Function __close_conn

examples/proxy.c:874–886

* Close this connection - send a ring message to the connection with intent * to stop. When the client gets the message, it will initiate the stop. */

 * to stop. When the client gets the message, it will initiate the stop.
 */
static void __close_conn(struct io_uring *ring, struct conn *c)
{
	struct io_uring_sqe *sqe;
	uint64_t user_data;

	printf("Client %d: queueing stop\n", c->tid);

	user_data = __raw_encode(c->tid, __STOP, 0, 0);
	sqe = io_uring_get_sqe(ring);
	io_uring_prep_msg_ring(sqe, c->ring.ring_fd, 0, user_data, 0);
	encode_userdata(sqe, c, __NOP, 0, 0);
	io_uring_submit(ring);
}

static void close_cd(struct conn *c, struct conn_dir *cd)
{