[Insight-developers] Question about delete on VC++
Miller, James V (Research)
millerjv@crd.ge.com
Mon, 30 Sep 2002 11:37:42 -0400
Jisung,
I am still working through your memory leak problems.
I noticed that you have an implementation of QuickSelect in the
Statistics algorithms. Is there a reason you are not using the
versions that are in STL (std::nth_element)?
It looks like itkStatisticsAlgorithms has a lot of sorting and
searching code. Could the STL algorithms be used instead?
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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> > > > =====
> > > > 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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