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MakeParticle SoA: Const Only #3281

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MakeParticle SoA: Const Only #3281

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MakeParticle SoA: Const Only
ax3l Apr 27, 2023
843122b
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ax3l Apr 27, 2023
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45 changes: 24 additions & 21 deletions Src/Particle/AMReX_MakeParticle.H
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Original file line number Diff line number Diff line change
@@ -1,40 +1,43 @@
#ifndef AMREX_MAKEPARTICLE_H_
#define AMREX_MAKEPARTICLE_H_

#include "AMReX_ParticleTile.H"

#include <type_traits>

template< class T >
struct is_soa_particle
: std::integral_constant<
bool,
T::is_soa_particle
> {};

namespace amrex {

template<class T>
struct is_soa_particle
: std::integral_constant<
bool,
T::is_soa_particle
> {
};

template <typename T_ParticleType, class Enable = void>
struct make_particle
{
template <typename PTD>
template<typename T_ParticleType, class Enable = void>
struct make_particle {
template<typename PTD>
AMREX_GPU_HOST_DEVICE AMREX_FORCE_INLINE
auto&
operator() (PTD const& ptd, int i)
{
auto &
operator()(PTD const &ptd, int i) {
// legacy Particle (AoS)
return ptd.m_aos[i];
}
};

template <typename T_ParticleType>
struct make_particle<T_ParticleType, typename std::enable_if<is_soa_particle<T_ParticleType>::value>::type>
{
template <typename PTD>
template<typename T_ParticleType>
struct make_particle<T_ParticleType, typename std::enable_if<is_soa_particle<T_ParticleType>::value>::type> {
template<typename PTD>
AMREX_GPU_HOST_DEVICE AMREX_FORCE_INLINE
auto
operator() (PTD const& ptd, int index)
{
// SoAParticle
return T_ParticleType(ptd, index);
operator()(PTD const &ptd, int index) {
// pure SoA particle (by value)
return ConstSoAParticle<T_ParticleType::NArrayReal, T_ParticleType::NArrayInt>(ptd, index);
}
};

} // namespace amrex

#endif