Re: varptr to structs returns bad pointer value

[Jussi Lahtinen <jussi.lahtinen@xxxxxxxxx>]

If I remember correctly structures cannot be declared locally, they must be
at least private... so "mydata = new myStruct" might not be valid. And as
Vuott said there is a missing keyword, which isn't even accepted within a
function. So... maybe this just creates object instead of structure.

Anyway, some error should be raised.


Jussi


On Mon, Mar 3, 2025 at 2:24 AM <vuott@xxxxxxxxxxxx> wrote:

> He should try:
>
>
> Private Extern myFunction(data As Pointer) In "mylib"
>
> Public Struct myStruct
>     result As Long
>     msg As String
> End Struct
>
> Private myData As Struct Mystruct
>
> Public Sub doit2()
>
>   myFunction(VarPtr(myData))
>
> End
>
>
> ----------------------------------------------------------------------------------
>
>
>
>
>
> 2 mar 2025, 22:43 da jussi.lahtinen@xxxxxxxxx:
>
>
> No this does not pass the correct pointer, I am trying to pass a generic
> structure, I want to use pointers.
>
> I see, it wasn't clear from the example code you gave.  I agree with your
> implementation plan.
>
>
> I am sorry but varptr(xxx)    should return a pointer to the actual memory
> containing the structure.
>
> I agree, but this isn't in the documentation and it seems it is not
> implemented [cannot find it under void SUBR_varptr(ushort code)
> ]. For the reasons Benoit knows, this is not raising error either. I don't
> know enough about the implementation details to say more.
> Maybe this can be added.
>
> Jussi
>
>
>
>