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communicator_dummy_inline_impl.hh
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/**
* @file communicator_dummy_inline_impl.hh
*
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date creation: Tue Nov 07 2017
* @date last modification: Wed Dec 09 2020
*
* @brief Dummy communicator to make everything work im sequential
*
*
* @section LICENSE
*
* Copyright (©) 2016-2021 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 "communicator.hh"
/* -------------------------------------------------------------------------- */
#include <cstring>
#include <type_traits>
#include <vector>
/* -------------------------------------------------------------------------- */
namespace akantu {
Communicator::Communicator(int & /*argc*/, char **& /*argv*/,
const private_member & /*unused*/) {}
Communicator::Communicator(const private_member & /*unused*/) {}
template <typename T>
void Communicator::sendImpl(const T * /*unused*/, Int /*unused*/,
Int /*unused*/, Int /*unused*/,
const CommunicationMode & /*unused*/) const {}
template <typename T>
void Communicator::receiveImpl(T * /*unused*/, Int /*unused*/, Int /*unused*/,
Int /*unused*/) const {}
template <typename T>
CommunicationRequest
Communicator::asyncSendImpl(const T * /*unused*/, Int /*unused*/,
Int /*unused*/, Int /*unused*/,
const CommunicationMode & /*unused*/) const {
return std::shared_ptr<InternalCommunicationRequest>(
new InternalCommunicationRequest(0, 0));
}
template <typename T>
CommunicationRequest
Communicator::asyncReceiveImpl(T * /*unused*/, Int /*unused*/, Int /*unused*/,
Int /*unused*/) const {
return std::shared_ptr<InternalCommunicationRequest>(
new InternalCommunicationRequest(0, 0));
}
template <typename T>
void Communicator::probe(Int /*unused*/, Int /*unused*/,
CommunicationStatus & /*unused*/) const {}
template <typename T>
bool Communicator::asyncProbe(Int /*unused*/, Int /*unused*/,
CommunicationStatus & /*unused*/) const {
return true;
}
bool Communicator::test(CommunicationRequest & /*unused*/) { return true; }
bool Communicator::testAll(std::vector<CommunicationRequest> & /*unused*/) {
return true;
}
void Communicator::wait(CommunicationRequest & /*unused*/) {}
void Communicator::waitAll(std::vector<CommunicationRequest> & /*unused*/) {}
UInt Communicator::waitAny(std::vector<CommunicationRequest> & /*unused*/) {
return UInt(-1);
}
void Communicator::barrier() const {}
CommunicationRequest Communicator::asyncBarrier() const {
return std::shared_ptr<InternalCommunicationRequest>(
new InternalCommunicationRequest(0, 0));
}
template <typename T>
void Communicator::reduceImpl(T * /*unused*/, int /*unused*/,
SynchronizerOperation /*unused*/,
int /*unused*/) const {}
template <typename T>
void Communicator::allReduceImpl(T * /*unused*/, int /*unused*/,
SynchronizerOperation /*unused*/) const {}
template <typename T>
void Communicator::scanImpl(T * values, T * result, int n,
SynchronizerOperation /*unused*/) const {
if (values == result) {
return;
}
std::copy_n(values, n, result);
}
template <typename T>
void Communicator::exclusiveScanImpl(T * /*values*/, T * result, int n,
SynchronizerOperation /*unused*/) const {
std::fill_n(result, n, T());
}
template <typename T>
inline void Communicator::allGatherImpl(T * /*unused*/, int /*unused*/) const {}
template <typename T>
inline void Communicator::allGatherVImpl(T * /*unused*/,
int * /*unused*/) const {}
template <typename T>
inline void Communicator::gatherImpl(T * /*unused*/, int /*unused*/,
int /*unused*/) const {}
template <typename T>
void Communicator::gatherImpl(T * values, int nb_values, T * gathered,
int /*unused*/) const {
static_assert(std::is_trivially_copyable<T>{},
"Cannot send this type of data");
std::memcpy(gathered, values, nb_values);
}
template <typename T>
inline void Communicator::gatherVImpl(T * /*unused*/, int * /*unused*/,
int /*unused*/) const {}
template <typename T>
inline void Communicator::broadcastImpl(T * /*unused*/, int /*unused*/,
int /*unused*/) const {}
int Communicator::getMaxTag() const { return std::numeric_limits<int>::max(); }
int Communicator::getMinTag() const { return 0; }
Int Communicator::getNbProc() const { return 1; }
Int Communicator::whoAmI() const { return 0; }
} // namespace akantu

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