[Insight-developers] Question about delete on VC++

[Jisung Kim]

Thanks, Jim.

Could you tell me how did you found the memory leaks?
I was experimenting with _CrtDumpMemoryLeaks()
function. It would be helpful in future.

Thank you very much,

Jisung.

--- "Miller, James V (Research)" <millerjv@crd.ge.com>
wrote:
> Jisung,
> 
> I just fixed the memory leaks in your KdTree.
> 
> The base kd-node class did not have a "virtual"
> destructor.  When the 
> tree was being deleted, the destructors for "real"
> kd-nodes was not 
> being called.
> 
> Jim
> 
> 
> 
> > -----Original Message-----
> > From: Jisung Kim [mailto:bahrahm@yahoo.com]
> > Sent: Friday, September 27, 2002 1:53 PM
> > To: Jisung Kim; Miller, James V (Research);
> insight-dev-list
> > Subject: RE: [Insight-developers] Question about
> delete on VC++
> > 
> > 
> > The print out result shows exact match between
> > addresses of pointer (to nodes) and the order. 
> > 
> > 
> > --- Jisung Kim <bahrahm@yahoo.com> wrote:
> > > In a same thread.
> > > 
> > > I will do printing out address of nodes in
> creation
> > > and deletion in VC++ too. And let you know the
> > > result.
> > > 
> > > --- "Miller, James V (Research)"
> > > <millerjv@crd.ge.com>
> > > wrote:
> > > > Are those in different threads?
> > > > 
> > > > 
> > > > 
> > > > > -----Original Message-----
> > > > > From: Jisung Kim [mailto:bahrahm@yahoo.com]
> > > > > Sent: Friday, September 27, 2002 12:48 PM
> > > > > To: Miller, James V (Research);
> insight-dev-list
> > > > > Subject: RE: [Insight-developers] Question
> about
> > > > delete on VC++
> > > > > 
> > > > > 
> > > > > Yes, the tree was created by the
> > > > > itkWeightedCenteroidKdTreeGenerator and the
> > > > deletion
> > > > > logic is inside of the itkKdTree.
> > > > > 
> > > > > Is it a problem?
> > > > > 
> > > > > Thanks,
> > > > > 
> > > > > 
> > > > > --- "Miller, James V (Research)"
> > > > <millerjv@crd.ge.com>
> > > > > wrote:
> > > > > > Another thought.  Is the data allocated in
> one
> > > > > > thread and destroyed
> > > > > > in another thread?
> > > > > > 
> > > > > > 
> > > > > > 
> > > > > > > -----Original Message-----
> > > > > > > From: Miller, James V (Research) 
> > > > > > > Sent: Friday, September 27, 2002 12:07
> PM
> > > > > > > To: 'Jisung Kim'; insight-dev-list
> > > > > > > Subject: RE: [Insight-developers]
> Question
> > > > about
> > > > > > delete on VC++
> > > > > > > 
> > > > > > > 
> > > > > > > Strange.  If we were building Dlls, I
> would
> > > > say
> > > > > > that maybe we were
> > > > > > > allocating nodes in one DLL and
> deallocating
> > > > them
> > > > > > in another DLL.
> > > > > > > (I think each DLL has its own heap
> > > > management).
> > > > > > But since we are 
> > > > > > > not building DLLs, then that is not the
> > > > problem.
> > > > > > > 
> > > > > > > Have you run with VC the version that
> prints
> > > > out
> > > > > > all the node
> > > > > > > allocation and deletions?
> > > > > > > 
> > > > > > > Is there anything "inside" a node that
> is
> > > not
> > > > > > being deleted? 
> > > > > > > Perhaps a 
> > > > > > > subitem is missing a destructor that
> needs
> > > to
> > > > do
> > > > > > something 
> > > > > > > that another
> > > > > > > compiler is providing by default.
> > > > > > > 
> > > > > > > 
> > > > > > > 
> > > > > > > 
> > > > > > > Friday, September 27, 2002 10:16 AM
> > > > > > > > To: insight-dev-list
> > > > > > > > Subject: [Insight-developers] Question
> > > about
> > > > > > delete on VC++
> > > > > > > > 
> > > > > > > > 
> > > > > > > > Hi.
> > > > > > > > 
> > > > > > > > I have a question for memory
> deallocation
> > > in
> > > > > > VC++.
> > > > > > > > 
> > > > > > > > Currently, my
> > > > itkKdTreeBasedKmeansEstimatorTest
> > > > > > is
> > > > > > > > leaking memory on VC++ machine. It
> seems
> > > > like
> > > > > > that the
> > > > > > > > some of the k-d tree nodes has not
> been
> > > > deleted.
> > > > > > > > However, On linux, it didn't have any
> > > leak.
> > > > I
> > > > > > traced
> > > > > > > > the creation and deletion of nodes by
> > > print
> > > > out
> > > > > > the
> > > > > > > > address of each nodes. And the result
> > > shows
> > > > > > perfect
> > > > > > > > match between creation and deletion.
> > > > > > > > 
> > > > > > > > Is there anything more than calling
> > > "delete"
> > > > to
> > > > > > delete
> > > > > > > > an object. I think I read an article
> from
> > > MS
> > > > > > about
> > > > > > > > using delete and also assign zero to
> the
> > > > pointer
> > > > > > to
> > > > > > > > properly delete object in a long time
> ago.
> > > > Is it
> > > > > > the
> > > > > > > > case? Should I assign zero to the
> pointer
> > > > after
> > > > > > > > calling delete?
> > > > > > > > 
> > > > > > > > Thank you,
> > > > > > > > 
> > > > > > > > 
> > > > > > > > 
> > > > > > > > =====
> > > > > > > > Jisung Kim
> > > > > > > > bahrahm@yahoo.com
> > > > > > > > 106 Mason Farm Rd.
> > > > > > > > 129 Radiology Research Lab., CB# 7515
> > > > > > > > Univ. of North Carolina at Chapel Hill
> > > > > > > > Chapel Hill, NC 27599-7515
> > > > > > > > 
> > > > > > > >
> > > > > >
> > > >
> __________________________________________________
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> 
=== message truncated ===


=====
Jisung Kim
bahrahm@yahoo.com
106 Mason Farm Rd.
129 Radiology Research Lab., CB# 7515
Univ. of North Carolina at Chapel Hill
Chapel Hill, NC 27599-7515

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