316 lines
9.1 KiB
Java
316 lines
9.1 KiB
Java
/*
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* Copyright 2012 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.net5.buffer;
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import io.net5.util.internal.PlatformDependent;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.nio.ByteBuffer;
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/**
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* A NIO {@link ByteBuffer} based buffer. It is recommended to use
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* {@link UnpooledByteBufAllocator#directBuffer(int, int)}, {@link Unpooled#directBuffer(int)} and
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* {@link Unpooled#wrappedBuffer(ByteBuffer)} instead of calling the constructor explicitly.}
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*/
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public class UnpooledUnsafeDirectByteBuf extends UnpooledDirectByteBuf {
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long memoryAddress;
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/**
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* Creates a new direct buffer.
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*
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* @param initialCapacity the initial capacity of the underlying direct buffer
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* @param maxCapacity the maximum capacity of the underlying direct buffer
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*/
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public UnpooledUnsafeDirectByteBuf(ByteBufAllocator alloc, int initialCapacity, int maxCapacity) {
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super(alloc, initialCapacity, maxCapacity);
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}
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/**
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* Creates a new direct buffer by wrapping the specified initial buffer.
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*
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* @param maxCapacity the maximum capacity of the underlying direct buffer
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*/
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protected UnpooledUnsafeDirectByteBuf(ByteBufAllocator alloc, ByteBuffer initialBuffer, int maxCapacity) {
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// We never try to free the buffer if it was provided by the end-user as we don't know if this is a duplicate or
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// a slice. This is done to prevent an IllegalArgumentException when using Java9 as Unsafe.invokeCleaner(...)
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// will check if the given buffer is either a duplicate or slice and in this case throw an
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// IllegalArgumentException.
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//
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// See https://hg.openjdk.java.net/jdk9/hs-demo/jdk/file/0d2ab72ba600/src/jdk.unsupported/share/classes/
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// sun/misc/Unsafe.java#l1250
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//
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// We also call slice() explicitly here to preserve behaviour with previous netty releases.
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super(alloc, initialBuffer, maxCapacity, /* doFree = */ false, /* slice = */ true);
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}
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UnpooledUnsafeDirectByteBuf(ByteBufAllocator alloc, ByteBuffer initialBuffer, int maxCapacity, boolean doFree) {
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super(alloc, initialBuffer, maxCapacity, doFree, false);
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}
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@Override
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final void setByteBuffer(ByteBuffer buffer, boolean tryFree) {
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super.setByteBuffer(buffer, tryFree);
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memoryAddress = PlatformDependent.directBufferAddress(buffer);
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}
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@Override
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public boolean hasMemoryAddress() {
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return true;
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}
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@Override
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public long memoryAddress() {
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ensureAccessible();
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return memoryAddress;
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}
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@Override
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public byte getByte(int index) {
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checkIndex(index);
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return _getByte(index);
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}
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@Override
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protected byte _getByte(int index) {
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return UnsafeByteBufUtil.getByte(addr(index));
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}
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@Override
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public short getShort(int index) {
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checkIndex(index, 2);
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return _getShort(index);
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}
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@Override
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protected short _getShort(int index) {
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return UnsafeByteBufUtil.getShort(addr(index));
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}
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@Override
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protected short _getShortLE(int index) {
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return UnsafeByteBufUtil.getShortLE(addr(index));
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}
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@Override
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public int getUnsignedMedium(int index) {
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checkIndex(index, 3);
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return _getUnsignedMedium(index);
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}
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@Override
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protected int _getUnsignedMedium(int index) {
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return UnsafeByteBufUtil.getUnsignedMedium(addr(index));
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}
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@Override
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protected int _getUnsignedMediumLE(int index) {
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return UnsafeByteBufUtil.getUnsignedMediumLE(addr(index));
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}
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@Override
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public int getInt(int index) {
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checkIndex(index, 4);
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return _getInt(index);
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}
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@Override
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protected int _getInt(int index) {
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return UnsafeByteBufUtil.getInt(addr(index));
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}
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@Override
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protected int _getIntLE(int index) {
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return UnsafeByteBufUtil.getIntLE(addr(index));
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}
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@Override
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public long getLong(int index) {
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checkIndex(index, 8);
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return _getLong(index);
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}
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@Override
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protected long _getLong(int index) {
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return UnsafeByteBufUtil.getLong(addr(index));
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}
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@Override
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protected long _getLongLE(int index) {
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return UnsafeByteBufUtil.getLongLE(addr(index));
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}
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@Override
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public ByteBuf getBytes(int index, ByteBuf dst, int dstIndex, int length) {
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UnsafeByteBufUtil.getBytes(this, addr(index), index, dst, dstIndex, length);
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return this;
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}
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@Override
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void getBytes(int index, byte[] dst, int dstIndex, int length, boolean internal) {
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UnsafeByteBufUtil.getBytes(this, addr(index), index, dst, dstIndex, length);
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}
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@Override
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void getBytes(int index, ByteBuffer dst, boolean internal) {
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UnsafeByteBufUtil.getBytes(this, addr(index), index, dst);
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}
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@Override
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public ByteBuf setByte(int index, int value) {
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checkIndex(index);
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_setByte(index, value);
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return this;
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}
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@Override
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protected void _setByte(int index, int value) {
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UnsafeByteBufUtil.setByte(addr(index), value);
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}
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@Override
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public ByteBuf setShort(int index, int value) {
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checkIndex(index, 2);
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_setShort(index, value);
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return this;
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}
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@Override
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protected void _setShort(int index, int value) {
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UnsafeByteBufUtil.setShort(addr(index), value);
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}
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@Override
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protected void _setShortLE(int index, int value) {
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UnsafeByteBufUtil.setShortLE(addr(index), value);
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}
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@Override
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public ByteBuf setMedium(int index, int value) {
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checkIndex(index, 3);
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_setMedium(index, value);
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return this;
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}
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@Override
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protected void _setMedium(int index, int value) {
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UnsafeByteBufUtil.setMedium(addr(index), value);
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}
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@Override
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protected void _setMediumLE(int index, int value) {
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UnsafeByteBufUtil.setMediumLE(addr(index), value);
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}
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@Override
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public ByteBuf setInt(int index, int value) {
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checkIndex(index, 4);
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_setInt(index, value);
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return this;
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}
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@Override
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protected void _setInt(int index, int value) {
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UnsafeByteBufUtil.setInt(addr(index), value);
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}
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@Override
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protected void _setIntLE(int index, int value) {
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UnsafeByteBufUtil.setIntLE(addr(index), value);
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}
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@Override
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public ByteBuf setLong(int index, long value) {
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checkIndex(index, 8);
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_setLong(index, value);
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return this;
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}
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@Override
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protected void _setLong(int index, long value) {
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UnsafeByteBufUtil.setLong(addr(index), value);
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}
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@Override
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protected void _setLongLE(int index, long value) {
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UnsafeByteBufUtil.setLongLE(addr(index), value);
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}
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@Override
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public ByteBuf setBytes(int index, ByteBuf src, int srcIndex, int length) {
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UnsafeByteBufUtil.setBytes(this, addr(index), index, src, srcIndex, length);
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return this;
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}
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@Override
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public ByteBuf setBytes(int index, byte[] src, int srcIndex, int length) {
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UnsafeByteBufUtil.setBytes(this, addr(index), index, src, srcIndex, length);
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return this;
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}
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@Override
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public ByteBuf setBytes(int index, ByteBuffer src) {
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UnsafeByteBufUtil.setBytes(this, addr(index), index, src);
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return this;
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}
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@Override
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void getBytes(int index, OutputStream out, int length, boolean internal) throws IOException {
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UnsafeByteBufUtil.getBytes(this, addr(index), index, out, length);
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}
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@Override
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public int setBytes(int index, InputStream in, int length) throws IOException {
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return UnsafeByteBufUtil.setBytes(this, addr(index), index, in, length);
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}
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@Override
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public ByteBuf copy(int index, int length) {
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return UnsafeByteBufUtil.copy(this, addr(index), index, length);
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}
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final long addr(int index) {
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return memoryAddress + index;
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}
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@Override
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protected SwappedByteBuf newSwappedByteBuf() {
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if (PlatformDependent.isUnaligned()) {
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// Only use if unaligned access is supported otherwise there is no gain.
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return new UnsafeDirectSwappedByteBuf(this);
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}
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return super.newSwappedByteBuf();
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}
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@Override
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public ByteBuf setZero(int index, int length) {
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checkIndex(index, length);
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UnsafeByteBufUtil.setZero(addr(index), length);
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return this;
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}
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@Override
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public ByteBuf writeZero(int length) {
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ensureWritable(length);
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int wIndex = writerIndex;
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UnsafeByteBufUtil.setZero(addr(wIndex), length);
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writerIndex = wIndex + length;
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return this;
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}
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}
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