Interfaceobject := nil doesn't call destructor.

Alex Penner

Delphi Developer

Sat, 23 Aug 2003 18:08:57 GMT

Interfaceobject := nil doesn't call destructor.

Hello,

I have such TSection Object:

TSections = class (TAutoIntfObject, ISections)
private
FSections: TInterfaceList;
...
In it's destructor I need to release TInterfaceList.

There is also a method in my program that calls:
// Create Sections again
FSections := nil;
FSections := TSections.Create(Self);
..
I use this function to recreate the sections list.
First (but only first) time FSections := nil calls my destructor. After that
don't!

What's wrong?

Alex

Alessandro Federic

Delphi Developer

Sun, 24 Aug 2003 05:15:04 GMT

Re:Interfaceobject := nil doesn't call destructor.

TAutointfObject constructor looks like "constructor Create(const TypeLib:
ITypeLib; const DispIntf: TGUID);"

Quote

> TSections = class (TAutoIntfObject, ISections)
[..]
> FSections := TSections.Create(Self);

I don't see how this can work...

Binh L

Delphi Developer

Sun, 24 Aug 2003 11:24:19 GMT

Re:Interfaceobject := nil doesn't call destructor.

The type of FSessions has to be ISections, not TSections for reference
counting to work properly.

--
have fun

Binh Ly
www.techvanguards.com

Quote

"Alex Penner" <a...@c-studios.de> wrote in message

news:3aa4b755$1_1@dnews...

Quote

> There is also a method in my program that calls:
> // Create Sections again
> FSections := nil;
> FSections := TSections.Create(Self);
> ..
> I use this function to recreate the sections list.
> First (but only first) time FSections := nil calls my destructor. After
that
> don't!

> What's wrong?

> Alex

Alessandro Federic

Delphi Developer

Sun, 24 Aug 2003 12:39:01 GMT

Re:Interfaceobject := nil doesn't call destructor.

Quote

> The type of FSessions has to be ISections, not TSections for reference
> counting to work properly.

Sure but FSections has been declared as TInterfaceList, so has to be freed
explicitly...
That code just does not compute (including that Create(Self))...

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