// Copyright CERN and copyright holders of ALICE O2. This software is

// distributed under the terms of the GNU General Public License v3 (GPL

// Version 3), copied verbatim in the file "COPYING".

//

// See http://alice-o2.web.cern.ch/license for full licensing information.

//

// In applying this license CERN does not waive the privileges and immunities

// granted to it by virtue of its status as an Intergovernmental Organization

// or submit itself to any jurisdiction.

#include <cstring>

#include "SimSetup/SimSetup.h"

#include "FairLogger.h"

#include "SetCuts.h"

#include <dlfcn.h>

#ifdef NDEBUG

#undef NDEBUG

#endif

#include <cassert>

#include <sstream>

namespace o2

{

typedef void (*setup_fnc)();

void setupFromPlugin(const char* libname, const char* setupfuncname)

{

LOG(INFO) << "Loading simulation plugin " << libname;

auto libHandle = dlopen(libname, RTLD_NOW);

// try to make the library loading a bit more portable:

if (!libHandle) {

// try appending *.so

std::stringstream stream;

stream << libname << ".so";

libHandle = dlopen(stream.str().c_str(), RTLD_NOW);

}

if (!libHandle) {

// try appending *.dylib

std::stringstream stream;

stream << libname << ".dylib";

libHandle = dlopen(stream.str().c_str(), RTLD_NOW);

}

assert(libHandle);

auto setup = (setup_fnc)dlsym(libHandle, setupfuncname);

assert(setup);

setup();

}

void SimSetup::setup(const char* engine)

{

if (strcmp(engine, "TGeant3") == 0) {

setupFromPlugin("libO2G3Setup", "_ZN2o28g3config8G3ConfigEv");

} else if (strcmp(engine, "TGeant4") == 0) {

setupFromPlugin("libO2G4Setup", "_ZN2o28g4config8G4ConfigEv");

} else if (strcmp(engine, "TFluka") == 0) {

setupFromPlugin("libO2FLUKASetup", "_ZN2o211flukaconfig11FlukaConfigEv");

} else {

LOG(FATAL) << "Unsupported engine " << engine;

}

o2::SetCuts();

}

} // namespace o2