Hello

I wrote static bindings to a C library. I want to also offer a version(Dynamic) of the bindings.
I follow and use derelict-util to get the address of function pointers.

In the library I bind, there is also global variables. here's one example in the static bindings:

extern __gshared wl_interface wl_display_interface;

(wl_interface is a struct, not a pointer alias)

How would one make dynamic binding of this?
Is it possible to retrieve the address of the symbol and use std.conv.emplace?

thank you

On Sunday, 2 August 2015 at 15:31:48 UTC, remi thebault wrote:
> Hello
>
> I wrote static bindings to a C library. I want to also offer a version(Dynamic) of the bindings.
> I follow and use derelict-util to get the address of function pointers.
>
> In the library I bind, there is also global variables. here's one example in the static bindings:
>
> extern __gshared wl_interface wl_display_interface;
>
> (wl_interface is a struct, not a pointer alias)
>
> How would one make dynamic binding of this?
> Is it possible to retrieve the address of the symbol and use std.conv.emplace?
>
You have to declare it as a pointer, then retrieve the pointer in the same way you do the function pointers, via the system loader (GetProcAddress/dlsym).

On Sunday, 2 August 2015 at 15:38:34 UTC, Mike Parker wrote:
> You have to declare it as a pointer, then retrieve the pointer in the same way you do the function pointers, via the system loader (GetProcAddress/dlsym).

and how would you make this source compatible with the static binding version?
I guess it is not possible

extern(C):
version(Dynamic) {
    __gshared wl_interface *wl_display_interface;
}
else {
    extern __gshared wl_interface wl_display_interface;
}


// use case: some_func expects a pointer to wl_interface
// the C version is using addressof operator, (as do the static D bindings)
some_func(&wl_display_interface);

On Sunday, 2 August 2015 at 16:20:29 UTC, remi thebault wrote:
> On Sunday, 2 August 2015 at 15:38:34 UTC, Mike Parker wrote:
>> You have to declare it as a pointer, then retrieve the pointer in the same way you do the function pointers, via the system loader (GetProcAddress/dlsym).
>
> and how would you make this source compatible with the static binding version?
> I guess it is not possible
>
> extern(C):
> version(Dynamic) {
>     __gshared wl_interface *wl_display_interface;
> }
> else {
>     extern __gshared wl_interface wl_display_interface;
> }
>
>
> // use case: some_func expects a pointer to wl_interface
> // the C version is using addressof operator, (as do the static D bindings)
> some_func(&wl_display_interface);

I'll manage this through static @property-ies

thanks for your help

Rémi