RE: [ROOT] problem with stl functions

From: Philippe Canal (pcanal@fnal.gov)
Date: Fri Jun 27 2003 - 17:06:12 MEST 

Hi Pierre,

There is nothing obviously wrong in the code.  With the latest ROOT the
proper sequences of constructor and destructor seems to be called for your
IoSdStation.  So my only guess would be to look carefully at the
implementation of the assignement operator for that class (which you did not
send).

Even if there was a memory leak, the fact that you accumulate memory until
it crashes leads me to believe that you have a very large number of
IoSdEvent object.  Is there a reason you chose not to use a TTree for this
purpose?  It seems like it would be much more efficient.

Cheers,
Philippe.

-----Original Message-----
From: owner-roottalk@pcroot.cern.ch
[mailto:owner-roottalk@pcroot.cern.ch]On Behalf Of Pierre Da Silva
Sent: Friday, June 27, 2003 9:06 AM
To: roottalk@pcroot.cern.ch
Subject: [ROOT] problem with stl functions


	Dear rooters,

	We have a TFile filled with "IoSdEvent" objects. When we take one
object out (see the piece of code below), memory is growing up until
everything crashes. We know that this came from one vector of
"IoSdStation" objects, but we don't know how and why. Notice that this
problem only appears when reading the objects, and not when writing them
on the file.

  TFile f3("converted.root","READ");
  TList *list = f3.GetListOfKeys();
  TIter next(list);
  TKey *tmpkey;
  IoSdEvent mem;
  while((tmpkey = (TKey *)next())) {
    tmpkey->Read((TObject *)&mem);
    cout<<" "<<mem.Id<<endl;
  }

I join our classes in the attached file. Thanks in advance.


				###############################
				Pierre Da Silva
				Email: pdasilva@lpnhep.in2p3.fr
				Tel.: 01 44 27 62 74

				LPNHE
				4, place Jussieu
				Tour 33 - Rez de Chaussee
				75252 PARIS Cedex 05 - FRANCE
				Tel.: 01 44 27 63 13
			 	Fax: 01 44 27 46 38
				###############################


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