1 /*
2 * Copyright 2022 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.handler.codec.quic;
17
18 /**
19 * A SSL related task that will be returned by {@link BoringSSL#SSL_getTask(long)}.
20 */
21 abstract class BoringSSLTask implements Runnable {
22 private final long ssl;
23 protected boolean didRun;
24
25 // These fields are accessed via JNI.
26 private int returnValue;
27 private volatile boolean complete;
28
29 protected BoringSSLTask(long ssl) {
30 // It is important that this constructor never throws. Be sure to not change this!
31 this.ssl = ssl;
32 }
33
34 @Override
35 public final void run() {
36 if (!didRun) {
37 didRun = true;
38 runTask(ssl, (long ssl, int result) -> {
39 returnValue = result;
40 complete = true;
41 });
42 }
43 }
44
45 /**
46 * Called once the task should be destroyed.
47 */
48 protected void destroy() {
49 // Noop
50 }
51
52 /**
53 * Run the task and return the return value that should be passed back to OpenSSL.
54 */
55 protected abstract void runTask(long ssl, TaskCallback callback);
56
57 interface TaskCallback {
58 void onResult(long ssl, int result);
59 }
60 }