181 lines
5.6 KiB
Java
181 lines
5.6 KiB
Java
/*
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* Copyright 2013 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty5.buffer;
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import static java.util.Objects.requireNonNull;
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import io.netty5.util.ResourceLeakDetector;
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import io.netty5.util.ResourceLeakTracker;
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import java.nio.ByteOrder;
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class SimpleLeakAwareByteBuf extends WrappedByteBuf {
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/**
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* This object's is associated with the {@link ResourceLeakTracker}. When {@link ResourceLeakTracker#close(Object)}
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* is called this object will be used as the argument. It is also assumed that this object is used when
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* {@link ResourceLeakDetector#track(Object)} is called to create {@link #leak}.
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*/
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private final ByteBuf trackedByteBuf;
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final ResourceLeakTracker<ByteBuf> leak;
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SimpleLeakAwareByteBuf(ByteBuf wrapped, ByteBuf trackedByteBuf, ResourceLeakTracker<ByteBuf> leak) {
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super(wrapped);
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this.trackedByteBuf = requireNonNull(trackedByteBuf, "trackedByteBuf");
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this.leak = requireNonNull(leak, "leak");
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}
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SimpleLeakAwareByteBuf(ByteBuf wrapped, ResourceLeakTracker<ByteBuf> leak) {
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this(wrapped, wrapped, leak);
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}
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@Override
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public ByteBuf slice() {
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return newSharedLeakAwareByteBuf(super.slice());
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}
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@Override
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public ByteBuf retainedSlice() {
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return unwrappedDerived(super.retainedSlice());
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}
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@Override
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public ByteBuf retainedSlice(int index, int length) {
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return unwrappedDerived(super.retainedSlice(index, length));
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}
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@Override
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public ByteBuf retainedDuplicate() {
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return unwrappedDerived(super.retainedDuplicate());
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}
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@Override
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public ByteBuf readRetainedSlice(int length) {
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return unwrappedDerived(super.readRetainedSlice(length));
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}
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@Override
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public ByteBuf slice(int index, int length) {
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return newSharedLeakAwareByteBuf(super.slice(index, length));
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}
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@Override
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public ByteBuf duplicate() {
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return newSharedLeakAwareByteBuf(super.duplicate());
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}
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@Override
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public ByteBuf readSlice(int length) {
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return newSharedLeakAwareByteBuf(super.readSlice(length));
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}
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@Override
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public ByteBuf asReadOnly() {
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return newSharedLeakAwareByteBuf(super.asReadOnly());
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}
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@Override
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public ByteBuf touch() {
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return this;
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}
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@Override
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public ByteBuf touch(Object hint) {
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return this;
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}
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@Override
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public boolean release() {
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if (super.release()) {
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closeLeak();
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return true;
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}
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return false;
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}
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@Override
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public boolean release(int decrement) {
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if (super.release(decrement)) {
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closeLeak();
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return true;
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}
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return false;
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}
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private void closeLeak() {
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// Close the ResourceLeakTracker with the tracked ByteBuf as argument. This must be the same that was used when
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// calling DefaultResourceLeak.track(...).
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boolean closed = leak.close(trackedByteBuf);
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assert closed;
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}
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@Override
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public ByteBuf order(ByteOrder endianness) {
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if (order() == endianness) {
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return this;
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} else {
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return newSharedLeakAwareByteBuf(super.order(endianness));
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}
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}
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private ByteBuf unwrappedDerived(ByteBuf derived) {
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// We only need to unwrap SwappedByteBuf implementations as these will be the only ones that may end up in
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// the AbstractLeakAwareByteBuf implementations beside slices / duplicates and "real" buffers.
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ByteBuf unwrappedDerived = unwrapSwapped(derived);
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if (unwrappedDerived instanceof AbstractPooledDerivedByteBuf) {
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// Update the parent to point to this buffer so we correctly close the ResourceLeakTracker.
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((AbstractPooledDerivedByteBuf) unwrappedDerived).parent(this);
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ResourceLeakTracker<ByteBuf> newLeak = AbstractByteBuf.leakDetector.track(derived);
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if (newLeak == null) {
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// No leak detection, just return the derived buffer.
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return derived;
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}
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return newLeakAwareByteBuf(derived, newLeak);
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}
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return newSharedLeakAwareByteBuf(derived);
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}
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@SuppressWarnings("deprecation")
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private static ByteBuf unwrapSwapped(ByteBuf buf) {
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if (buf instanceof SwappedByteBuf) {
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do {
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buf = buf.unwrap();
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} while (buf instanceof SwappedByteBuf);
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return buf;
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}
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return buf;
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}
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private SimpleLeakAwareByteBuf newSharedLeakAwareByteBuf(
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ByteBuf wrapped) {
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return newLeakAwareByteBuf(wrapped, trackedByteBuf, leak);
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}
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private SimpleLeakAwareByteBuf newLeakAwareByteBuf(
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ByteBuf wrapped, ResourceLeakTracker<ByteBuf> leakTracker) {
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return newLeakAwareByteBuf(wrapped, wrapped, leakTracker);
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}
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protected SimpleLeakAwareByteBuf newLeakAwareByteBuf(
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ByteBuf buf, ByteBuf trackedByteBuf, ResourceLeakTracker<ByteBuf> leakTracker) {
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return new SimpleLeakAwareByteBuf(buf, trackedByteBuf, leakTracker);
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}
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}
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