fft_engine.cpp
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	/**
	* @file
	* @section LICENSE
	*
	* Copyright (©) 2016-2020 EPFL (École Polytechnique Fédérale de Lausanne),
	* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
	*
	* This program is free software: you can redistribute it and/or modify
	* it under the terms of the GNU Affero General Public License as published
	* by the Free Software Foundation, either version 3 of the License, or
	* (at your option) any later version.
	*
	* This program 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 Affero General Public License for more details.
	*
	* You should have received a copy of the GNU Affero General Public License
	* along with this program. If not, see <https://www.gnu.org/licenses/>.
	*
	*/
	/* -------------------------------------------------------------------------- */
	#include "fft_engine.hh"
	#include "fftw_engine.hh"
	#include "fftw_mpi_engine.hh"
	#include "mpi_interface.hh"
	/* -------------------------------------------------------------------------- */
	namespace tamaas {

	std::unique_ptr<FFTEngine> FFTEngine::makeEngine(unsigned int flags) {
	#ifdef USE_MPI
	if (mpi::size() != 1)
	return std::make_unique<FFTWMPIEngine>(flags);
	else
	return std::make_unique<FFTWEngine>(flags);
	#else
	return std::make_unique<FFTWEngine>(flags);
	#endif
	}

	} // namespace tamaas