G4PDefManager.cc

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//
// G4PDefManager class implementation
//
// Author: Xin Dong, 25.01.2009 - First implementation
//                                from automatic MT conversion.
// --------------------------------------------------------------------
 
#include <stdlib.h>
 
#include "G4PDefManager.hh"
#include "globals.hh"
#include "pwdefs.hh"
#include "G4AutoLock.hh"
 
void G4PDefData::initialize()
{
  theProcessManager = nullptr;
}
 
G4int& G4PDefManager::slavetotalspace()
{
  G4ThreadLocalStatic G4int _instance = 0;
  return _instance;
}
 
G4PDefData*& G4PDefManager::offset()
{
  G4ThreadLocalStatic G4PDefData* _instance = nullptr;
  return _instance;
}
 
G4PDefManager::G4PDefManager() : totalobj(0)
{
  G4MUTEXINIT(mutex);
}
 
G4int G4PDefManager::CreateSubInstance()
  // Invoked by the master or work thread to create a new subinstance
  // whenever a new split class instance is created. For each worker
  // thread, ions are created dynamically.
{
  G4AutoLock l(&mutex);
  ++totalobj;
  if (totalobj > slavetotalspace())
  {
    l.unlock();
    NewSubInstances();
    l.lock();
  }
  return (totalobj - 1);
}
 
void G4PDefManager::NewSubInstances()
  // Invoked by each worker thread to grow the subinstance array and
  // initialize each new subinstance using a particular method defined
  // by the subclass.
{
  G4AutoLock l(&mutex);
  if (slavetotalspace()  >= totalobj)  { return; }
  G4int originaltotalspace = slavetotalspace();
  slavetotalspace() = totalobj + 512;
  offset() = (G4PDefData *) realloc(offset(),
                                    slavetotalspace() * sizeof(G4PDefData));
  if (offset() == nullptr)
  {
    G4Exception("G4PDefManager::NewSubInstances()",
                "OutOfMemory", FatalException, "Cannot malloc space!");
  }
 
  for (G4int i = originaltotalspace; i < slavetotalspace(); ++i)
  {
    offset()[i].initialize();
  }
}
 
void G4PDefManager::FreeSlave()
  // Invoked by all threads to free the subinstance array.
{
  if (offset() == nullptr)  { return; }
  free(offset());
  offset() = nullptr;
}
 
G4PDefData* G4PDefManager::GetOffset()
{
  return offset();
}
 
void G4PDefManager::UseWorkArea( G4PDefData* newOffset )
  // Use recycled work area, which was created previously.
{
  if( (offset() != nullptr) && (offset() != newOffset) )
  {
    G4Exception("G4PDefManager::UseWorkspace()",
                "InvalidCondition", FatalException,
                "Thread already has workspace - cannot use another.");
  }
  offset() = newOffset;
}
 
G4PDefData* G4PDefManager::FreeWorkArea()
  // Detach this thread from this Location
  // The object which calls this method is responsible for it.
{
  G4PDefData* offsetRet = offset();
  offset() = nullptr;
  return offsetRet;
}