AbstractByteBufAllocator.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.ResourceLeakDetector;
import io.netty.util.ResourceLeakTracker;
import io.netty.util.internal.MathUtil;
import io.netty.util.internal.PlatformDependent;
import io.netty.util.internal.StringUtil;

/**
 * Skeletal {@link ByteBufAllocator} implementation to extend.
 */
public abstract class AbstractByteBufAllocator implements ByteBufAllocator {
    static final int DEFAULT_INITIAL_CAPACITY = 256;
    static final int DEFAULT_MAX_CAPACITY = Integer.MAX_VALUE;
    static final int DEFAULT_MAX_COMPONENTS = 16;
    static final int CALCULATE_THRESHOLD = 1048576 * 4; // 4 MiB page

    static {
        ResourceLeakDetector.addExclusions(AbstractByteBufAllocator.class, "toLeakAwareBuffer");
    }

    protected static ByteBuf toLeakAwareBuffer(ByteBuf buf) {
        ResourceLeakTracker<ByteBuf> leak = AbstractByteBuf.leakDetector.track(buf);
        if (leak != null) {
            if (AbstractByteBuf.leakDetector.isRecordEnabled()) {
                buf = new AdvancedLeakAwareByteBuf(buf, leak);
            } else {
                buf = new SimpleLeakAwareByteBuf(buf, leak);
            }
        }
        return buf;
    }

    protected static CompositeByteBuf toLeakAwareBuffer(CompositeByteBuf buf) {
        ResourceLeakTracker<ByteBuf> leak = AbstractByteBuf.leakDetector.track(buf);
        if (leak != null) {
            if (AbstractByteBuf.leakDetector.isRecordEnabled()) {
                buf = new AdvancedLeakAwareCompositeByteBuf(buf, leak);
            } else {
                buf = new SimpleLeakAwareCompositeByteBuf(buf, leak);
            }
        }
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