Function xcb::ffi::xproto::xcb_set_pointer_mapping_reply

pub unsafe extern "C" fn xcb_set_pointer_mapping_reply(
    c: *mut xcb_connection_t, 
    cookie: xcb_set_pointer_mapping_cookie_t, 
    error: *mut *mut xcb_generic_error_t
) -> *mut xcb_set_pointer_mapping_reply_t

the returned value must be freed by the caller using libc::free().