Function rcl_sys::rcl::wait::rcl_wait_set_add_client

pub unsafe extern "C" fn rcl_wait_set_add_client(
    wait_set: *mut rcl_wait_set_t, 
    client: *const rcl_client_t, 
    index: *mut usize
) -> rcl_ret_t

Store a pointer to the client in the next empty spot in the set.