Re: [Dynapi-Dev] memory leak

[Jeremy W. <je...@ma...>]

Thanks for your help Raymond. This did fix the error I was getting in IE,
but there is still a memory leak. There is something funny about this
widget. I was looking at it in the Mozilla DOM inspector and I noticed that
there are multiple DynObjects with the same id. The ImgButton layer and it's
children have the same id in both instances of ModWindow. I traced through
the code, but couldn't figure out why this was happening. Maybe this has
something to do with the error message. If anyone has a clue as to why this
would happen, let me know. I'll keep looking at it.

Jeremy


----- Original Message -----
From: "Raymond Irving" <xw...@ya...>
To: <dyn...@li...>
Cc: "Jeremy Wanamaker" <je...@ma...>
Sent: Monday, July 28, 2003 11:53 AM
Subject: Re: [Dynapi-Dev] memory leak


> Hi Jeremy,
>
> This should fix the error. Make the change to the
> dynlayer_base.js file.
>
> p._destroyAllChildren = function() {
> for (var i=0;i<this.children.length;i++) {
> this.children[i]._destroy();
> delete this.children[i];
> }
> this.children.length=0;
> };
>
> It's very strange I don't see a memory leak with the
> following examples:
>
> dynapi.api.dynlayer-destroy.html
> speedtest.dynlayer-deep_nest.html
>
> It seems that the ModWindow object is not doing
> something right. I don't understand why.
>
> Does anyone have any idea or solution?
>
>
> --
> Raymond Irving
>
>
> --- Jeremy Wanamaker <je...@ma...> wrote:
> > I've attached a sample of my code which causes the
> > error for me in IE 6. In
> > my code, I have called 2 instances of my ModWindow
> > widget. If I only call
> > one instance, I don't get the error, but with two it
> > shows up. I believe it
> > may have to do with _destroy being called when the
> > 'unload' event fires.
> > Could it be that the _destroy function is unable to
> > finish before the page
> > is unloaded, thereby causing some object references
> > to be lost? This would
> > explain the memory leak.
> >
> > Jeremy Wanamaker
> >
> > ----- Original Message -----
> > From: "Raymond Irving" <xw...@ya...>
> > To: <dyn...@li...>
> > Cc: <je...@ma...>
> > Sent: Friday, July 25, 2003 6:18 PM
> > Subject: Re: [Dynapi-Dev] memory leak
> >
> >
> > >
> > > Could you please supply an example showing this
> > error?
> > >
> > > I think this has something to do with the
> > ._destroy()
> > > function
> > >
> > > --
> > > Raymond Irving
> > >
> > >
> > > --- Jeremy Wanamaker <je...@ma...>
> > wrote:
> > > > I been working with DynAPI 3 for a couple of
> > weeks
> > > > now. Overall, I'm very
> > > > impressed and optimistic about the future of
> > DynAPI.
> > > >
> > > > I'm having trouble with (what I believe is) a
> > memory
> > > > leak in dynapi.js at
> > > > line 106:
> > > >
> > > >         f.onunload = function() {
> > > >                 //alert('hi');
> > > >                 for (var
> > > > i=0;i<o._unloadfn.length;i++) o._unloadfn[i]();
> > > >                 if (o.document) {
> > > >                         o.document._destroy();
> > > >                         o.document = null;
> > > >                 }
> > > >         };
> > > >
> > > > I'm working on a window widget with quite a few
> > > > DynLayers and when unload
> > > > event triggers, the document unloads before the
> > > > above function is finished
> > > > and I get the following error in IE6:
> > > >
> > > >     Error:'this.children[...]' is null or not an
> > > > object
> > > >
> > > > ...at which point I notice that my available
> > system
> > > > memory has been reduced
> > > > by a couple hundred KBytes or so. I get the same
> > > > error in Netscape 7.1, but
> > > > I can get around it by changing the event
> > listener
> > > > from 'onunload' to
> > > > 'onbeforeunload'. Alas, this does not fix the
> > > > problem in IE. Has anyone else
> > > > run into this problem? Are there any known
> > > > workarounds? Thanks in advance
> > > > for you help and keep up the good work.
> > > >
> > > > Jeremy Wanamaker
> > > >
> > > >
> > > >
> > > >
> > >
> >
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>
> > ATTACHMENT part 2 application/x-zip-compressed
> name=mem_leak.zip
>
>
>
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