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data_accessor.hh
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/**
* Copyright (©) 2010-2023 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* This file is part of Akantu
*
* Akantu is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free
* Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* Akantu is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
* A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Akantu. If not, see <http://www.gnu.org/licenses/>.
*/
/* -------------------------------------------------------------------------- */
#include "aka_common.hh"
#include "communication_buffer.hh"
#include "element.hh"
/* -------------------------------------------------------------------------- */
#ifndef AKANTU_DATA_ACCESSOR_HH_
#define AKANTU_DATA_ACCESSOR_HH_
namespace akantu {
class FEEngine;
} // namespace akantu
namespace akantu {
class DataAccessorBase {
public:
DataAccessorBase() = default;
virtual ~DataAccessorBase() = default;
DataAccessorBase(const DataAccessorBase & other) = default;
DataAccessorBase(DataAccessorBase && other) = default;
DataAccessorBase & operator=(const DataAccessorBase & other) = default;
DataAccessorBase & operator=(DataAccessorBase && other) = default;
};
template <class T> class DataAccessor : public virtual DataAccessorBase {
/* ------------------------------------------------------------------------ */
/* Constructors/Destructors */
/* ------------------------------------------------------------------------ */
public:
DataAccessor() = default;
/* ------------------------------------------------------------------------ */
/* Methods */
/* ------------------------------------------------------------------------ */
public:
/**
* @brief get the number of data to exchange for a given array of T
* (elements or dofs) and a given akantu::SynchronizationTag
*/
virtual Int getNbData(const Array<T> & elements,
const SynchronizationTag & tag) const = 0;
/**
* @brief pack the data for a given array of T (elements or dofs) and a given
* akantu::SynchronizationTag
*/
virtual void packData(CommunicationBuffer & buffer, const Array<T> & element,
const SynchronizationTag & tag) const = 0;
/**
* @brief unpack the data for a given array of T (elements or dofs) and a
* given akantu::SynchronizationTag
*/
virtual void unpackData(CommunicationBuffer & buffer,
const Array<T> & element,
const SynchronizationTag & tag) = 0;
};
/* -------------------------------------------------------------------------- */
/* Specialization */
/* -------------------------------------------------------------------------- */
template <> class DataAccessor<Element> : public virtual DataAccessorBase {
public:
DataAccessor() = default;
[[nodiscard]] virtual Int
getNbData(const Array<Element> & /*elements*/,
const SynchronizationTag & /*tag*/) const {
return 0;
};
virtual void packData(CommunicationBuffer & /*buffer*/,
const Array<Element> & /*element*/,
const SynchronizationTag & /*tag*/) const {};
virtual void unpackData(CommunicationBuffer & /*buffer*/,
const Array<Element> & /*element*/,
const SynchronizationTag & /*tag*/){};
private:
template <
typename T, bool pack_helper, class Func,
std::enable_if_t<not std::is_base_of_v<FEEngine, std::decay_t<Func>>> * =
nullptr>
static void packUnpackElementalDataHelper(
std::conditional_t<pack_helper, const ElementTypeMapArray<T>,
ElementTypeMapArray<T>> & data_to_pack,
CommunicationBuffer & buffer, const Array<Element> & element,
Func && data_per_element);
/* ------------------------------------------------------------------------ */
public:
template <typename T, bool pack_helper>
static void packUnpackNodalDataHelper(
std::conditional_t<pack_helper, const Array<T>, Array<T>> & data,
CommunicationBuffer & buffer, const Array<Element> & elements,
const Mesh & mesh);
/* ------------------------------------------------------------------------ */
template <typename T, bool pack_helper>
static void packUnpackElementalDataHelper(
std::conditional_t<pack_helper, const ElementTypeMapArray<T>,
ElementTypeMapArray<T>> & data_to_pack,
CommunicationBuffer & buffer, const Array<Element> & element);
/* ------------------------------------------------------------------------ */
template <typename T, bool pack_helper>
static void packUnpackElementalDataHelper(
std::conditional_t<pack_helper, const ElementTypeMapArray<T>,
ElementTypeMapArray<T>> & data_to_pack,
CommunicationBuffer & buffer, const Array<Element> & element,
const FEEngine & fem);
/* ------------------------------------------------------------------------ */
template <typename T>
static void
packNodalDataHelper(const Array<T> & data, CommunicationBuffer & buffer,
const Array<Element> & elements, const Mesh & mesh) {
packUnpackNodalDataHelper<T, true>(data, buffer, elements, mesh);
}
template <typename T>
static inline void
unpackNodalDataHelper(Array<T> & data, CommunicationBuffer & buffer,
const Array<Element> & elements, const Mesh & mesh) {
packUnpackNodalDataHelper<T, false>(data, buffer, elements, mesh);
}
/* ------------------------------------------------------------------------ */
template <typename T>
static inline void
packElementalDataHelper(const ElementTypeMapArray<T> & data_to_pack,
CommunicationBuffer & buffer,
const Array<Element> & elements) {
packUnpackElementalDataHelper<T, true>(data_to_pack, buffer, elements);
}
template <typename T>
static inline void
unpackElementalDataHelper(ElementTypeMapArray<T> & data_to_unpack,
CommunicationBuffer & buffer,
const Array<Element> & elements) {
packUnpackElementalDataHelper<T, false>(data_to_unpack, buffer, elements);
}
/* ------------------------------------------------------------------------ */
template <typename T>
static inline void packElementalDataHelper(
const ElementTypeMapArray<T> & data_to_pack, CommunicationBuffer & buffer,
const Array<Element> & elements, const FEEngine & fem) {
packUnpackElementalDataHelper<T, true>(data_to_pack, buffer, elements, fem);
}
template <typename T>
static inline void unpackElementalDataHelper(
ElementTypeMapArray<T> & data_to_unpack, CommunicationBuffer & buffer,
const Array<Element> & elements, const FEEngine & fem) {
packUnpackElementalDataHelper<T, false>(data_to_unpack, buffer, elements,
fem);
}
};
/* -------------------------------------------------------------------------- */
/* -------------------------------------------------------------------------- */
template <> class DataAccessor<Idx> : public virtual DataAccessorBase {
public:
DataAccessor() = default;
[[nodiscard]] virtual Int
getNbData(const Array<Idx> & /*elements*/,
const SynchronizationTag & /*tag*/) const {
return 0;
}
virtual void packData(CommunicationBuffer & /*buffer*/,
const Array<Idx> & /*element*/,
const SynchronizationTag & /*tag*/) const {}
virtual void unpackData(CommunicationBuffer & /*buffer*/,
const Array<Idx> & /*element*/,
const SynchronizationTag & /*tag*/) {}
/* ------------------------------------------------------------------------ */
public:
template <typename T, bool pack_helper>
static void packUnpackDOFDataHelper(
std::conditional_t<pack_helper, const Array<T>, Array<T>> & data,
CommunicationBuffer & buffer, const Array<Idx> & dofs);
template <typename T>
static inline void packDOFDataHelper(const Array<T> & data_to_pack,
CommunicationBuffer & buffer,
const Array<Idx> & dofs) {
packUnpackDOFDataHelper<T, true>(data_to_pack, buffer, dofs);
}
template <typename T>
static inline void unpackDOFDataHelper(Array<T> & data_to_unpack,
CommunicationBuffer & buffer,
const Array<Idx> & dofs) {
packUnpackDOFDataHelper<T, false>(data_to_unpack, buffer, dofs);
}
};
/* -------------------------------------------------------------------------- */
template <typename T> class AddOperation {
public:
inline T operator()(const T & a, const T & b) { return a + b; };
};
template <typename T> class IdentityOperation {
public:
inline T operator()(const T & /*unused*/, const T & b) { return b; };
};
/* -------------------------------------------------------------------------- */
/* -------------------------------------------------------------------------- */
template <class Entity, template <class> class Op, class T>
class ReduceDataAccessor : public virtual DataAccessor<Entity> {
/* ------------------------------------------------------------------------ */
/* Constructors/Destructors */
/* ------------------------------------------------------------------------ */
public:
ReduceDataAccessor(Array<T> & data, const SynchronizationTag & tag)
: data(data), tag(tag) {}
/* ------------------------------------------------------------------------ */
/* Methods */
/* ------------------------------------------------------------------------ */
public:
/* ------------------------------------------------------------------------ */
[[nodiscard]] Int getNbData(const Array<Entity> & entities,
const SynchronizationTag & tag) const override {
if (tag != this->tag) {
return 0;
}
Vector<T> tmp(data.getNbComponent());
return entities.size() * CommunicationBuffer::sizeInBuffer(tmp);
}
/* ------------------------------------------------------------------------ */
void packData(CommunicationBuffer & buffer, const Array<Entity> & entities,
const SynchronizationTag & tag) const override {
if (tag != this->tag) {
return;
}
auto data_it = data.begin(data.getNbComponent());
for (auto el : entities) {
buffer << data_it[el];
}
}
/* ------------------------------------------------------------------------ */
void unpackData(CommunicationBuffer & buffer, const Array<Entity> & entities,
const SynchronizationTag & tag) override {
if (tag != this->tag) {
return;
}
auto data_it = data.begin(data.getNbComponent());
for (auto el : entities) {
Vector<T> unpacked(data.getNbComponent());
auto && vect(data_it[el]);
buffer >> unpacked;
vect = oper(vect, unpacked);
}
}
protected:
/// data to (un)pack
Array<T> & data;
/// Tag to consider
SynchronizationTag tag;
/// reduction operator
Op<Vector<T>> oper;
};
/* -------------------------------------------------------------------------- */
template <class T>
using SimpleIdxDataAccessor = ReduceDataAccessor<Idx, IdentityOperation, T>;
/* -------------------------------------------------------------------------- */
template <class T>
class SimpleElementDataAccessor : public virtual DataAccessor<Element> {
/* ------------------------------------------------------------------------ */
/* Constructors/Destructors */
/* ------------------------------------------------------------------------ */
public:
SimpleElementDataAccessor(ElementTypeMapArray<T> & data,
const SynchronizationTag & tag)
: data(data), tag(tag) {}
/* ------------------------------------------------------------------------ */
/* Methods */
/* ------------------------------------------------------------------------ */
public:
/* ------------------------------------------------------------------------ */
[[nodiscard]] Int getNbData(const Array<Element> & elements,
const SynchronizationTag & tag) const override {
if (tag != this->tag) {
return 0;
}
Int size = 0;
for (const auto & el : elements) {
auto && data_type = data(el.type, el.ghost_type);
size += sizeof(T) * data_type.getNbComponent();
}
return size;
}
/* ------------------------------------------------------------------------ */
void packData(CommunicationBuffer & buffer, const Array<Element> & elements,
const SynchronizationTag & tag) const override {
if (tag != this->tag) {
return;
}
for (const auto & el : elements) {
auto && data_type = data(el.type, el.ghost_type);
for (auto c : arange(data_type.getNbComponent())) {
const auto & data_per_element = data_type(el.element, c);
buffer << data_per_element;
}
}
}
/* ------------------------------------------------------------------------ */
void unpackData(CommunicationBuffer & buffer, const Array<Element> & elements,
const SynchronizationTag & tag) override {
if (tag != this->tag) {
return;
}
for (const auto & el : elements) {
auto && data_type = data(el.type, el.ghost_type);
for (auto c : arange(data_type.getNbComponent())) {
auto & data_per_element = data_type(el.element, c);
buffer >> data_per_element;
}
}
}
protected:
/// data to (un)pack
ElementTypeMapArray<T> & data;
/// Tag to consider
SynchronizationTag tag;
};
} // namespace akantu
#include "data_accessor_tmpl.hh"
#endif /* AKANTU_DATA_ACCESSOR_HH_ */

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