ESPResSo
Extensible Simulation Package for Research on Soft Matter Systems
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walberla_init.cpp
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1/*
2 * Copyright (C) 2019-2023 The ESPResSo project
3 *
4 * This file is part of ESPResSo.
5 *
6 * ESPResSo is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
10 *
11 * ESPResSo is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 */
19
22
23#include <core/mpi/Environment.h>
24#include <core/mpi/MPIManager.h>
25
26#include <cassert>
27#include <memory>
28
29/** @brief waLBerla MPI communicator. */
30static std::shared_ptr<walberla::mpi::MPIManager> walberla_mpi_comm;
31/** @brief waLBerla MPI environment (destructor depends on the communicator). */
32static std::shared_ptr<walberla::mpi::Environment> walberla_mpi_env;
33
34namespace walberla {
35
36void mpi_init() {
37 assert(::walberla_mpi_env == nullptr);
38 assert(::walberla_mpi_comm == nullptr);
39 int argc = 0;
40 char **argv = nullptr;
41 ::walberla_mpi_env = std::make_shared<walberla::mpi::Environment>(argc, argv);
42 ::walberla_mpi_comm = walberla::MPIManager::instance();
43}
44
45std::unique_ptr<ResourceManager> get_vtk_dependent_resources() {
46 auto vtk_dependencies = std::make_unique<ResourceManager>();
47 // waLBerla MPI communicator (singleton)
48 vtk_dependencies->acquire_lock(::walberla_mpi_comm);
49 // waLBerla MPI environment (destructor depends on the MPI communicator)
50 vtk_dependencies->acquire_lock(::walberla_mpi_env);
51 return vtk_dependencies;
52}
53
54} // namespace walberla
\file PackInfoPdfDoublePrecision.cpp \author pystencils
std::unique_ptr< ResourceManager > get_vtk_dependent_resources()
Get a lock on waLBerla's global resources for VTK.
void mpi_init()
Initialize waLBerla's MPI manager.
static std::shared_ptr< walberla::mpi::MPIManager > walberla_mpi_comm
waLBerla MPI communicator.
static std::shared_ptr< walberla::mpi::Environment > walberla_mpi_env
waLBerla MPI environment (destructor depends on the communicator).