/*
* Copyright 2013 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:
*
* http://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 io.netty.util.
Recycler;
import io.netty.util.internal.
PlatformDependent;
import java.io.
IOException;
import java.io.
InputStream;
import java.io.
OutputStream;
import java.nio.
ByteBuffer;
import java.nio.channels.
ClosedChannelException;
import java.nio.channels.
FileChannel;
import java.nio.channels.
GatheringByteChannel;
import java.nio.channels.
ScatteringByteChannel;
final class
PooledUnsafeDirectByteBuf extends
PooledByteBuf<
ByteBuffer> {
private static final
Recycler<
PooledUnsafeDirectByteBuf>
RECYCLER = new
Recycler<
PooledUnsafeDirectByteBuf>() {
@
Override
protected
PooledUnsafeDirectByteBuf newObject(
Handle<
PooledUnsafeDirectByteBuf>
handle) {
return new
PooledUnsafeDirectByteBuf(
handle, 0);
}
};
static
PooledUnsafeDirectByteBuf newInstance(int
maxCapacity) {
PooledUnsafeDirectByteBuf buf =
RECYCLER.
get();
buf.
reuse(
maxCapacity);
return
buf;
}
private long
memoryAddress;
private
PooledUnsafeDirectByteBuf(
Recycler.
Handle<
PooledUnsafeDirectByteBuf>
recyclerHandle, int
maxCapacity) {
super(
recyclerHandle,
maxCapacity);
}
@
Override
void
init(
PoolChunk<
ByteBuffer>
chunk, long
handle, int
offset, int
length, int
maxLength,
PoolThreadCache cache) {
super.init(
chunk,
handle,
offset,
length,
maxLength,
cache);
initMemoryAddress();
}
@
Override
void
initUnpooled(
PoolChunk<
ByteBuffer>
chunk, int
length) {
super.initUnpooled(
chunk,
length);
initMemoryAddress();
}
private void
initMemoryAddress() {
memoryAddress =
PlatformDependent.
directBufferAddress(
memory) +
offset;
}
@
Override
protected
ByteBuffer newInternalNioBuffer(
ByteBuffer memory) {
return
memory.
duplicate();
}
@
Override
public boolean
isDirect() {
return true;
}
@
Override
protected byte
_getByte(int
index) {
return
UnsafeByteBufUtil.
getByte(
addr(
index));
}
@
Override
protected short
_getShort(int
index) {
return
UnsafeByteBufUtil.
getShort(
addr(
index));
}
@
Override
protected short
_getShortLE(int
index) {
return
UnsafeByteBufUtil.
getShortLE(
addr(
index));
}
@
Override
protected int
_getUnsignedMedium(int
index) {
return
UnsafeByteBufUtil.
getUnsignedMedium(
addr(
index));
}
@
Override
protected int
_getUnsignedMediumLE(int
index) {
return
UnsafeByteBufUtil.
getUnsignedMediumLE(
addr(
index));
}
@
Override
protected int
_getInt(int
index) {
return
UnsafeByteBufUtil.
getInt(
addr(
index));
}
@
Override
protected int
_getIntLE(int
index) {
return
UnsafeByteBufUtil.
getIntLE(
addr(
index));
}
@
Override
protected long
_getLong(int
index) {
return
UnsafeByteBufUtil.
getLong(
addr(
index));
}
@
Override
protected long
_getLongLE(int
index) {
return
UnsafeByteBufUtil.
getLongLE(
addr(
index));
}
@
Override
public
ByteBuf getBytes(int
index,
ByteBuf dst, int
dstIndex, int
length) {
UnsafeByteBufUtil.
getBytes(this,
addr(
index),
index,
dst,
dstIndex,
length);
return this;
}
@
Override
public
ByteBuf getBytes(int
index, byte[]
dst, int
dstIndex, int
length) {
UnsafeByteBufUtil.
getBytes(this,
addr(
index),
index,
dst,
dstIndex,
length);
return this;
}
@
Override
public
ByteBuf getBytes(int
index,
ByteBuffer dst) {
UnsafeByteBufUtil.
getBytes(this,
addr(
index),
index,
dst);
return this;
}
@
Override
public
ByteBuf readBytes(
ByteBuffer dst) {
int
length =
dst.
remaining();
checkReadableBytes(
length);
getBytes(
readerIndex,
dst);
readerIndex +=
length;
return this;
}
@
Override
public
ByteBuf getBytes(int
index,
OutputStream out, int
length) throws
IOException {
UnsafeByteBufUtil.
getBytes(this,
addr(
index),
index,
out,
length);
return this;
}
@
Override
public int
getBytes(int
index,
GatheringByteChannel out, int
length) throws
IOException {
return
getBytes(
index,
out,
length, false);
}
private int
getBytes(int
index,
GatheringByteChannel out, int
length, boolean
internal) throws
IOException {
checkIndex(
index,
length);
if (
length == 0) {
return 0;
}
ByteBuffer tmpBuf;
if (
internal) {
tmpBuf =
internalNioBuffer();
} else {
tmpBuf =
memory.
duplicate();
}
index =
idx(
index);
tmpBuf.
clear().
position(
index).
limit(
index +
length);
return
out.
write(
tmpBuf);
}
@
Override
public int
getBytes(int
index,
FileChannel out, long
position, int
length) throws
IOException {
return
getBytes(
index,
out,
position,
length, false);
}
private int
getBytes(int
index,
FileChannel out, long
position, int
length, boolean
internal) throws
IOException {
checkIndex(
index,
length);
if (
length == 0) {
return 0;
}
ByteBuffer tmpBuf =
internal ?
internalNioBuffer() :
memory.
duplicate();
index =
idx(
index);
tmpBuf.
clear().
position(
index).
limit(
index +
length);
return
out.
write(
tmpBuf,
position);
}
@
Override
public int
readBytes(
GatheringByteChannel out, int
length)
throws
IOException {
checkReadableBytes(
length);
int
readBytes =
getBytes(
readerIndex,
out,
length, true);
readerIndex +=
readBytes;
return
readBytes;
}
@
Override
public int
readBytes(
FileChannel out, long
position, int
length)
throws
IOException {
checkReadableBytes(
length);
int
readBytes =
getBytes(
readerIndex,
out,
position,
length, true);
readerIndex +=
readBytes;
return
readBytes;
}
@
Override
protected void
_setByte(int
index, int
value) {
UnsafeByteBufUtil.
setByte(
addr(
index), (byte)
value);
}
@
Override
protected void
_setShort(int
index, int
value) {
UnsafeByteBufUtil.
setShort(
addr(
index),
value);
}
@
Override
protected void
_setShortLE(int
index, int
value) {
UnsafeByteBufUtil.
setShortLE(
addr(
index),
value);
}
@
Override
protected void
_setMedium(int
index, int
value) {
UnsafeByteBufUtil.
setMedium(
addr(
index),
value);
}
@
Override
protected void
_setMediumLE(int
index, int
value) {
UnsafeByteBufUtil.
setMediumLE(
addr(
index),
value);
}
@
Override
protected void
_setInt(int
index, int
value) {
UnsafeByteBufUtil.
setInt(
addr(
index),
value);
}
@
Override
protected void
_setIntLE(int
index, int
value) {
UnsafeByteBufUtil.
setIntLE(
addr(
index),
value);
}
@
Override
protected void
_setLong(int
index, long
value) {
UnsafeByteBufUtil.
setLong(
addr(
index),
value);
}
@
Override
protected void
_setLongLE(int
index, long
value) {
UnsafeByteBufUtil.
setLongLE(
addr(
index),
value);
}
@
Override
public
ByteBuf setBytes(int
index,
ByteBuf src, int
srcIndex, int
length) {
UnsafeByteBufUtil.
setBytes(this,
addr(
index),
index,
src,
srcIndex,
length);
return this;
}
@
Override
public
ByteBuf setBytes(int
index, byte[]
src, int
srcIndex, int
length) {
UnsafeByteBufUtil.
setBytes(this,
addr(
index),
index,
src,
srcIndex,
length);
return this;
}
@
Override
public
ByteBuf setBytes(int
index,
ByteBuffer src) {
UnsafeByteBufUtil.
setBytes(this,
addr(
index),
index,
src);
return this;
}
@
Override
public int
setBytes(int
index,
InputStream in, int
length) throws
IOException {
return
UnsafeByteBufUtil.
setBytes(this,
addr(
index),
index,
in,
length);
}
@
Override
public int
setBytes(int
index,
ScatteringByteChannel in, int
length) throws
IOException {
checkIndex(
index,
length);
ByteBuffer tmpBuf =
internalNioBuffer();
index =
idx(
index);
tmpBuf.
clear().
position(
index).
limit(
index +
length);
try {
return
in.
read(
tmpBuf);
} catch (
ClosedChannelException ignored) {
return -1;
}
}
@
Override
public int
setBytes(int
index,
FileChannel in, long
position, int
length) throws
IOException {
checkIndex(
index,
length);
ByteBuffer tmpBuf =
internalNioBuffer();
index =
idx(
index);
tmpBuf.
clear().
position(
index).
limit(
index +
length);
try {
return
in.
read(
tmpBuf,
position);
} catch (
ClosedChannelException ignored) {
return -1;
}
}
@
Override
public
ByteBuf copy(int
index, int
length) {
return
UnsafeByteBufUtil.
copy(this,
addr(
index),
index,
length);
}
@
Override
public int
nioBufferCount() {
return 1;
}
@
Override
public
ByteBuffer[]
nioBuffers(int
index, int
length) {
return new
ByteBuffer[] {
nioBuffer(
index,
length) };
}
@
Override
public
ByteBuffer nioBuffer(int
index, int
length) {
checkIndex(
index,
length);
index =
idx(
index);
return ((
ByteBuffer)
memory.
duplicate().
position(
index).
limit(
index +
length)).
slice();
}
@
Override
public
ByteBuffer internalNioBuffer(int
index, int
length) {
checkIndex(
index,
length);
index =
idx(
index);
return (
ByteBuffer)
internalNioBuffer().
clear().
position(
index).
limit(
index +
length);
}
@
Override
public boolean
hasArray() {
return false;
}
@
Override
public byte[]
array() {
throw new
UnsupportedOperationException("direct buffer");
}
@
Override
public int
arrayOffset() {
throw new
UnsupportedOperationException("direct buffer");
}
@
Override
public boolean
hasMemoryAddress() {
return true;
}
@
Override
public long
memoryAddress() {
ensureAccessible();
return
memoryAddress;
}
private long
addr(int
index) {
return
memoryAddress +
index;
}
@
Override
protected
SwappedByteBuf newSwappedByteBuf() {
if (
PlatformDependent.
isUnaligned()) {
// Only use if unaligned access is supported otherwise there is no gain.
return new
UnsafeDirectSwappedByteBuf(this);
}
return super.newSwappedByteBuf();
}
@
Override
public
ByteBuf setZero(int
index, int
length) {
checkIndex(
index,
length);
UnsafeByteBufUtil.
setZero(
addr(
index),
length);
return this;
}
@
Override
public
ByteBuf writeZero(int
length) {
ensureWritable(
length);
int
wIndex =
writerIndex;
UnsafeByteBufUtil.
setZero(
addr(
wIndex),
length);
writerIndex =
wIndex +
length;
return this;
}
}