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tamaas/src/core/tamaas.cpp
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tamaas.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 "tamaas.hh"
#include "loop.hh"
#include <fftw3.h>
#if TAMAAS_BACKEND == TAMAAS_BACKEND_OMP
#include <omp.h>
#endif
/* -------------------------------------------------------------------------- */
namespace tamaas {
void initialize(UInt num_threads) {
if (num_threads) {
#if TAMAAS_BACKEND == TAMAAS_BACKEND_OMP
omp_set_num_threads(num_threads); // set user-defined number of threads
#endif
} else {
num_threads = 1;
}
#if TAMAAS_BACKEND != TAMAAS_BACKEND_CPP
if (not fftw_init_threads())
TAMAAS_EXCEPTION("FFTW could not initialize threads!");
#if TAMAAS_BACKEND == TAMAAS_BACKEND_OMP
fftw_plan_with_nthreads(omp_get_max_threads());
#elif TAMAAS_BACKEND == TAMAAS_BACKEND_TBB
fftw_plan_with_nthreads(num_threads);
#endif
#endif
}
/* -------------------------------------------------------------------------- */
void finalize() {
#if TAMAAS_BACKEND != TAMAAS_BACKEND_CPP
fftw_cleanup_threads();
#endif
}
namespace {
/// Manager for initialize + finalize
struct entry_exit_points {
entry_exit_points() { initialize(); }
~entry_exit_points() { finalize(); }
static const entry_exit_points singleton;
};
const entry_exit_points entry_exit_points::singleton;
} // namespace
} // namespace tamaas
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