FastThreadLocalThread.java — netty Source File

Source Code

/*
* Copyright 2014 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.util.concurrent;

import io.netty.util.internal.InternalThreadLocalMap;
import io.netty.util.internal.LongLongHashMap;
import io.netty.util.internal.logging.InternalLogger;
import io.netty.util.internal.logging.InternalLoggerFactory;

import java.util.concurrent.atomic.AtomicReference;

/**
 * A special {@link Thread} that provides fast access to {@link FastThreadLocal} variables.
 */
public class FastThreadLocalThread extends Thread {

    private static final InternalLogger logger = InternalLoggerFactory.getInstance(FastThreadLocalThread.class);

    /**
     * Set of thread IDs that are treated like {@link FastThreadLocalThread}.
     */
    private static final AtomicReference<FallbackThreadSet> fallbackThreads =
            new AtomicReference<>(FallbackThreadSet.EMPTY);

    // This will be set to true if we have a chance to wrap the Runnable.
    private final boolean cleanupFastThreadLocals;

    private InternalThreadLocalMap threadLocalMap;

    public FastThreadLocalThread() {
        cleanupFastThreadLocals = false;
    }

    public FastThreadLocalThread(Runnable target) {
        super(FastThreadLocalRunnable.wrap(target));
        cleanupFastThreadLocals = true;
    }

    public FastThreadLocalThread(ThreadGroup group, Runnable target) {
        super(group, FastThreadLocalRunnable.wrap(target));
        cleanupFastThreadLocals = true;
    }

    public FastThreadLocalThread(String name) {
        super(name);
        cleanupFastThreadLocals = false;
    }
// ... (197 more lines)