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Gabriele Cosmo
2017-02-28 16:18:37 +01:00
parent 4597adb7c4
commit 3a5407696b
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source/particles/management/include/G4PDefSplitter.hh
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//
// ********************************************************************
// * License and Disclaimer *
// * *
// * The Geant4 software is copyright of the Copyright Holders of *
// * the Geant4 Collaboration. It is provided under the terms and *
// * conditions of the Geant4 Software License, included in the file *
// * LICENSE and available at http://cern.ch/geant4/license . These *
// * include a list of copyright holders. *
// * *
// * Neither the authors of this software system, nor their employing *
// * institutes,nor the agencies providing financial support for this *
// * work make any representation or warranty, express or implied, *
// * regarding this software system or assume any liability for its *
// * use. Please see the license in the file LICENSE and URL above *
// * for the full disclaimer and the limitation of liability. *
// * *
// * This code implementation is the result of the scientific and *
// * technical work of the GEANT4 collaboration. *
// * By using, copying, modifying or distributing the software (or *
// * any work based on the software) you agree to acknowledge its *
// * use in resulting scientific publications, and indicate your *
// * acceptance of all terms of the Geant4 Software license. *
// ********************************************************************
//
//
// $Id: $
//
//
// ------------------------------------------------------------
//
// GEANT 4 class header file
//
// ---------------- G4PDefSplitter ----------------
//
// Utility template class for splitting RW data for thread-safety from
// classes: G4ParticleDefinition, G4VDecayChannel.
//
// ------------------------------------------------------------
// History:
// 01.25.2009 Xin Dong: First implementation from automatic MT conversion.
// ------------------------------------------------------------
#ifndef G4PDEFSPLITTER_HH
#define G4PDEFSPLITTER_HH
#include <stdlib.h>
#include "globals.hh"
#include "pwdefs.hh"
#include "G4AutoLock.hh"
template <class T> // T is the private data from the object to be split
class G4PDefSplitter
{
public:
G4PDefSplitter() : totalobj(0) {
G4MUTEXINIT(mutex);
}
G4int 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 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 = (T *) realloc(offset, slavetotalspace * sizeof(T));
if (offset == 0)
{
G4Exception("G4PDefSplitter::NewSubInstances()",
"OutOfMemory", FatalException, "Cannot malloc space!");
}
for (G4int i = originaltotalspace; i < slavetotalspace; i++)
{
offset[i].initialize();
}
}
void FreeSlave()
// Invoked by all threads to free the subinstance array.
{
if (!offset) { return; }
free(offset);
offset = 0;
}
T* GetOffset() { return offset; }
void UseWorkArea( T* newOffset ) // , G4int numObjects, G4int numSpace)
{
// Use recycled work area - which was created previously
if( offset && offset!=newOffset )
{
if( newOffset != offset )
{
G4Exception("G4PDefSplitter::UseWorkspace()",
"TwoWorkspaces", FatalException,
"Thread already has workspace - cannot use another.");
}
else
{
G4Exception("G4PDefSplitter::UseWorkspace()",
"TwoWorkspaces", JustWarning,
"Thread already has a workspace - trying to set the same again.");
}
}
offset= newOffset;
// totalobj= numObjects;
// totalspace= numSpace;
}
T* FreeWorkArea() // G4int* numObjects, G4int* numSpace)
{
// Detach this thread from this Location
// The object which calls this method is responsible for it.
//
T* offsetRet= offset;
offset= 0;
return offsetRet;
}
public:
G4PART_DLL G4ThreadLocalStatic G4int slavetotalspace;
G4PART_DLL G4ThreadLocalStatic T* offset;
private:
G4int totalobj;
G4Mutex mutex;
};
#endif