• remi thebault (13/13) Aug 02 2015 Hello
• Mike Parker (4/16) Aug 02 2015 You have to declare it as a pointer, then retrieve the pointer in
• remi thebault (15/18) Aug 02 2015 and how would you make this source compatible with the static
• remi thebault (4/22) Aug 02 2015 I'll manage this through static @property-ies

"remi thebault" <remi.thebault outlook.com> writes:

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

"Mike Parker" <aldacron gmail.com> writes:

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).

"remi thebault" <remi.thebault outlook.com> writes:

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);

"remi thebault" <remi.thebault outlook.com> writes:

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