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Wed, Dec 11, 20:12

mpi_communicator_data.hh
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/**
* @file mpi_communicator_data.hh
*
* @author Guillaume Anciaux <guillaume.anciaux@epfl.ch>
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date creation: Mon Jun 14 2010
* @date last modification: Tue Jun 16 2020
*
* @brief Wrapper on MPI types to have a better separation between libraries
*
*
* @section LICENSE
*
* Copyright (©) 2010-2021 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* Akantu is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free
* Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* Akantu 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 Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Akantu. If not, see <http://www.gnu.org/licenses/>.
*
*/
/* -------------------------------------------------------------------------- */
#if defined(__INTEL_COMPILER)
//#pragma warning ( disable : 383 )
#elif defined(__clang__) // test clang to be sure that when we test for gnu it
// is only gnu
#elif (defined(__GNUC__) || defined(__GNUG__))
#if __cplusplus > 199711L
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wliteral-suffix"
#endif
#endif
#include <mpi.h>
#if defined(__INTEL_COMPILER)
//#pragma warning ( disable : 383 )
#elif defined(__clang__) // test clang to be sure that when we test for gnu it
// is only gnu
#elif (defined(__GNUC__) || defined(__GNUG__))
#if __cplusplus > 199711L
#pragma GCC diagnostic pop
#endif
#endif
/* -------------------------------------------------------------------------- */
#include "communicator.hh"
/* -------------------------------------------------------------------------- */
#include <unordered_map>
/* -------------------------------------------------------------------------- */
#ifndef AKANTU_MPI_TYPE_WRAPPER_HH_
#define AKANTU_MPI_TYPE_WRAPPER_HH_
namespace akantu {
class MPICommunicatorData : public CommunicatorInternalData {
public:
MPICommunicatorData() {
MPI_Initialized(&is_externaly_initialized);
if (is_externaly_initialized == 0) {
MPI_Init(nullptr, nullptr); // valid according to the spec
}
MPI_Comm_create_errhandler(MPICommunicatorData::errorHandler,
&error_handler);
MPI_Comm_set_errhandler(MPI_COMM_WORLD, error_handler);
setMPICommunicator(MPI_COMM_WORLD);
}
~MPICommunicatorData() override {
if (is_externaly_initialized == 0) {
MPI_Comm_set_errhandler(communicator, save_error_handler);
MPI_Errhandler_free(&error_handler);
MPI_Finalize();
}
}
inline void setMPICommunicator(MPI_Comm comm) {
MPI_Comm_set_errhandler(communicator, save_error_handler);
communicator = comm;
MPI_Comm_get_errhandler(comm, &save_error_handler);
MPI_Comm_set_errhandler(comm, error_handler);
}
inline int rank() const {
int prank;
MPI_Comm_rank(communicator, &prank);
return prank;
}
inline int size() const {
int psize;
MPI_Comm_size(communicator, &psize);
return psize;
}
inline MPI_Comm getMPICommunicator() const { return communicator; }
static int getMaxTag() {
int flag;
int * value;
// not defined on derived intra-communicator
MPI_Comm_get_attr(MPI_COMM_WORLD, MPI_TAG_UB, &value, &flag);
AKANTU_DEBUG_ASSERT(flag, "No attribute MPI_TAG_UB.");
return *value;
}
private:
MPI_Comm communicator{MPI_COMM_WORLD};
MPI_Errhandler save_error_handler{MPI_ERRORS_ARE_FATAL};
static int is_externaly_initialized;
/* ------------------------------------------------------------------------ */
MPI_Errhandler error_handler;
static void
errorHandler(MPI_Comm * /*comm*/,
int * error_code, // NOLINT(readability-non-const-parameter)
...) {
char error_string[MPI_MAX_ERROR_STRING];
int str_len;
MPI_Error_string(*error_code, error_string, &str_len);
AKANTU_CUSTOM_EXCEPTION_INFO(debug::CommunicationException(),
"MPI failed with the error code "
<< *error_code << ": \"" << error_string
<< "\"");
}
};
} // namespace akantu
#endif /* AKANTU_MPI_TYPE_WRAPPER_HH_ */

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