G4PDefManager.cc

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//
// $Id: G4PDefManager.cc 101112 2016-11-07 08:19:33Z gcosmo $
//
//
// ------------------------------------------------------------
//
//  GEANT 4 class header file
//
// ---------------- G4PDefManager ----------------
//
// 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.
// ------------------------------------------------------------

#include <stdlib.h>

#include "G4PDefManager.hh"
#include "globals.hh"
#include "pwdefs.hh"
#include "G4AutoLock.hh"

void G4PDefData::initialize()
{
    theProcessManager = 0;
}

G4ThreadLocal G4int G4PDefManager::slavetotalspace=0;
G4ThreadLocal G4PDefData* G4PDefManager::offset=0;

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 == 0)
    {
        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)  { return; }
    free(offset);
    offset = 0;
}


G4PDefData*   G4PDefManager::GetOffset()
{
    return offset;
}

void G4PDefManager::UseWorkArea( G4PDefData* newOffset ) // ,  G4int numObjects, G4int numSpace)
{
    // Use recycled work area - which was created previously
    if( offset && offset!=newOffset )
    {
        G4Exception("G4PDefManager::UseWorkspace()",
                "TwoWorkspaces", FatalException,
                "Thread already has workspace - cannot use another.");
    }
    offset= newOffset;
    // totalobj= numObjects;
    // totalspace= numSpace;
}

G4PDefData* G4PDefManager::FreeWorkArea() // G4int* numObjects, G4int* numSpace)
{
    // Detach this thread from this Location
    // The object which calls this method is responsible for it.
    //
    G4PDefData* offsetRet= offset;

    offset= 0;

    return offsetRet;
}