EpollIoOps.java — netty Source File

Source Code

/*
 * Copyright 2024 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:
 *
 *   https://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;

import io.netty.channel.IoOps;

/**
 * Implementation of {@link IoOps} that is used by {@link EpollIoHandler} and so for epoll based transports.
 */
public final class EpollIoOps implements IoOps {

    static {
        // Need to ensure we load the native lib before trying to use the values in Native to construct the different
        // instances.
        Epoll.ensureAvailability();
    }

    /**
     * Interested in IO events which tell that the underlying channel is writable again or a connection
     * attempt can be continued.
     */
    public static final EpollIoOps EPOLLOUT = new EpollIoOps(Native.EPOLLOUT);

    /**
     * Interested in IO events which should be handled by finish pending connect operations
     */
    public static final EpollIoOps EPOLLIN = new EpollIoOps(Native.EPOLLIN);

    /**
     * Error condition happened on the associated file descriptor.
     */
    public static final EpollIoOps EPOLLERR = new EpollIoOps(Native.EPOLLERR);

    /**
     * Interested in IO events which should be handled by reading data.
     */
    public static final EpollIoOps EPOLLRDHUP = new EpollIoOps(Native.EPOLLRDHUP);

    public static final EpollIoOps EPOLLET = new EpollIoOps(Native.EPOLLET);

    static final int EPOLL_ERR_OUT_MASK = EpollIoOps.EPOLLERR.value | EpollIoOps.EPOLLOUT.value;
    static final int EPOLL_ERR_IN_MASK = EpollIoOps.EPOLLERR.value | EpollIoOps.EPOLLIN.value;
    static final int EPOLL_RDHUP_MASK = EpollIoOps.EPOLLRDHUP.value;

    // Just use an array to store often used values.
    private static final EpollIoEvent[] EVENTS;

// ... (150 more lines)