Get the callback data that will be passed into callback functions.
#include <glview/glview.h>
GLVIEW_API int glview_get_callback_data(void **callback_data)
BlackBerry 10.0.0
The out parameter that gets set to the app-specific data obtained by calls to the glview_set_callback_data() function.
Retrieve the app specific data that is being passed into any invoked callback.