::NullType,
typename _VisitArrayType = vtkm::internal::NullType>
struct Invocation
{
/// \brief The types of the parameters
///
/// \c ParameterInterface is (expected to be) a \c FunctionInterface class
/// that lists the types of the parameters for the invocation.
///
using ParameterInterface = _ParameterInterface;
/// \brief The tags of the \c ControlSignature.
///
/// \c ControlInterface is (expected to be) a \c FunctionInterface class that
/// represents the \c ControlSignature of a worklet (although dispatchers
/// might modify the control signature to provide auxiliary information).
///
using ControlInterface = _ControlInterface;
/// \brief The tags of the \c ExecutionSignature.
///
/// \c ExecutionInterface is (expected to be) a \c FunctionInterface class that
/// represents the \c ExecutionSignature of a worklet (although dispatchers
/// might modify the execution signature to provide auxiliary information).
///
using ExecutionInterface = _ExecutionInterface;
/// \brief The index of the input domain.
///
/// When a worklet is invoked, the pool of working threads is based of some
/// constituent element of the input (such as the points or cells). This
/// index points to the parameter that defines this input domain.
///
static const vtkm::IdComponent InputDomainIndex = _InputDomainIndex;
/// \brief An array representing the output to input map.
///
/// When a worklet is invoked, there is an optional scatter operation that
/// allows you to vary the number of outputs each input affects. This is
/// represented with a map where each output points to an input that creates
/// it.
///
using OutputToInputMapType = _OutputToInputMapType;
/// \brief An array containing visit indices.
///
/// When a worklet is invoked, there is an optinonal scatter operation that
/// allows you to vary the number of outputs each input affects. Thus,
/// multiple outputs may point to the same input. The visit index uniquely
/// identifies which instance each is.
///
using VisitArrayType = _VisitArrayType;
/// \brief Default Invocation constructors that holds the given parameters
/// by reference.
VTKM_CONT
Invocation(const ParameterInterface& parameters,
OutputToInputMapType outputToInputMap = OutputToInputMapType(),
VisitArrayType visitArray = VisitArrayType())
: Parameters(parameters)
, OutputToInputMap(outputToInputMap)
, VisitArray(visitArray)
{
}
/// Defines a new \c Invocation type that is the same as this type except
/// with the \c Parameters replaced.
///
template <typename NewParameterInterface>
struct ChangeParametersType
{
using type = Invocation<NewParameterInterface,
ControlInterface,
ExecutionInterface,
InputDomainIndex,
OutputToInputMapType,
VisitArrayType>;
};
/// Returns a new \c Invocation that is the same as this one except that the
/// \c Parameters are replaced with those provided.
///
template <typename NewParameterInterface>
VTKM_CONT typename ChangeParametersType<NewParameterInterface>::type ChangeParameters(
const NewParameterInterface& newParameters) const
{
return typename ChangeParametersType<NewParameterInterface>::type(
newParameters, this->OutputToInputMap, this->VisitArray);
}
/// Defines a new \c Invocation type that is the same as this type except
/// with the \c ControlInterface replaced.
///
template <typename NewControlInterface>
struct ChangeControlInterfaceType
{
using type =
Invocation<ParameterInterface, NewControlInterface, ExecutionInterface, InputDomainIndex>;
};
/// Returns a new \c Invocation that is the same as this one except that the
/// \c ControlInterface type is changed to the type given.
///
template <typename NewControlInterface>
typename ChangeControlInterfaceType<NewControlInterface>::type ChangeControlInterface(
NewControlInterface) const
{
return typename ChangeControlInterfaceType<NewControlInterface>::type(
this->Parameters, this->OutputToInputMap, this->VisitArray);
}
/// Defines a new \c Invocation type that is the same as this type except
/// with the \c ExecutionInterface replaced.
///
template <typename NewExecutionInterface>
struct ChangeExecutionInterfaceType
{
using type =
Invocation<ParameterInterface, NewExecutionInterface, ExecutionInterface, InputDomainIndex>;
};
/// Returns a new \c Invocation that is the same as this one except that the
/// \c ExecutionInterface type is changed to the type given.
///
template <typename NewExecutionInterface>
typename ChangeExecutionInterfaceType<NewExecutionInterface>::type ChangeExecutionInterface(
NewExecutionInterface) const
{
return typename ChangeExecutionInterfaceType<NewExecutionInterface>::type(
this->Parameters, this->OutputToInputMap, this->VisitArray);
}
/// Defines a new \c Invocation type that is the same as this type except
/// with the \c InputDomainIndex replaced.
///
template <vtkm::IdComponent NewInputDomainIndex>
struct ChangeInputDomainIndexType
{
using type =
Invocation<ParameterInterface, ControlInterface, ExecutionInterface, NewInputDomainIndex>;
};
/// Returns a new \c Invocation that is the same as this one except that the
/// \c InputDomainIndex is changed to the static number given.
///
template <vtkm::IdComponent NewInputDomainIndex>
VTKM_EXEC_CONT typename ChangeInputDomainIndexType<NewInputDomainIndex>::type
ChangeInputDomainIndex() const
{
return typename ChangeInputDomainIndexType<NewInputDomainIndex>::type(
this->Parameters, this->OutputToInputMap, this->VisitArray);
}
/// Defines a new \c Invocation type that is the same as this type except
/// with the \c OutputToInputMapType replaced.
///
template <typename NewOutputToInputMapType>
struct ChangeOutputToInputMapType
{
using type = Invocation<ParameterInterface,
ControlInterface,
ExecutionInterface,
InputDomainIndex,
NewOutputToInputMapType,
VisitArrayType>;
};
/// Returns a new \c Invocation that is the same as this one except that the
/// \c OutputToInputMap is replaced with that provided.
///
template <typename NewOutputToInputMapType>
VTKM_CONT typename ChangeOutputToInputMapType<NewOutputToInputMapType>::type
ChangeOutputToInputMap(NewOutputToInputMapType newOutputToInputMap) const
{
return typename ChangeOutputToInputMapType<NewOutputToInputMapType>::type(
this->Parameters, newOutputToInputMap, this->VisitArray);
}
/// Defines a new \c Invocation type that is the same as this type except
/// with the \c VisitArrayType replaced.
///
template <typename NewVisitArrayType>
struct ChangeVisitArrayType
{
using type = Invocation<ParameterInterface,
ControlInterface,
ExecutionInterface,
InputDomainIndex,
OutputToInputMapType,
NewVisitArrayType>;
};
/// Returns a new \c Invocation that is the same as this one except that the
/// \c VisitArray is replaced with that provided.
///
template <typename NewVisitArrayType>
VTKM_CONT typename ChangeVisitArrayType<NewVisitArrayType>::type ChangeVisitArray(
NewVisitArrayType newVisitArray) const
{
return typename ChangeVisitArrayType<NewVisitArrayType>::type(
this->Parameters, this->OutputToInputMap, newVisitArray);
}
/// A convenience alias for the input domain type.
///
using InputDomainType =
typename ParameterInterface::template ParameterType<InputDomainIndex>::type;
/// A convenience alias for the control signature tag of the input domain.
///
using InputDomainTag = typename ControlInterface::template ParameterType<InputDomainIndex>::type;
/// A convenience method to get the input domain object.
///
VTKM_SUPPRESS_EXEC_WARNINGS
VTKM_EXEC_CONT
const InputDomainType& GetInputDomain() const
{
return this->Parameters.template GetParameter<InputDomainIndex>();
}
/// The state of an \c Invocation object holds the parameters of the
/// invocation. As well as the output to input map and the visit array.
///
/// This is held by by value so that when we transfer the invocation object
/// over to CUDA it gets properly copied to the device. While we want to
/// hold by reference to reduce the number of copies, it is not possible
/// currently.
const ParameterInterface Parameters;
OutputToInputMapType OutputToInputMap;
VisitArrayType VisitArray;
private:
// Do not allow assignment of one Invocation to another. It is too expensive.
void operator=(const Invocation<ParameterInterface,
ControlInterface,
ExecutionInterface,
InputDomainIndex,
OutputToInputMapType,
VisitArrayType>&) = delete;
};
/// Convenience function for creating an Invocation object.
///
template <vtkm::IdComponent InputDomainIndex,
typename ControlInterface,
typename ExecutionInterface,
typename ParameterInterface,
typename OutputToInputMapType,
typename VisitArrayType>
VTKM_CONT vtkm::internal::Invocation<ParameterInterface,
ControlInterface,
ExecutionInterface,
InputDomainIndex,
OutputToInputMapType,
VisitArrayType>
make_Invocation(const ParameterInterface& params,
ControlInterface,
ExecutionInterface,
OutputToInputMapType outputToInputMap,
VisitArrayType visitArray)
{
return vtkm::internal::Invocation<ParameterInterface,
ControlInterface,
ExecutionInterface,
InputDomainIndex,
OutputToInputMapType,
VisitArrayType>(params, outputToInputMap, visitArray);
}
template <vtkm::IdComponent InputDomainIndex,
typename ControlInterface,
typename ExecutionInterface,
typename ParameterInterface>
VTKM_CONT vtkm::internal::
Invocation<ParameterInterface, ControlInterface, ExecutionInterface, InputDomainIndex>
make_Invocation(const ParameterInterface& params,
ControlInterface = ControlInterface(),
ExecutionInterface = ExecutionInterface())
{
return vtkm::internal::make_Invocation<InputDomainIndex>(params,
ControlInterface(),
ExecutionInterface(),
vtkm::internal::NullType(),
vtkm::internal::NullType());
}
}
} // namespace vtkm::internal
#endif //vtk_m_internal_Invocation_h