I got C library which was generated to binding via ffigen. I need to integrate it to my Flutter app. I added generated .dart file to my project and it has these types:
typedef emetryhub_bluetooth_ctx_t = ffi.Pointer<ffi.Void>;
typedef emetryhub_bluetooth_destroy_cb_t = ffi
.Pointer<ffi.NativeFunction<ffi.Int32 Function(emetryhub_bluetooth_ctx_t)>>;
external emetryhub_bluetooth_destroy_cb_t destroy_cb;
I am trying to define this C destroy_cb callback function in my Dart code
Int32 destroyBluetooth(emetryhub_bluetooth_ctx_t ctx) {
return 0 as Int32;
}
bluetooth.ref.destroy_cb = Pointer.fromFunction(destroyBluetooth);
and it gives me an error:
The type 'Int32 Function(Pointer<Void>)' must be a subtype of 'Int32 Function(Pointer<Void>)' for 'fromFunction'.
What am I missing?
