PooledByteBufAllocator.java — netty Source File

Source Code

/*
 * Copyright 2012 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.buffer;

import static io.netty.util.internal.ObjectUtil.checkPositiveOrZero;

import io.netty.util.NettyRuntime;
import io.netty.util.concurrent.EventExecutor;
import io.netty.util.concurrent.FastThreadLocal;
import io.netty.util.concurrent.FastThreadLocalThread;
import io.netty.util.internal.PlatformDependent;
import io.netty.util.internal.StringUtil;
import io.netty.util.internal.SystemPropertyUtil;
import io.netty.util.internal.ThreadExecutorMap;
import io.netty.util.internal.logging.InternalLogger;
import io.netty.util.internal.logging.InternalLoggerFactory;

import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.TimeUnit;

public class PooledByteBufAllocator extends AbstractByteBufAllocator implements ByteBufAllocatorMetricProvider {

    private static final InternalLogger logger = InternalLoggerFactory.getInstance(PooledByteBufAllocator.class);
    private static final int DEFAULT_NUM_HEAP_ARENA;
    private static final int DEFAULT_NUM_DIRECT_ARENA;

    private static final int DEFAULT_PAGE_SIZE;
    private static final int DEFAULT_MAX_ORDER; // 8192 << 9 = 4 MiB per chunk
    private static final int DEFAULT_SMALL_CACHE_SIZE;
    private static final int DEFAULT_NORMAL_CACHE_SIZE;
    static final int DEFAULT_MAX_CACHED_BUFFER_CAPACITY;
    private static final int DEFAULT_CACHE_TRIM_INTERVAL;
    private static final long DEFAULT_CACHE_TRIM_INTERVAL_MILLIS;
    private static final boolean DEFAULT_USE_CACHE_FOR_ALL_THREADS;
    private static final int DEFAULT_DIRECT_MEMORY_CACHE_ALIGNMENT;
    static final int DEFAULT_MAX_CACHED_BYTEBUFFERS_PER_CHUNK;
    private static final boolean DEFAULT_DISABLE_CACHE_FINALIZERS_FOR_FAST_THREAD_LOCAL_THREADS;

    private static final int MIN_PAGE_SIZE = 4096;
    private static final int MAX_CHUNK_SIZE = (int) (((long) Integer.MAX_VALUE + 1) / 2);

    private static final int CACHE_NOT_USED = 0;

// ... (800 more lines)