> On Sep 15, 2022, at 12:28 PM, Sven Barth <[email protected]> wrote:
>
> As mentioned elsewhere function references are in fact interfaces. And you
> can't retrieve a method pointer to a interface function, cause relying on
> that would result in either memory leaks or premature release of the
> interface, because TMethod only contains a Pointer for the Data field that
> does not support managed types.
>
> You can get a reference to the raw interface by doing this however:
>
> === code begin ===
>
> var
> proc: reference to procedure;
> i: IUnknown;
> begin
> i := IUnknown(PPointer(@proc)^);
> end.
>
> === code end ===
>
> Though I don't know what you hope to achieve with this...
Ok so what’s happening is I had a deferred dispatch library that used many
different callback types and now I want to unify it using references. Problem
is, with the old design I used “of object” types so I was able to get the
target class and use it do to things like cancel all actions that were
associated with a particular class.
I don’t understand how memory loss could be in play. If the function reference
is stored and not freed it should have the information needed to invoke a
method and in theory you should be able to retrieve it anytime, providing the
interface had a public method for this (which would be a nice extension to
add). How is that not correct?
Regards,
Ryan Joseph
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