LocalIoHandler.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.local;

import io.netty.channel.IoHandlerContext;
import io.netty.channel.IoHandle;
import io.netty.channel.IoHandler;
import io.netty.channel.IoHandlerFactory;
import io.netty.channel.IoOps;
import io.netty.channel.IoRegistration;
import io.netty.util.concurrent.ThreadAwareExecutor;
import io.netty.util.internal.StringUtil;

import java.util.HashSet;
import java.util.Objects;
import java.util.Set;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.locks.LockSupport;

public final class LocalIoHandler implements IoHandler {
    private final Set<LocalIoHandle> registeredChannels = new HashSet<LocalIoHandle>(64);
    private final ThreadAwareExecutor executor;
    private volatile Thread executionThread;

    private LocalIoHandler(ThreadAwareExecutor executor) {
        this.executor = Objects.requireNonNull(executor, "executor");
    }

    /**
     * Returns a new {@link IoHandlerFactory} that creates {@link LocalIoHandler} instances.
     */
    public static IoHandlerFactory newFactory() {
        return LocalIoHandler::new;
    }

    private static LocalIoHandle cast(IoHandle handle) {
        if (handle instanceof LocalIoHandle) {
            return (LocalIoHandle) handle;
        }
        throw new IllegalArgumentException("IoHandle of type " + StringUtil.simpleClassName(handle) + " not supported");
    }

    @Override
    public int run(IoHandlerContext context) {
        if (executionThread == null) {
            executionThread = Thread.currentThread();
        }
// ... (96 more lines)