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/* This file is part of Charon.
Charon 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.
Charon 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 Charon. If not, see <http://www.gnu.org/licenses/>.
*/
/** \file petsc4_PetscSharedLibLoad.cpp
* Load generated library with dlopen and execute the run function.
* \author <a href="Jens-Malte.Gottfried@iwr.uni-heidelberg.de">
* Jens-Malte Gottfried </a>
* \date 25.10.2010
*
* \test
* Check for some possible problems on ubuntu with built-in
* petsc implementation (hopefully not longer present with current versions):
* - loading and unloading libmpi.so.0 and using it's MPI_Init and MPI_Finalize
* - loading/unloading and using a self-compiled libpetsc4_lib.so which
* uses simple petsc calls, similar to petsc1_Init.cpp.
* \note
* This Unix-specific, so not available on Win platforms.
*/
#include <dlfcn.h>
#include <cassert>
#include <iostream>
#include <cstdlib>
/// test run
/** \param argc,argv Command line options passed to MPI and PETSc
* \returns zero in case of success
*/
int main(int argc, char** argv) {
std::cout << "opening libmpi.so.0" << std::endl;
void* handle = dlopen("libmpi.so.0", RTLD_LAZY | RTLD_GLOBAL);
if (!handle) {
std::cerr << dlerror() << std::endl;
return EXIT_FAILURE;
}
std::cout << "calling MPI_Init" << std::endl;
void* func = dlsym(handle, "MPI_Init");
if (!func) {
std::cerr << dlerror() << std::endl;
return EXIT_FAILURE;
}
int (*MPI_Init)(int*, char***);
*reinterpret_cast<void**>(&MPI_Init) = func;
MPI_Init(&argc,&argv);
std::cout << "calling MPI_Finalize" << std::endl;
func = dlsym(handle, "MPI_Finalize");
if (!func) {
std::cerr << dlerror() << std::endl;
return EXIT_FAILURE;
}
int (*MPI_Finalize)(void);
*reinterpret_cast<void**>(&MPI_Finalize) = func;
MPI_Finalize();
std::cout << "closing libmpi.so.0" << std::endl;
dlclose(handle);
#ifdef NDEBUG
std::string fName = "./libpetsc4_lib.so";
#else
std::string fName = "./libpetsc4_lib_d.so";
#endif
std::cout << "opening PetscTestDLL (" << fName << ")" << std::endl;
handle = dlopen(
fName.c_str(),
RTLD_LAZY | RTLD_GLOBAL);
if (!handle) {
std::cerr << dlerror() << std::endl;
return EXIT_FAILURE;
}
func = dlsym(handle, "run");
if (!func) {
std::cerr << dlerror() << std::endl;
return EXIT_FAILURE;
}
int (*run)(int&, char**&);
*reinterpret_cast<void**>(&run) = func;
run(argc, argv);
std::cout << "closing PetscTestDLL" << std::endl;
// some error occurs here (using ubuntu lucid)
// fixed in petsc 3.1 used in maverick -> upstream
dlclose(handle);
return EXIT_SUCCESS;
}
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