/*****************************************************************************
* Project: RooFit *
* Package: RooFitCore *
* File: $Id: RooRefCountList.cc,v 1.9 2005/06/20 15:45:14 wverkerke Exp $
* Authors: *
* WV, Wouter Verkerke, UC Santa Barbara, verkerke@slac.stanford.edu *
* DK, David Kirkby, UC Irvine, dkirkby@uci.edu *
* *
* Copyright (c) 2000-2005, Regents of the University of California *
* and Stanford University. All rights reserved. *
* *
* Redistribution and use in source and binary forms, *
* with or without modification, are permitted according to the terms *
* listed in LICENSE (http://roofit.sourceforge.net/license.txt) *
*****************************************************************************/
// -- CLASS DESCRIPTION [AUX] --
// A RooRefCountList is a RooLinkedList that keeps a reference counter
// with each added node. Multiple Add()s of the same object will increase
// the counter instead of adding multiple copies. Remove() decrements the
// reference count until zero, when the object is actually removed.
#include "RooFit.h"
#include "RooRefCountList.h"
#include "RooRefCountList.h"
#include "Riostream.h"
#include <stdlib.h>
ClassImp(RooRefCountList)
;
RooRefCountList::RooRefCountList()
: RooLinkedList(17)
{
}
void RooRefCountList::Add(TObject* obj, Int_t count)
{
// Check if we already have it
TObject* listObj = FindObject(obj) ;
if (!listObj) {
// Add to list with reference count
RooLinkedList::Add(obj, count) ;
//cout << "RooRefCountList::AddLast(" << obj << ") adding object" << endl ;
} else {
RooLinkedListElem* link = findLink(obj) ;
while(count--) link->incRefCount() ;
//cout << "RooRefCountList::AddLast(" << obj << ") incremented reference count to " << link->refCount() << endl ;
}
}
Bool_t RooRefCountList::Remove(TObject* obj)
{
RooLinkedListElem* link = findLink(obj) ;
if (!link) {
return 0 ;
} else {
if (link->decRefCount()==0) {
//cout << "RooRefCountList::AddLast(" << obj << ") removed object" << endl ;
return RooLinkedList::Remove(obj) ;
}
//cout << "RooRefCountList::AddLast(" << obj << ") decremented reference count to " << link->refCount() << endl ;
}
return 0 ;
}
Bool_t RooRefCountList::RemoveAll(TObject* obj)
{
return RooLinkedList::Remove(obj) ;
}
Int_t RooRefCountList::refCount(TObject* obj)
{
RooLinkedListElem* link = findLink(obj) ;
if (!link) {
return 0 ;
} else {
return link->refCount() ;
}
}
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