1 /*
2 * Copyright 2024 The Netty Project
3 *
4 * The Netty Project licenses this file to you under the Apache License,
5 * version 2.0 (the "License"); you may not use this file except in compliance
6 * with the License. You may obtain a copy of the License at:
7 *
8 * https://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13 * License for the specific language governing permissions and limitations
14 * under the License.
15 */
16 package io.netty.channel.uring;
17
18 final class UserData {
19 private UserData() {
20 }
21
22 /**
23 * Encode the given data into a long that can be stored as udata.
24 *
25 * @param id the id.
26 * @param op the operation
27 * @param data the custom data
28 * @return the udata.
29 */
30 static long encode(int id, byte op, short data) {
31 return ((long) data << 48) | ((op & 0xFFL) << 32) | id & 0xFFFFFFFFL;
32 }
33
34 static void decode(int res, int flags, long udata, CompletionCallback callback) {
35 int id = decodeId(udata);
36 byte op = decodeOp(udata);
37 short data = decodeData(udata);
38 callback.handle(res, flags, id, op, data);
39 }
40
41 static int decodeId(long udata) {
42 return (int) (udata & 0xFFFFFFFFL);
43 }
44
45 static byte decodeOp(long udata) {
46 return (byte) ((udata >>> 32) & 0xFFL);
47 }
48
49 static short decodeData(long udata) {
50 return (short) (udata >>> 48);
51 }
52 }