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communication_buffer_inline_impl.hh
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Mon, May 6, 11:09

communication_buffer_inline_impl.hh
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/**
* Copyright (©) 2011-2023 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 "communication_buffer.hh"
#include <cstring>
/* -------------------------------------------------------------------------- */
namespace akantu {
// NOLINTBEGIN(cppcoreguidelines-pro-bounds-pointer-arithmetic,
// cppcoreguidelines-pro-type-reinterpret-cast,
// cppcoreguidelines-narrowing-conversions)
/* -------------------------------------------------------------------------- */
template <bool is_static>
template <typename T, std::enable_if_t<std::is_standard_layout_v<T> and
not aka::is_tensor_v<T>> *>
inline std::size_t
CommunicationBufferTemplated<is_static>::sizeInBuffer(const T & /*unused*/) {
return sizeof(T);
}
template <bool is_static>
template <typename Tensor, std::enable_if_t<aka::is_tensor_v<Tensor>> *>
inline std::size_t
CommunicationBufferTemplated<is_static>::sizeInBuffer(const Tensor & data) {
std::size_t size = data.size() * sizeof(typename Tensor::Scalar);
return size;
}
template <bool is_static>
template <typename T>
inline std::size_t CommunicationBufferTemplated<is_static>::sizeInBuffer(
const std::vector<T> & data) {
std::size_t size = data.size() * sizeof(T) + sizeof(size_t);
return size;
}
template <bool is_static>
inline std::size_t CommunicationBufferTemplated<is_static>::sizeInBuffer(
const std::string & data) {
std::size_t size =
data.size() * sizeof(std::string::value_type) + sizeof(size_t);
return size;
}
/* -------------------------------------------------------------------------- */
template <bool is_static>
inline void
CommunicationBufferTemplated<is_static>::packResize(std::size_t size) {
if (not is_static) {
char * values = buffer.data();
auto nb_packed = ptr_pack - values;
if (std::size_t(buffer.size()) > nb_packed + size) {
return;
}
buffer.resize(nb_packed + size);
ptr_pack = buffer.data() + nb_packed;
ptr_unpack = buffer.data() + (ptr_unpack - values);
}
}
/* -------------------------------------------------------------------------- */
template <bool is_static>
template <typename T, std::enable_if_t<std::is_standard_layout_v<T> and
not aka::is_tensor_v<T>> *>
inline CommunicationBufferTemplated<is_static> &
CommunicationBufferTemplated<is_static>::operator<<(const T & to_pack) {
std::size_t size = sizeInBuffer(to_pack);
packResize(size);
AKANTU_DEBUG_ASSERT(
(buffer.data() + buffer.size()) >= (ptr_pack + size),
"Packing too much data in the CommunicationBufferTemplated");
std::memcpy(ptr_pack, reinterpret_cast<const char *>(&to_pack), size);
ptr_pack += size;
return *this;
}
/* -------------------------------------------------------------------------- */
template <bool is_static>
template <typename T, std::enable_if_t<std::is_standard_layout_v<T> and
not aka::is_tensor_v<T>> *>
inline CommunicationBufferTemplated<is_static> &
CommunicationBufferTemplated<is_static>::operator>>(T & to_unpack) {
std::size_t size = sizeInBuffer(to_unpack);
alignas(alignof(T)) std::array<char, sizeof(T)> aligned_ptr;
std::memcpy(aligned_ptr.data(), ptr_unpack, size);
auto * tmp = reinterpret_cast<T *>(aligned_ptr.data());
AKANTU_DEBUG_ASSERT(
(buffer.data() + buffer.size()) >= (ptr_unpack + size),
"Unpacking too much data in the CommunicationBufferTemplated");
to_unpack = *tmp;
// memcpy(reinterpret_cast<char *>(&to_unpack), ptr_unpack, size);
ptr_unpack += size;
return *this;
}
/* -------------------------------------------------------------------------- */
template <bool is_static>
template <typename Tensor, std::enable_if_t<aka::is_tensor_v<Tensor>> *>
inline CommunicationBufferTemplated<is_static> &
CommunicationBufferTemplated<is_static>::operator<<(const Tensor & to_pack) {
std::size_t size = sizeInBuffer(to_pack);
packResize(size);
AKANTU_DEBUG_ASSERT(
(buffer.data() + buffer.size()) >= (ptr_pack + size),
"Packing too much data in the CommunicationBufferTemplated");
std::memcpy(ptr_pack, to_pack.data(), size);
ptr_pack += size;
return *this;
}
/* --------------------------------------------------------------------------
*/
template <bool is_static>
template <typename Tensor, std::enable_if_t<aka::is_tensor_v<Tensor>> *>
inline CommunicationBufferTemplated<is_static> &
CommunicationBufferTemplated<is_static>::operator>>(Tensor & to_unpack) {
std::size_t size = sizeInBuffer(to_unpack);
AKANTU_DEBUG_ASSERT(
(buffer.data() + buffer.size()) >= (ptr_unpack + size),
"Unpacking too much data in the CommunicationBufferTemplated");
std::memcpy(to_unpack.data(), ptr_unpack, size);
ptr_unpack += size;
return *this;
}
/* --------------------------------------------------------------------------
*/
template <bool is_static>
template <typename T>
inline void CommunicationBufferTemplated<is_static>::packIterable(T & to_pack) {
operator<<(std::size_t(to_pack.size()));
auto it = to_pack.begin();
auto end = to_pack.end();
for (; it != end; ++it) {
operator<<(*it);
}
}
/* --------------------------------------------------------------------------
*/
template <bool is_static>
template <typename T>
inline void
CommunicationBufferTemplated<is_static>::unpackIterable(T & to_unpack) {
std::size_t size{};
operator>>(size);
to_unpack.resize(size);
auto it = to_unpack.begin();
auto end = to_unpack.end();
for (; it != end; ++it) {
operator>>(*it);
}
}
/**
* std::vector<T>
*/
/* --------------------------------------------------------------------------
*/
template <bool is_static>
template <typename T>
inline CommunicationBufferTemplated<is_static> &
CommunicationBufferTemplated<is_static>::operator<<(
const std::vector<T> & to_pack) {
packIterable(to_pack);
return *this;
}
/* --------------------------------------------------------------------------
*/
template <bool is_static>
template <typename T>
inline CommunicationBufferTemplated<is_static> &
CommunicationBufferTemplated<is_static>::operator>>(
std::vector<T> & to_unpack) {
unpackIterable(to_unpack);
return *this;
}
/**
* std::string
*/
/* --------------------------------------------------------------------------
*/
template <bool is_static>
inline CommunicationBufferTemplated<is_static> &
CommunicationBufferTemplated<is_static>::operator<<(
const std::string & to_pack) {
packIterable(to_pack);
return *this;
}
/* --------------------------------------------------------------------------
*/
template <bool is_static>
inline CommunicationBufferTemplated<is_static> &
CommunicationBufferTemplated<is_static>::operator>>(std::string & to_unpack) {
unpackIterable(to_unpack);
return *this;
}
/* --------------------------------------------------------------------------
*/
template <bool is_static>
template <typename T>
inline std::string
CommunicationBufferTemplated<is_static>::extractStream(std::size_t block_size) {
std::stringstream str;
auto * ptr = reinterpret_cast<T *>(buffer.data());
auto sz = buffer.size() / sizeof(T);
auto sz_block = block_size / sizeof(T);
std::size_t n_block = 0;
for (std::size_t i = 0; i < sz; ++i) {
if (i % sz_block == 0) {
str << "\n" << n_block << " ";
++n_block;
}
str << *ptr << " ";
++ptr;
}
return str.str();
}
/* --------------------------------------------------------------------------
*/
template <bool is_static>
inline void CommunicationBufferTemplated<is_static>::resize(std::size_t size) {
if (!is_static) {
buffer.resize(0, 0);
} else {
buffer.resize(size, 0);
}
reset();
#ifndef AKANTU_NDEBUG
zero();
#endif
}
/* --------------------------------------------------------------------------
*/
template <bool is_static>
inline void CommunicationBufferTemplated<is_static>::reserve(std::size_t size) {
char * values = buffer.data();
std::size_t nb_packed = ptr_pack - values;
buffer.resize(size);
ptr_pack = buffer.data() + nb_packed;
ptr_unpack = buffer.data() + (ptr_unpack - values);
}
/* --------------------------------------------------------------------------
*/
template <bool is_static>
inline void CommunicationBufferTemplated<is_static>::zero() {
buffer.zero();
}
/* --------------------------------------------------------------------------
*/
template <bool is_static>
inline void CommunicationBufferTemplated<is_static>::reset() {
ptr_pack = buffer.data();
ptr_unpack = buffer.data();
}
// NOLINTEND(cppcoreguidelines-pro-bounds-pointer-arithmetic,
// cppcoreguidelines-pro-type-reinterpret-cast,
// cppcoreguidelines-narrowing-conversions)
} // namespace akantu

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