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Re: [Dynapi-Dev] memory leak
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From: Raymond I. <xw...@ya...> - 2003-07-29 17:45:44
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Hi Jeremy,
See below:
--- Jeremy Wanamaker <je...@ma...> wrote:
> I've solved the problem I posted earlier. I forgot
> to call the DynLayer
> prototype in my ImgButton prototype. The first two
> lines of the ImgButton
> function in my ModWindow widget should be:
>
> this.DynLayer=DynLayer;
> this.DynLayer();
>
> This fixes the memory leak in Mozilla1.4/NS7.1, but
> IE 6 still leaks. It's
> less than before, but still there. I can live with
> it for now.
Cool!
>...Now if I
> could just fix that pesky permission denied error in
> Mozilla, I'd be happy.
Well I believe this to be a Mozilla 1.4 bug. You can
also try dropping mozilla a line about this
Here's how you can reproduce the error:
<script>
function scan(e,elm) {
var r = e.relatedTarget;
while(r && r.parentNode){
r = r.parentNode; // error occurs here
//alert(r)
}
}
</script>
<div id="dv"
style="position:absolute;left:100;top:100">
<form name="frm">
<input type="textbox" name="tbox" value="test..."
onmouseover="scan(event,this)"
onmouseout="scan(event,this)">
</form>
</div>
The problem was traced back to mouse_dom.js line 49-51
MouseEvent._getContainerLayerOf = function(element) {
if (!element) return null;
while (!element._dynobj && element.parentNode &&
element.parentNode!=element) {
element = element.parentNode;
}
return element._dynobj;
};
Can anyone offer some help with this or post a message
to mozilla?
--
Raymond Irving
> 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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> > > > >
> _______________________________________________
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> > > > > Dyn...@li...
> > > > >
> > > >
> > >
> >
>
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> > > >
> > > >
> > > > __________________________________
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> > >
> >
> > > ATTACHMENT part 2 application/x-zip-compressed
> > name=mem_leak.zip
>
=== message truncated ===
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