parallel/ThreadsafeScorers/ts_scorers.cc

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0025 //
0026 /// \file ts_scorers.cc
0027 /// \brief Main program of the parallel/ThreadsafeScorers example
0028 ///
0029 /// ts_scorers example shows how to use global scorers. The benefit of using
0030 ///     global scorers in memory-savings for problems with very large amounts
0031 ///     of scoring volumes. Additionally, the global scorers are more precise
0032 ///     w.r.t. the serial solution because of the lack of compounding
0033 ///     round-off error from multiple threads
0034 ///
0035 /// In this example, the global scorers are implemented as static member
0036 ///     variables in TSRun because TSRun is thread-local. The G4atomic
0037 ///     class is the core of the thread-safe scorers and can be uses
0038 //
0039 //
0040 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0041 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0042
0043 #include "G4RunManagerFactory.hh"
0044 #include "G4Threading.hh"
0045 #include "G4Types.hh"
0046 #include "Randomize.hh"
0047
0048 // User Defined Classes
0049 #include "TSActionInitialization.hh"
0050 #include "TSDetectorConstruction.hh"
0051 #include "TSPhysicsList.hh"
0052
0053 #include "G4Step.hh"
0054 #include "G4Track.hh"
0055 #include "G4UIExecutive.hh"
0056 #include "G4UImanager.hh"
0057 #include "G4VisExecutive.hh"
0058
0059 // for std::system(const char*)
0060 #include <cstdlib>
0061
0062 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0063
0064 void message(G4RunManager* runmanager)
0065 {
0066   G4MTRunManager* man = dynamic_cast<G4MTRunManager*>(runmanager);
0067   if (man) {
0068     man->SetNumberOfThreads(G4Threading::G4GetNumberOfCores());
0069     G4cout << "\n\n\t--> Running in multithreaded mode with " << man->GetNumberOfThreads()
0070            << " threads\n\n"
0071            << G4endl;
0072   }
0073   else {
0074     G4cout << "\n\n\t--> Running in serial mode\n\n" << G4endl;
0075   }
0076 }
0077
0078 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0079
0080 int main(int argc, char** argv)
0081 {
0082   G4String macro;
0083   if (argc > 1) macro = argv[argc - 1];
0084
0085   // Detect interactive mode (if no arguments) and define UI session
0086   //
0087   G4UIExecutive* ui = 0;
0088   if (macro.empty()) ui = new G4UIExecutive(argc, argv);
0089
0090   // Set the random seed
0091   CLHEP::HepRandom::setTheSeed(1245214UL);
0092
0093   G4RunManager* runmanager = G4RunManagerFactory::CreateRunManager(G4RunManagerType::Tasking);
0094
0095   message(runmanager);
0096
0097   runmanager->SetUserInitialization(new TSDetectorConstruction);
0098
0099   runmanager->SetUserInitialization(new TSPhysicsList);
0100
0101   runmanager->SetUserInitialization(new TSActionInitialization);
0102
0103   runmanager->Initialize();
0104
0105   // Initialize visualization
0106   //
0107   G4VisManager* visManager = new G4VisExecutive;
0108   // G4VisExecutive can take a verbosity argument - see /vis/verbose guidance.
0109   // G4VisManager* visManager = new G4VisExecutive("Quiet");
0110   visManager->Initialize();
0111
0112   // Get the pointer to the User Interface manager
0113   G4UImanager* UImanager = G4UImanager::GetUIpointer();
0114
0115   // Process macro or start UI session
0116   //
0117   if (!ui) {
0118     // batch mode
0119     G4String command = "/control/execute ";
0120     UImanager->ApplyCommand(command + macro);
0121   }
0122   else {
0123     ui->SessionStart();
0124   }
0125
0126   // Job termination
0127   // Free the store: user actions, physics_list and detector_description are
0128   // owned and deleted by the run manager, so they should not be deleted
0129   // in the main() program !
0130   delete visManager;
0131   delete runmanager;
0132
0133   return 0;
0134 }