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Fri, May 31, 11:35
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rTAMAAS tamaas
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 "fftw_interface.hh"
#include "fftw_mpi_interface.hh"
#include "logger.hh"
#include "mpi_interface.hh"
#if TAMAAS_BACKEND == TAMAAS_BACKEND_OMP
#include <omp.h>
#endif
/* -------------------------------------------------------------------------- */
namespace
tamaas
{
void
initialize
(
UInt
num_threads
)
{
static
bool
has_warned
=
false
;
mpi
::
thread
provided
=
mpi
::
thread
::
single
;
if
(
not
mpi
::
initialized
())
mpi
::
init_thread
(
nullptr
,
nullptr
,
mpi
::
thread
::
single
,
&
provided
);
bool
should_init_threads
=
(
provided
>
mpi
::
thread
::
single
);
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
(
should_init_threads
and
(
not
fftw
::
init_threads
()))
{
TAMAAS_EXCEPTION
(
"FFTW could not initialize threads!"
);
}
#endif
if
(
mpi
::
initialized
())
{
if
(
not
has_warned
)
{
Logger
().
get
(
LogLevel
::
warning
)
<<
"WARNING: experimental MPI support
\n
"
;
has_warned
=
true
;
}
fftw
::
mpi
::
init
();
}
if
(
should_init_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
}
}
/* -------------------------------------------------------------------------- */
void
finalize
()
{
if
(
not
mpi
::
finalized
())
{
#if TAMAAS_BACKEND != TAMAAS_BACKEND_CPP
fftw
::
cleanup_threads
();
#endif
fftw
::
mpi
::
cleanup
();
mpi
::
finalize
();
}
}
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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