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/*
Copyright 2020 Equinor ASA.
This file is part of the Open Porous Media project (OPM).
OPM is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
OPM 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with OPM. If not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <opm/models/parallel/mpiutil.hh>
#include <dune/common/parallel/mpihelper.hh>
#include <cassert>
#if HAVE_MPI
struct MPIError
{
MPIError(std::string s, int e) : errorstring(std::move(s)), errorcode(e){}
std::string errorstring;
int errorcode;
};
void MPI_err_handler(MPI_Comm*, int* err_code, ...)
{
std::vector<char> err_string(MPI_MAX_ERROR_STRING);
int err_length;
MPI_Error_string(*err_code, err_string.data(), &err_length);
std::string s(err_string.data(), err_length);
std::cerr << "An MPI Error ocurred:" << std::endl << s << std::endl;
throw MPIError(s, *err_code);
}
#endif
bool noStrings(int, int)
{
std::string empty;
auto res = Opm::gatherStrings(empty);
assert(res.empty());
return true;
}
bool oddRankStrings(int size, int rank)
{
std::string what = (rank % 2 == 1) ? "An error on rank " + std::to_string(rank) : std::string();
auto res = Opm::gatherStrings(what);
assert(int(res.size()) == size/2);
for (int i = 0; i < size/2; ++i) {
assert(res[i] == "An error on rank " + std::to_string(2*i + 1));
}
return true;
}
bool allRankStrings(int size, int rank)
{
std::string what = "An error on rank " + std::to_string(rank);
auto res = Opm::gatherStrings(what);
assert(int(res.size()) == size);
for (int i = 0; i < size; ++i) {
assert(res[i] == "An error on rank " + std::to_string(i));
}
return true;
}
int testMain(int size, int rank)
{
bool ok = noStrings(size, rank);
ok = ok && oddRankStrings(size, rank);
ok = ok && allRankStrings(size, rank);
if (ok) {
return EXIT_SUCCESS;
} else {
return EXIT_FAILURE;
}
}
int main(int argc, char** argv)
{
const auto& mpiHelper = Dune::MPIHelper::instance(argc, argv);
int mpiSize = mpiHelper.size();
int mpiRank = mpiHelper.rank();
#if HAVE_MPI
// register a throwing error handler to allow for
// debugging with "catch throw" in gdb
MPI_Errhandler handler;
MPI_Comm_create_errhandler(MPI_err_handler, &handler);
MPI_Comm_set_errhandler(MPI_COMM_WORLD, handler);
#endif
return testMain(mpiSize, mpiRank);
}
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