1 /*
2 * Copyright 2016 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.netty5.channel.kqueue;
17
18 /**
19 * This class is necessary to break the following cyclic dependency:
20 * <ol>
21 * <li>JNI_OnLoad</li>
22 * <li>JNI Calls FindClass because RegisterNatives (used to register JNI methods) requires a class</li>
23 * <li>FindClass loads the class, but static members variables of that class attempt to call a JNI method which has not
24 * yet been registered.</li>
25 * <li>java.lang.UnsatisfiedLinkError is thrown because native method has not yet been registered.</li>
26 * </ol>
27 * Static members which call JNI methods must not be declared in this class!
28 */
29 final class KQueueStaticallyReferencedJniMethods {
30 private KQueueStaticallyReferencedJniMethods() { }
31
32 static native short evAdd();
33 static native short evEnable();
34 static native short evDisable();
35 static native short evDelete();
36 static native short evClear();
37 static native short evEOF();
38 static native short evError();
39
40 // data/hint fflags for EVFILT_SOCK, shared with userspace.
41 static native short noteReadClosed();
42 static native short noteConnReset();
43 static native short noteDisconnected();
44
45 static native short evfiltRead();
46 static native short evfiltWrite();
47 static native short evfiltUser();
48 static native short evfiltSock();
49
50 // Flags for connectx(2)
51 static native int connectResumeOnReadWrite();
52 static native int connectDataIdempotent();
53
54 // Sysctl values.
55 static native int fastOpenClient();
56 static native int fastOpenServer();
57 }