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communication_descriptor.hh
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/**
* @file communication_descriptor.hh
*
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date creation: Wed Sep 07 2016
* @date last modification: Thu Jan 25 2018
*
* @brief Implementation of the helper classes for the synchronizer
*
* @section LICENSE
*
* Copyright (©) 2016-2018 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* 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_array.hh"
#include "communication_request.hh"
#include "communication_tag.hh"
#include "data_accessor.hh"
/* -------------------------------------------------------------------------- */
#ifndef __AKANTU_COMMUNICATION_DESCRIPTOR_HH__
#define __AKANTU_COMMUNICATION_DESCRIPTOR_HH__
namespace akantu {
/* ------------------------------------------------------------------------ */
enum CommunicationSendRecv { _send, _recv, _csr_not_defined };
/* -------------------------------------------------------------------------- */
struct CommunicationSRType {
using type = CommunicationSendRecv;
static const type _begin_ = _send;
static const type _end_ = _csr_not_defined;
};
using send_recv_t = safe_enum<CommunicationSRType>;
namespace {
send_recv_t iterate_send_recv{};
}
/* ------------------------------------------------------------------------ */
class Communication {
public:
explicit Communication(const CommunicationSendRecv & type = _csr_not_defined)
: _type(type) {}
Communication(const Communication &) = delete;
Communication & operator=(const Communication &) = delete;
void resize(UInt size) {
this->_size = size;
this->_buffer.resize(size);
}
inline const CommunicationSendRecv & type() const { return this->_type; }
inline const UInt & size() const { return this->_size; }
inline const CommunicationRequest & request() const { return this->_request; }
inline CommunicationRequest & request() { return this->_request; }
inline const CommunicationBuffer & buffer() const { return this->_buffer; }
inline CommunicationBuffer & buffer() { return this->_buffer; }
private:
UInt _size{0};
CommunicationBuffer _buffer;
CommunicationRequest _request;
CommunicationSendRecv _type;
};
template <class Entity> class Communications;
/* ------------------------------------------------------------------------ */
template <class Entity> class CommunicationDescriptor {
public:
CommunicationDescriptor(Communication & communication, Array<Entity> & scheme,
Communications<Entity> & communications,
const SynchronizationTag & tag, UInt proc);
CommunicationDescriptor(const CommunicationDescriptor &) = default;
CommunicationDescriptor &
operator=(const CommunicationDescriptor &) = default;
/// get the quantity of data in the buffer
UInt getNbData() { return communication.size(); }
/// set the quantity of data in the buffer
void setNbData(UInt size) { communication.resize(size); }
/// get the corresponding tag
const SynchronizationTag & getTag() const { return tag; }
/// get the data buffer
CommunicationBuffer & getBuffer();
/// get the corresponding request
CommunicationRequest & getRequest();
/// get the communication scheme
const Array<Entity> & getScheme();
/// reset the buffer before pack or after unpack
void resetBuffer();
/// pack data for entities in the buffer
void packData(const DataAccessor<Entity> & accessor);
/// unpack data for entities from the buffer
void unpackData(DataAccessor<Entity> & accessor);
/// posts asynchronous send requests
void postSend(int hash_id);
/// posts asynchronous receive requests
void postRecv(int hash_id);
/// free the request
void freeRequest();
UInt getProc() { return proc; }
protected:
Communication & communication;
const Array<Entity> & scheme;
Communications<Entity> & communications;
const SynchronizationTag & tag;
UInt proc;
UInt rank;
UInt counter;
};
/* -------------------------------------------------------------------------- */
} // namespace akantu
#include "communication_descriptor_tmpl.hh"
#endif /* __AKANTU_COMMUNICATION_DESCRIPTOR_HH__ */

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