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communications.hh
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/**
* @file communications.hh
*
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date creation: Wed Sep 07 2016
* @date last modification: Tue Feb 20 2018
*
* @brief Class handling the pending communications and the communications
* schemes
*
* @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 "communication_descriptor.hh"
#include "communicator.hh"
/* -------------------------------------------------------------------------- */
#include <map>
/* -------------------------------------------------------------------------- */
#ifndef __AKANTU_COMMUNICATIONS_HH__
#define __AKANTU_COMMUNICATIONS_HH__
namespace akantu {
/* -------------------------------------------------------------------------- */
template <class Entity> class Communications {
public:
using Scheme = Array<Entity>;
protected:
using CommunicationPerProcs = std::map<Int, Communication>;
using CommunicationsPerTags =
std::map<SynchronizationTag, CommunicationPerProcs>;
using CommunicationSchemes = std::map<Int, Scheme>;
using Request = std::map<Int, std::vector<CommunicationRequest>>;
friend class CommunicationDescriptor<Entity>;
public:
using scheme_iterator = typename CommunicationSchemes::iterator;
using const_scheme_iterator = typename CommunicationSchemes::const_iterator;
/* ------------------------------------------------------------------------ */
class iterator;
class tag_iterator;
/* ------------------------------------------------------------------------ */
public:
CommunicationPerProcs & getCommunications(const SynchronizationTag & tag,
const CommunicationSendRecv & sr);
/* ------------------------------------------------------------------------ */
bool hasPending(const SynchronizationTag & tag,
const CommunicationSendRecv & sr) const;
UInt getPending(const SynchronizationTag & tag,
const CommunicationSendRecv & sr) const;
/* ------------------------------------------------------------------------ */
iterator begin(const SynchronizationTag & tag,
const CommunicationSendRecv & sr);
iterator end(const SynchronizationTag & tag,
const CommunicationSendRecv & sr);
/* ------------------------------------------------------------------------ */
iterator waitAny(const SynchronizationTag & tag,
const CommunicationSendRecv & sr);
/* ------------------------------------------------------------------------ */
void waitAll(const SynchronizationTag & tag,
const CommunicationSendRecv & sr);
void incrementPending(const SynchronizationTag & tag,
const CommunicationSendRecv & sr);
void decrementPending(const SynchronizationTag & tag,
const CommunicationSendRecv & sr);
void freeRequests(const SynchronizationTag & tag,
const CommunicationSendRecv & sr);
/* ------------------------------------------------------------------------ */
Scheme & createScheme(UInt proc, const CommunicationSendRecv & sr);
void resetSchemes(const CommunicationSendRecv & sr);
/* ------------------------------------------------------------------------ */
void setCommunicationSize(const SynchronizationTag & tag, UInt proc,
UInt size, const CommunicationSendRecv & sr);
public:
explicit Communications(const Communicator & communicator);
explicit Communications(const Communications & communications);
/* ------------------------------------------------------------------------ */
void swapSendRecv();
/* ------------------------------------------------------------------------ */
class IterableCommunicationDesc {
public:
IterableCommunicationDesc(Communications & communications,
SynchronizationTag tag, CommunicationSendRecv sr)
: communications(communications), tag(std::move(tag)),
sr(std::move(sr)) {}
auto begin() { return communications.begin(tag, sr); }
auto end() { return communications.end(tag, sr); }
private:
Communications & communications;
SynchronizationTag tag;
CommunicationSendRecv sr;
};
auto iterateRecv(const SynchronizationTag & tag) {
return IterableCommunicationDesc(*this, tag, _recv);
}
auto iterateSend(const SynchronizationTag & tag) {
return IterableCommunicationDesc(*this, tag, _send);
}
/* ------------------------------------------------------------------------ */
// iterator begin_send(const SynchronizationTag & tag);
// iterator end_send(const SynchronizationTag & tag);
/* ------------------------------------------------------------------------ */
// iterator begin_recv(const SynchronizationTag & tag);
// iterator end_recv(const SynchronizationTag & tag);
/* ------------------------------------------------------------------------ */
class IterableTags {
public:
explicit IterableTags(Communications & communications)
: communications(communications) {}
decltype(auto) begin() { return communications.begin_tag(); }
decltype(auto) end() { return communications.end_tag(); }
private:
Communications & communications;
};
decltype(auto) iterateTags() { return IterableTags(*this); }
tag_iterator begin_tag();
tag_iterator end_tag();
/* ------------------------------------------------------------------------ */
bool hasCommunication(const SynchronizationTag & tag) const;
void incrementCounter(const SynchronizationTag & tag);
UInt getCounter(const SynchronizationTag & tag) const;
bool hasCommunicationSize(const SynchronizationTag & tag) const;
void invalidateSizes();
/* ------------------------------------------------------------------------ */
bool hasPendingRecv(const SynchronizationTag & tag) const;
bool hasPendingSend(const SynchronizationTag & tag) const;
const auto & getCommunicator() const;
/* ------------------------------------------------------------------------ */
iterator waitAnyRecv(const SynchronizationTag & tag);
iterator waitAnySend(const SynchronizationTag & tag);
void waitAllRecv(const SynchronizationTag & tag);
void waitAllSend(const SynchronizationTag & tag);
void freeSendRequests(const SynchronizationTag & tag);
void freeRecvRequests(const SynchronizationTag & tag);
/* ------------------------------------------------------------------------ */
/* ------------------------------------------------------------------------ */
class IterableSchemes {
public:
IterableSchemes(Communications & communications, CommunicationSendRecv sr)
: communications(communications), sr(std::move(sr)) {}
decltype(auto) begin() { return communications.begin_scheme(sr); }
decltype(auto) end() { return communications.end_scheme(sr); }
private:
Communications & communications;
CommunicationSendRecv sr;
};
class ConstIterableSchemes {
public:
ConstIterableSchemes(const Communications & communications,
CommunicationSendRecv sr)
: communications(communications), sr(std::move(sr)) {}
decltype(auto) begin() const { return communications.begin_scheme(sr); }
decltype(auto) end() const { return communications.end_scheme(sr); }
private:
const Communications & communications;
CommunicationSendRecv sr;
};
decltype(auto) iterateSchemes(const CommunicationSendRecv & sr) {
return IterableSchemes(*this, sr);
}
decltype(auto) iterateSchemes(const CommunicationSendRecv & sr) const {
return ConstIterableSchemes(*this, sr);
}
decltype(auto) iterateSendSchemes() { return IterableSchemes(*this, _send); }
decltype(auto) iterateSendSchemes() const {
return ConstIterableSchemes(*this, _send);
}
decltype(auto) iterateRecvSchemes() { return IterableSchemes(*this, _recv); }
decltype(auto) iterateRecvSchemes() const {
return ConstIterableSchemes(*this, _recv);
}
scheme_iterator begin_scheme(const CommunicationSendRecv & sr);
scheme_iterator end_scheme(const CommunicationSendRecv & sr);
const_scheme_iterator begin_scheme(const CommunicationSendRecv & sr) const;
const_scheme_iterator end_scheme(const CommunicationSendRecv & sr) const;
/* ------------------------------------------------------------------------ */
scheme_iterator begin_send_scheme();
scheme_iterator end_send_scheme();
const_scheme_iterator begin_send_scheme() const;
const_scheme_iterator end_send_scheme() const;
/* ------------------------------------------------------------------------ */
scheme_iterator begin_recv_scheme();
scheme_iterator end_recv_scheme();
const_scheme_iterator begin_recv_scheme() const;
const_scheme_iterator end_recv_scheme() const;
/* ------------------------------------------------------------------------ */
Scheme & createSendScheme(UInt proc);
Scheme & createRecvScheme(UInt proc);
/* ------------------------------------------------------------------------ */
Scheme & getScheme(UInt proc, const CommunicationSendRecv & sr);
const Scheme & getScheme(UInt proc, const CommunicationSendRecv & sr) const;
/* ------------------------------------------------------------------------ */
void resetSchemes();
/* ------------------------------------------------------------------------ */
void setSendCommunicationSize(const SynchronizationTag & tag, UInt proc,
UInt size);
void setRecvCommunicationSize(const SynchronizationTag & tag, UInt proc,
UInt size);
void initializeCommunications(const SynchronizationTag & tag);
protected:
CommunicationSchemes schemes[2];
CommunicationsPerTags communications[2];
std::map<SynchronizationTag, UInt> comm_counter;
std::map<SynchronizationTag, UInt> pending_communications[2];
std::map<SynchronizationTag, bool> comm_size_computed;
const Communicator & communicator;
};
} // namespace akantu
#include "communications_tmpl.hh"
#endif /* __AKANTU_COMMUNICATIONS_HH__ */

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