com.alibaba.rocketmq.shade.io.netty.channel.epoll.NativeStaticallyReferencedJniMethods Maven / Gradle / Ivy
/*
* 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.epoll;
/**
* 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!
*/
final class NativeStaticallyReferencedJniMethods {
private NativeStaticallyReferencedJniMethods() { }
static native int epollin();
static native int epollout();
static native int epollrdhup();
static native int epollet();
static native int epollerr();
static native long ssizeMax();
static native int tcpMd5SigMaxKeyLen();
static native int iovMax();
static native int uioMaxIov();
static native boolean isSupportingSendmmsg();
static native boolean isSupportingTcpFastopen();
static native String kernelVersion();
}