/*
 * Copyright 2016 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package io.netty.channel.kqueue;

This class is necessary to break the following cyclic dependency:

JNI_OnLoad
JNI Calls FindClass because RegisterNatives (used to register JNI methods) requires a class
FindClass loads the class, but static members variables of that class attempt to call a JNI method which has not
yet been registered.
java.lang.UnsatisfiedLinkError is thrown because native method has not yet been registered.

Static members which call JNI methods must not be declared in this class!
/**
 * This class is necessary to break the following cyclic dependency:
 * <ol>
 * <li>JNI_OnLoad</li>
 * <li>JNI Calls FindClass because RegisterNatives (used to register JNI methods) requires a class</li>
 * <li>FindClass loads the class, but static members variables of that class attempt to call a JNI method which has not
 * yet been registered.</li>
 * <li>java.lang.UnsatisfiedLinkError is thrown because native method has not yet been registered.</li>
 * </ol>
 * Static members which call JNI methods must not be declared in this class!
 */
final class KQueueStaticallyReferencedJniMethods {
    private KQueueStaticallyReferencedJniMethods() { }

    static native short evAdd();
    static native short evEnable();
    static native short evDisable();
    static native short evDelete();
    static native short evClear();
    static native short evEOF();
    static native short evError();

    // data/hint fflags for EVFILT_SOCK, shared with userspace.
    static native short noteReadClosed();
    static native short noteConnReset();
    static native short noteDisconnected();

    static native short evfiltRead();
    static native short evfiltWrite();
    static native short evfiltUser();
    static native short evfiltSock();
}