NullCommunicator.cpp

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//=======================================================================================
// ____          ____    __    ______     __________   __      __       __        __
// \    \       |    |  |  |  |   _   \  |___    ___| |  |    |  |     /  \      |  |
//  \    \      |    |  |  |  |  |_)   |     |  |     |  |    |  |    /    \     |  |
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//    \    \    |    |  |  |  |  | \  \      |  |     |   \__/   |  /  ____  \   |  |____
//     \    \   |    |  |__|  |__|  \__\     |__|      \________/  /__/    \__\  |_______|
//      \    \  |    |   ________________________________________________________________
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//            \ _____|  |__|        |________|   \_______/    |__|   |______/    (_______/
//
//  This file is part of VirtualFluids. VirtualFluids is free software: you can
//  redistribute it and/or modify it under the terms of the GNU General Public
//  License as published by the Free Software Foundation, either version 3 of
//  the License, or (at your option) any later version.
//
//  VirtualFluids 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 General Public License
//  for more details.
//
//  SPDX-License-Identifier: GPL-3.0-or-later
//  SPDX-FileCopyrightText: Copyright © VirtualFluids Project contributors, see AUTHORS.md in root folder
//
//=======================================================================================
 
#include "NullCommunicator.h"
 
#include <memory>
 
namespace vf::parallel
{
 
std::shared_ptr<Communicator> NullCommunicator::getInstance()
{
    std::lock_guard<std::mutex> myLock(instantiation_mutex);
    if (!instance) {
        instance = std::make_shared<NullCommunicator>();
    }
    return instance;
}
double NullCommunicator::Wtime() { return 0; }
int NullCommunicator::getBundleID() const { return 0; }
int NullCommunicator::getNumberOfBundles() const { return 0; }
int NullCommunicator::getProcessID() const { return 0; }
int NullCommunicator::getNumberOfProcesses() const { return 1; }
void *NullCommunicator::getNativeCommunicator() { return NULL; }
int NullCommunicator::getRoot() const { return 0; }
int NullCommunicator::getBundleRoot() const { return 0; }
int NullCommunicator::getProcessRoot() const { return 0; }
std::vector<std::string> NullCommunicator::gather(const std::string & /*str*/) { return {}; }
 
void NullCommunicator::sendSerializedObject(std::stringstream &stream, int target){}
void NullCommunicator::receiveSerializedObject(std::stringstream &stream, int source){}
 
int NullCommunicator::getProcessID(int bundle, int rank) const { return 0; }
bool NullCommunicator::isRoot() const { return true; }
 
int NullCommunicator::getNumberOfProcessesInBundle(int bundle) const {return 0; }
void NullCommunicator::barrier(){}
void NullCommunicator::abort(int errorcode){}
 
std::vector<int> NullCommunicator::gather(std::vector<int> &values) { return {}; }
std::vector<float> NullCommunicator::gather(std::vector<float> &values) { return {}; }
std::vector<double> NullCommunicator::gather(std::vector<double> &values) { return {}; }
std::vector<unsigned long long> NullCommunicator::gather(std::vector<unsigned long long> &values) { return {}; }
 
void NullCommunicator::allGather(std::vector<int> &svalues, std::vector<int> &rvalues){}
void NullCommunicator::allGather(std::vector<float> &svalues, std::vector<float> &rvalues){}
void NullCommunicator::allGather(std::vector<double> &svalues, std::vector<double> &rvalues){}
void NullCommunicator::allGather(std::vector<unsigned long long> &svalues, std::vector<unsigned long long> &rvalues){}
void NullCommunicator::allGather(std::vector<uint> &svalues, std::vector<uint> &rvalues){}
void NullCommunicator::allReduceSum(std::vector<float>& svalues) {}
void NullCommunicator::allReduceSum(std::vector<double>& svalues) {}
void NullCommunicator::allReduceSum(std::vector<uint>& svalues) {}
void NullCommunicator::broadcast(int &value){}
void NullCommunicator::broadcast(float &value){}
void NullCommunicator::broadcast(double &value){}
void NullCommunicator::broadcast(long int &value){}
void NullCommunicator::broadcast(std::vector<int> &values){}
void NullCommunicator::broadcast(std::vector<float> &values){}
void NullCommunicator::broadcast(std::vector<double> &values){}
void NullCommunicator::broadcast(std::vector<long int> &values){}
 
void NullCommunicator::receiveSend(uint *buffer_receive, int size_buffer_recv, int neighbor_rank_recv, const uint *buffer_send,
                                   int size_buffer_send, int neighbor_rank_send) const{}
 
void NullCommunicator::send(real *sbuf, int count_s, int nb_rank) const {};
double NullCommunicator::reduceSum(double /*quantityPerProcess*/) const { return 0.0; };
int NullCommunicator::mapCudaDevicesOnHosts(const std::vector<unsigned int> &devices, int numberOfDevices) const{ return 0; }
 
void NullCommunicator::receiveSend(real *buffer_send, int size_buffer_send, real *buffer_receive, int size_buffer_recv,
                                   int neighbor_rank) const{}
 
void NullCommunicator::receiveNonBlocking(real *rbuf, int count_r, int sourceRank){}
void NullCommunicator::sendNonBlocking(real *sbuf, int count_s, int destinationRank){}
 
void NullCommunicator::send(real *sbuf, int count_s, int destinationRank){}
 
void NullCommunicator::waitAll(){}
 
void NullCommunicator::resetRequests(){}
} // namespace vf::parallel