G4MTRunManager.cc

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#include "G4MTRunManager.hh"
#include "G4AutoLock.hh"
#include "G4MTRunManagerKernel.hh"
#include "G4ProductionCutsTable.hh"
#include "G4Run.hh"
#include "G4ScoringManager.hh"
#include "G4StateManager.hh"
#include "G4TiMemory.hh"
#include "G4Timer.hh"
#include "G4TransportationManager.hh"
#include "G4UImanager.hh"
#include "G4UserRunAction.hh"
#include "G4UserWorkerInitialization.hh"
#include "G4UserWorkerThreadInitialization.hh"
#include "G4VUserActionInitialization.hh"
#include "G4WorkerRunManager.hh"
#include "G4WorkerThread.hh"
 
G4ScoringManager* G4MTRunManager::masterScM = 0;
G4MTRunManager::masterWorlds_t G4MTRunManager::masterWorlds =
  G4MTRunManager::masterWorlds_t();
G4MTRunManager* G4MTRunManager::fMasterRM      = 0;
G4int G4MTRunManager::seedOncePerCommunication = 0;
G4ThreadId G4MTRunManager::masterThreadId      = G4ThisThread::get_id();
 
namespace
{
  G4Mutex cmdHandlingMutex  = G4MUTEX_INITIALIZER;
  G4Mutex scorerMergerMutex = G4MUTEX_INITIALIZER;
  G4Mutex runMergerMutex    = G4MUTEX_INITIALIZER;
  G4Mutex setUpEventMutex   = G4MUTEX_INITIALIZER;
}  // namespace
 
G4MTRunManager* G4MTRunManager::GetMasterRunManager()
{
  ////////#ifdef G4MULTITHREADED
  return fMasterRM;
  ////////#else
  ////////    return G4RunManager::GetRunManager();
  ////////#endif
}
 
G4RunManagerKernel* G4MTRunManager::GetMasterRunManagerKernel()
{
  return fMasterRM->kernel;
}
 
G4MTRunManagerKernel* G4MTRunManager::GetMTMasterRunManagerKernel()
{
  return fMasterRM->MTkernel;
}
G4ScoringManager* G4MTRunManager::GetMasterScoringManager()
{
  return masterScM;
}
 
G4MTRunManager::masterWorlds_t& G4MTRunManager::GetMasterWorlds()
{
  return masterWorlds;
}
void G4MTRunManager::addWorld(G4int counter, G4VPhysicalVolume* w)
{
  masterWorlds.insert(std::make_pair(counter, w));
}
G4ThreadId G4MTRunManager::GetMasterThreadId() { 
    return masterThreadId; 
}
G4int G4MTRunManager::SeedOncePerCommunication()
{
  return seedOncePerCommunication;
}
void G4MTRunManager::SetSeedOncePerCommunication(G4int val)
{
  seedOncePerCommunication = val;
}
 
G4MTRunManager::G4MTRunManager()
  : G4RunManager(masterRM)
  , nworkers(2)
  , forcedNwokers(-1)
  , pinAffinity(0)
  , masterRNGEngine(0)
  , nextActionRequest(WorkerActionRequest::UNDEFINED)
  , eventModuloDef(0)
  , eventModulo(1)
  , nSeedsUsed(0)
  , nSeedsFilled(0)
  , nSeedsMax(10000)
  , nSeedsPerEvent(2)
{
  if(fMasterRM)
  {
    G4Exception("G4MTRunManager::G4MTRunManager", "Run0110", FatalException,
                "Another instance of a G4MTRunManager already exists.");
  }
  fMasterRM      = this;
  masterThreadId = G4ThisThread::get_id();
  MTkernel       = static_cast<G4MTRunManagerKernel*>(kernel);
#ifndef G4MULTITHREADED
  G4ExceptionDescription msg;
  msg << "Geant4 code is compiled without multi-threading support"
      << "(-DG4MULTITHREADED is set to off).\n";
  msg << "G4MTRunManager can only be used in multi-threaded applications.";
  G4Exception("G4MTRunManager::G4MTRunManager", "Run0111", FatalException, msg);
#endif
 
  G4int numberOfStaticAllocators = kernel->GetNumberOfStaticAllocators();
  if(numberOfStaticAllocators > 0)
  {
    G4ExceptionDescription msg1;
    msg1 << "There are " << numberOfStaticAllocators
         << " static G4Allocator objects detected.\n"
         << "In multi-threaded mode, all G4Allocator objects must be dynamically "
            "instantiated.";
    G4Exception("G4MTRunManager::G4MTRunManager", "Run1035", FatalException,
                msg1);
  }
  G4UImanager::GetUIpointer()->SetMasterUIManager(true);
  masterScM = G4ScoringManager::GetScoringManagerIfExist();
 
  // Check if a default RandomNumberGenerator has been created by user,
  // if not create default one
  // Note this call forces creation of defaults if not already there
  // G4Random::getTheEngine(); //User did not specify RNG, create defaults
  // Now remember the master instance of the RNG Engine
  masterRNGEngine = G4Random::getTheEngine();
 
  numberOfEventToBeProcessed = 0;
  randDbl                    = new double[nSeedsPerEvent * nSeedsMax];
 
  char* env = std::getenv("G4FORCENUMBEROFTHREADS");
  if(env)
  {
    G4String envS = env;
    if(envS == "MAX" || envS == "max")
    {
      forcedNwokers = G4Threading::G4GetNumberOfCores();
    }
    else
    {
      std::istringstream is(env);
      G4int val = -1;
      is >> val;
      if(val > 0)
      {
        forcedNwokers = val;
      }
      else
      {
        G4ExceptionDescription msg2;
        msg2 << "Environment variable G4FORCENUMBEROFTHREADS has an invalid "
                "value <"
             << envS << ">. It has to be an integer or a word \"max\".\n"
             << "G4FORCENUMBEROFTHREADS is ignored.";
        G4Exception("G4MTRunManager::G4MTRunManager", "Run1039", JustWarning,
                    msg2);
      }
    }
    if(forcedNwokers > 0)
    {
      nworkers = forcedNwokers;
      G4cout << "### Number of threads is forced to " << forcedNwokers
             << " by Environment variable G4FORCENUMBEROFTHREADS." << G4endl;
    }
  }
}
 
G4MTRunManager::~G4MTRunManager()
{
  // TODO: Currently does not work due to concurrent deletion of something
  //      that is shared:
  // G4ProcessTable::DeleteMessenger from ~G4RunManager
  // G4cout<<"Destroy MTRunManager"<<G4endl;//ANDREA
  TerminateWorkers();
  delete[] randDbl;
}
 
void G4MTRunManager::StoreRNGStatus(const G4String& fn)
{
  std::ostringstream os;
  os << randomNumberStatusDir << "G4Master_" << fn << ".rndm";
  G4Random::saveEngineStatus(os.str().c_str());
}
 
void G4MTRunManager::rndmSaveThisRun()
{
  G4int runNumber = 0;
  if(currentRun) runNumber = currentRun->GetRunID();
  if(!storeRandomNumberStatus)
  {
    G4cerr << "Warning from G4RunManager::rndmSaveThisRun():"
           << " Random number status was not stored prior to this run."
           << G4endl << "/random/setSavingFlag command must be issued. "
           << "Command ignored." << G4endl;
    return;
  }
 
  G4String fileIn = randomNumberStatusDir + "G4Worker_currentRun.rndm";
 
  std::ostringstream os;
  os << "run" << runNumber << ".rndm" << '\0';
  G4String fileOut = randomNumberStatusDir + os.str();
 
#ifdef WIN32
  G4String copCmd = "/control/shell copy " + fileIn + " " + fileOut;
#else
  G4String copCmd = "/control/shell cp " + fileIn + " " + fileOut;
#endif
  G4UImanager::GetUIpointer()->ApplyCommand(copCmd);
  if(verboseLevel > 0)
  { G4cout << fileIn << " is copied to " << fileOut << G4endl; }
}
 
void G4MTRunManager::rndmSaveThisEvent()
{
  G4Exception("G4MTRunManager::rndmSaveThisEvent","RUN_RNDM001",
    FatalException,"This method shall not be invoked !!");
}
 
void G4MTRunManager::SetNumberOfThreads(G4int n)
{
  if(threads.size() != 0)
  {
    G4ExceptionDescription msg;
    msg << "Number of threads cannot be changed at this moment \n"
        << "(old threads are still alive). Method ignored.";
    G4Exception("G4MTRunManager::SetNumberOfThreads(G4int)", "Run0112",
                JustWarning, msg);
  }
  else if(forcedNwokers > 0)
  {
    G4ExceptionDescription msg;
    msg << "Number of threads is forced to " << forcedNwokers
        << " by G4FORCENUMBEROFTHREADS shell variable.\n"
        << "Method ignored.";
    G4Exception("G4MTRunManager::SetNumberOfThreads(G4int)", "Run0113",
                JustWarning, msg);
  }
  else
  {
    nworkers = n;
  }
}
 
void G4MTRunManager::Initialize()
{
  G4RunManager::Initialize();
 
  // make sure all worker threads are set up.
  BeamOn(0);
  SetRunIDCounter(0);
  /// G4UImanager::GetUIpointer()->SetIgnoreCmdNotFound(true);
}
 
////void G4MTRunManager::TerminateEventLoop()
////{
////    //Nothing to do
////}
void G4MTRunManager::ProcessOneEvent(G4int)
{
  // Nothing to do
}
void G4MTRunManager::TerminateOneEvent()
{
  // Nothing to do
}
 
void G4MTRunManager::PrepareCommandsStack()
{
  G4AutoLock l(&cmdHandlingMutex);
  uiCmdsForWorkers.clear();
  std::vector<G4String>* cmdCopy =
    G4UImanager::GetUIpointer()->GetCommandStack();
  for(std::vector<G4String>::const_iterator it = cmdCopy->begin();
      it != cmdCopy->end(); ++it)
    uiCmdsForWorkers.push_back(*it);
  cmdCopy->clear();
  delete cmdCopy;
}
 
std::vector<G4String> G4MTRunManager::GetCommandStack()
{
  G4AutoLock l(&cmdHandlingMutex);
  return uiCmdsForWorkers;
}
 
void G4MTRunManager::CreateAndStartWorkers()
{
  // Now loop on requested number of workers
  // This will also start the workers
  // Currently we do not allow to change the
  // number of threads: threads area created once
  if(threads.size() == 0)
  {
    {
      // for consistency with G4TaskRunManager
      std::stringstream msg;
      msg << "--> G4MTRunManager::CreateAndStartWorkers() --> "
          << "Initializing workers...";
 
      std::stringstream ss;
      ss.fill('=');
      ss << std::setw(msg.str().length()) << "";
      G4cout << "\n"
             << ss.str() << "\n"
             << msg.str() << "\n"
             << ss.str() << "\n"
             << G4endl;
    }
 
    for(G4int nw = 0; nw < nworkers; ++nw)
    {
      // Create a new worker and remember it
      G4WorkerThread* context = new G4WorkerThread;
      context->SetNumberThreads(nworkers);
      context->SetThreadId(nw);
      G4Thread* thread =
        userWorkerThreadInitialization->CreateAndStartWorker(context);
      threads.push_back(thread);
    }
  }
  // Signal to threads they can start a new run
  NewActionRequest(WorkerActionRequest::NEXTITERATION);
}
 
void G4MTRunManager::InitializeEventLoop(G4int n_event, const char* macroFile,
                                         G4int n_select)
{
  MTkernel->SetUpDecayChannels();
  numberOfEventToBeProcessed = n_event;
  numberOfEventProcessed     = 0;
 
  if(!fakeRun)
  {
    nSeedsUsed   = 0;
    nSeedsFilled = 0;
 
    if(verboseLevel > 0)
    {
      timer->Start();
    }
 
    n_select_msg = n_select;
    if(macroFile != 0)
    {
      if(n_select_msg < 0)
        n_select_msg = n_event;
      msgText = "/control/execute ";
      msgText += macroFile;
      selectMacro = macroFile;
    }
    else
    {
      n_select_msg = -1;
      selectMacro  = "";
    }
 
    // initialize seeds
    // If user did not implement InitializeSeeds,
    // use default: nSeedsPerEvent seeds per event
    if(eventModuloDef > 0)
    {
      eventModulo = eventModuloDef;
      if(eventModulo > numberOfEventToBeProcessed / nworkers)
      {
        eventModulo = numberOfEventToBeProcessed / nworkers;
        if(eventModulo < 1)
          eventModulo = 1;
        G4ExceptionDescription msgd;
        msgd << "Event modulo is reduced to " << eventModulo
             << " to distribute events to all threads.";
        G4Exception("G4MTRunManager::InitializeEventLoop()", "Run10035",
                    JustWarning, msgd);
      }
    }
    else
    {
      eventModulo =
        int(std::sqrt(double(numberOfEventToBeProcessed / nworkers)));
      if(eventModulo < 1)
        eventModulo = 1;
    }
    if(InitializeSeeds(n_event) == false && n_event > 0)
    {
      G4RNGHelper* helper = G4RNGHelper::GetInstance();
      switch(seedOncePerCommunication)
      {
        case 0:
          nSeedsFilled = n_event;
          break;
        case 1:
          nSeedsFilled = nworkers;
          break;
        case 2:
          nSeedsFilled = n_event / eventModulo + 1;
          break;
        default:
          G4ExceptionDescription msgd;
          msgd << "Parameter value <" << seedOncePerCommunication
               << "> of seedOncePerCommunication is invalid. It is reset to 0.";
          G4Exception("G4MTRunManager::InitializeEventLoop()", "Run10036",
                      JustWarning, msgd);
          seedOncePerCommunication = 0;
          nSeedsFilled             = n_event;
      }
 
      // Generates up to nSeedsMax seed pairs only.
      if(nSeedsFilled > nSeedsMax)
        nSeedsFilled = nSeedsMax;
      masterRNGEngine->flatArray(nSeedsPerEvent * nSeedsFilled, randDbl);
      helper->Fill(randDbl, nSeedsFilled, n_event, nSeedsPerEvent);
    }
  }
 
  // Now initialize workers. Check if user defined a WorkerThreadInitialization
  if(userWorkerThreadInitialization == 0)
  {
    userWorkerThreadInitialization = new G4UserWorkerThreadInitialization();
  }
 
  // Prepare UI commands for threads
  PrepareCommandsStack();
 
  // Start worker threads
  CreateAndStartWorkers();
 
  // We need a barrier here. Wait for workers to start event loop.
  // This will return only when all workers have started processing events.
  WaitForReadyWorkers();
}
 
void G4MTRunManager::RefillSeeds()
{
  G4RNGHelper* helper = G4RNGHelper::GetInstance();
  G4int nFill         = 0;
  switch(seedOncePerCommunication)
  {
    case 0:
      nFill = numberOfEventToBeProcessed - nSeedsFilled;
      break;
    case 1:
      nFill = nworkers - nSeedsFilled;
      break;
    case 2:
    default:
      nFill = (numberOfEventToBeProcessed - nSeedsFilled * eventModulo) /
                eventModulo +
              1;
  }
  // Generates up to nSeedsMax seed pairs only.
  if(nFill > nSeedsMax)
    nFill = nSeedsMax;
  masterRNGEngine->flatArray(nSeedsPerEvent * nFill, randDbl);
  helper->Refill(randDbl, nFill);
  nSeedsFilled += nFill;
  // G4cout<<"helper->Refill() for "<<nFill<<" events."<<G4endl;
}
 
void G4MTRunManager::RunTermination()
{
  // Wait for all worker threads to have finished the run
  // i.e. wait for them to return from RunTermination()
  // This guarantee that userrunaction for workers has been called
 
  // Wait now for all threads to finish event-loop
  WaitForEndEventLoopWorkers();
  // Now call base-class methof
  G4RunManager::TerminateEventLoop();
  G4RunManager::RunTermination();
}
 
void G4MTRunManager::ConstructScoringWorlds()
{
  masterScM = G4ScoringManager::GetScoringManagerIfExist();
  // Call base class stuff...
  G4RunManager::ConstructScoringWorlds();
 
  masterWorlds.clear();
  size_t nWorlds =
    G4TransportationManager::GetTransportationManager()->GetNoWorlds();
  std::vector<G4VPhysicalVolume*>::iterator itrW =
    G4TransportationManager::GetTransportationManager()->GetWorldsIterator();
  for(size_t iWorld = 0; iWorld < nWorlds; iWorld++)
  {
    addWorld(iWorld, *itrW);
    itrW++;
  }
}
 
void G4MTRunManager::SetUserInitialization(G4UserWorkerInitialization* userInit)
{
  userWorkerInitialization = userInit;
}
 
void G4MTRunManager::SetUserInitialization(
  G4UserWorkerThreadInitialization* userInit)
{
  userWorkerThreadInitialization = userInit;
}
 
void G4MTRunManager::SetUserInitialization(
  G4VUserActionInitialization* userInit)
{
  userActionInitialization = userInit;
  userActionInitialization->BuildForMaster();
}
 
void G4MTRunManager::SetUserInitialization(G4VUserPhysicsList* userPL)
{
  G4RunManager::SetUserInitialization(userPL);
  // Needed for MT, to be moved in kernel
}
 
void G4MTRunManager::SetUserInitialization(G4VUserDetectorConstruction* userDC)
{
  G4RunManager::SetUserInitialization(userDC);
}
 
void G4MTRunManager::SetUserAction(G4UserRunAction* userAction)
{
  G4RunManager::SetUserAction(userAction);
  if(userAction)
    userAction->SetMaster();
}
 
void G4MTRunManager::SetUserAction(
  G4VUserPrimaryGeneratorAction* /*userAction*/)
{
  G4Exception(
    "G4MTRunManager::SetUserAction()", "Run0123", FatalException,
    "For multi-threaded version, define G4VUserPrimaryGeneratorAction in "
    "G4VUserActionInitialization.");
}
 
void G4MTRunManager::SetUserAction(G4UserEventAction* /*userAction*/)
{
  G4Exception("G4MTRunManager::SetUserAction()", "Run0124", FatalException,
              "For multi-threaded version, define G4UserEventAction in "
              "G4VUserActionInitialization.");
}
 
void G4MTRunManager::SetUserAction(G4UserStackingAction* /*userAction*/)
{
  G4Exception("G4MTRunManager::SetUserAction()", "Run0125", FatalException,
              "For multi-threaded version, define G4UserStackingAction in "
              "G4VUserActionInitialization.");
}
 
void G4MTRunManager::SetUserAction(G4UserTrackingAction* /*userAction*/)
{
  G4Exception("G4MTRunManager::SetUserAction()", "Run0126", FatalException,
              "For multi-threaded version, define G4UserTrackingAction in "
              "G4VUserActionInitialization.");
}
 
void G4MTRunManager::SetUserAction(G4UserSteppingAction* /*userAction*/)
{
  G4Exception("G4MTRunManager::SetUserAction()", "Run0127", FatalException,
              "For multi-threaded version, define G4UserSteppingAction in "
              "G4VUserActionInitialization.");
}
 
void G4MTRunManager::MergeScores(const G4ScoringManager* localScoringManager)
{
  G4AutoLock l(&scorerMergerMutex);
  if(masterScM && localScoringManager)
    masterScM->Merge(localScoringManager);
}
 
void G4MTRunManager::MergeRun(const G4Run* localRun)
{
  G4AutoLock l(&runMergerMutex);
  if(currentRun && localRun)
    currentRun->Merge(localRun);
}
 
G4bool G4MTRunManager::SetUpAnEvent(G4Event* evt, long& s1, long& s2, long& s3,
                                    G4bool reseedRequired)
{
  G4AutoLock l(&setUpEventMutex);
  if(numberOfEventProcessed < numberOfEventToBeProcessed)
  {
    evt->SetEventID(numberOfEventProcessed);
    if(reseedRequired)
    {
      G4RNGHelper* helper = G4RNGHelper::GetInstance();
      G4int idx_rndm      = nSeedsPerEvent * nSeedsUsed;
      s1                  = helper->GetSeed(idx_rndm);
      s2                  = helper->GetSeed(idx_rndm + 1);
      if(nSeedsPerEvent == 3)
        s3 = helper->GetSeed(idx_rndm + 2);
      nSeedsUsed++;
      if(nSeedsUsed == nSeedsFilled)
        RefillSeeds();
    }
    numberOfEventProcessed++;
    return true;
  }
  return false;
}
 
G4int G4MTRunManager::SetUpNEvents(G4Event* evt, G4SeedsQueue* seedsQueue,
                                   G4bool reseedRequired)
{
  G4AutoLock l(&setUpEventMutex);
  if(numberOfEventProcessed < numberOfEventToBeProcessed && !runAborted)
  {
    G4int nev = eventModulo;
    if(numberOfEventProcessed + nev > numberOfEventToBeProcessed)
    {
      nev = numberOfEventToBeProcessed - numberOfEventProcessed;
    }
    evt->SetEventID(numberOfEventProcessed);
    if(reseedRequired)
    {
      G4RNGHelper* helper = G4RNGHelper::GetInstance();
      G4int nevRnd        = nev;
      if(seedOncePerCommunication > 0)
        nevRnd = 1;
      for(int i = 0; i < nevRnd; i++)
      {
        seedsQueue->push(helper->GetSeed(nSeedsPerEvent * nSeedsUsed));
        seedsQueue->push(helper->GetSeed(nSeedsPerEvent * nSeedsUsed + 1));
        if(nSeedsPerEvent == 3)
          seedsQueue->push(helper->GetSeed(nSeedsPerEvent * nSeedsUsed + 2));
        nSeedsUsed++;
        if(nSeedsUsed == nSeedsFilled)
          RefillSeeds();
      }
    }
    numberOfEventProcessed += nev;
    return nev;
  }
  return 0;
}
 
void G4MTRunManager::TerminateWorkers()
{
  // Force workers to execute (if any) all UI commands left in the stack
  RequestWorkersProcessCommandsStack();
  // Ask workers to exit
  NewActionRequest(WorkerActionRequest::ENDWORKER);
  // finalize profiler before shutting down the threads
  G4Profiler::Finalize();
  // Now join threads.
#ifdef G4MULTITHREADED  // protect here to prevent warning in compilation
  while(!threads.empty())
  {
    G4Thread* t = *(threads.begin());
    threads.pop_front();
    userWorkerThreadInitialization->JoinWorker(t);
    // G4THREADJOIN(*t);
    delete t;
  }
#endif
  threads.clear();
}
 
void G4MTRunManager::AbortRun(G4bool softAbort)
{
  // This method is valid only for GeomClosed or EventProc state
  G4ApplicationState currentState =
    G4StateManager::GetStateManager()->GetCurrentState();
  if(currentState == G4State_GeomClosed || currentState == G4State_EventProc)
  {
    runAborted = true;
    MTkernel->BroadcastAbortRun(softAbort);
  }
  else
  {
    G4cerr << "Run is not in progress. AbortRun() ignored." << G4endl;
  }
}
 
void G4MTRunManager::AbortEvent()
{
  // nothing to do in the master thread
}
 
void G4MTRunManager::WaitForReadyWorkers()
{
  beginOfEventLoopBarrier.Wait(GetNumberActiveThreads());
  endOfEventLoopBarrier.ResetCounter();
  beginOfEventLoopBarrier.ReleaseBarrier();
}
 
void G4MTRunManager::ThisWorkerReady()
{
  beginOfEventLoopBarrier.ThisWorkerReady();
}
 
void G4MTRunManager::WaitForEndEventLoopWorkers()
{
  endOfEventLoopBarrier.Wait(GetNumberActiveThreads());
  beginOfEventLoopBarrier.ResetCounter();
  endOfEventLoopBarrier.ReleaseBarrier();
}
 
void G4MTRunManager::ThisWorkerEndEventLoop()
{
  endOfEventLoopBarrier.ThisWorkerReady();
}
 
void G4MTRunManager::NewActionRequest(
  G4MTRunManager::WorkerActionRequest newRequest)
{
  nextActionRequestBarrier.Wait(GetNumberActiveThreads());
  // nextActionRequest is a shared resource, but there is no
  // data-race thanks to the barrier: all threads are waiting
  nextActionRequest = newRequest;
  nextActionRequestBarrier.ReleaseBarrier();
}
 
G4MTRunManager::WorkerActionRequest
G4MTRunManager::ThisWorkerWaitForNextAction()
{
  nextActionRequestBarrier.ThisWorkerReady();
  return nextActionRequest;
}
 
void G4MTRunManager::RequestWorkersProcessCommandsStack()
{
  PrepareCommandsStack();
  NewActionRequest(WorkerActionRequest::PROCESSUI);
  processUIBarrier.SetActiveThreads(GetNumberActiveThreads());
  processUIBarrier.WaitForReadyWorkers();
}
 
void G4MTRunManager::ThisWorkerProcessCommandsStackDone()
{
  processUIBarrier.ThisWorkerReady();
}
void G4MTRunManager::SetPinAffinity(G4int n)
{
  if(n == 0)
  {
    G4Exception("G4MTRunManager::SetPinAffinity", "Run0114", FatalException,
                "Pin affinity must be >0 or <0.");
  }
  pinAffinity = n;
  return;
}