io.netty.buffer.UnsafeByteBufUtil Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
/*
* Copyright 2015 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 io.netty.util.internal.PlatformDependent;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.ReadOnlyBufferException;
import static io.netty.util.internal.MathUtil.isOutOfBounds;
import static io.netty.util.internal.ObjectUtil.checkNotNull;
import static io.netty.util.internal.PlatformDependent.BIG_ENDIAN_NATIVE_ORDER;
/**
* All operations get and set as {@link ByteOrder#BIG_ENDIAN}.
*/
final class UnsafeByteBufUtil {
private static final boolean UNALIGNED = PlatformDependent.isUnaligned();
private static final byte ZERO = 0;
private static final int MAX_HAND_ROLLED_SET_ZERO_BYTES = 64;
static byte getByte(long address) {
return PlatformDependent.getByte(address);
}
static short getShort(long address) {
if (UNALIGNED) {
short v = PlatformDependent.getShort(address);
return BIG_ENDIAN_NATIVE_ORDER ? v : Short.reverseBytes(v);
}
return (short) (PlatformDependent.getByte(address) << 8 | PlatformDependent.getByte(address + 1) & 0xff);
}
static short getShortLE(long address) {
if (UNALIGNED) {
short v = PlatformDependent.getShort(address);
return BIG_ENDIAN_NATIVE_ORDER ? Short.reverseBytes(v) : v;
}
return (short) (PlatformDependent.getByte(address) & 0xff | PlatformDependent.getByte(address + 1) << 8);
}
static int getUnsignedMedium(long address) {
if (UNALIGNED) {
return (PlatformDependent.getByte(address) & 0xff) << 16 |
(BIG_ENDIAN_NATIVE_ORDER ? PlatformDependent.getShort(address + 1)
: Short.reverseBytes(PlatformDependent.getShort(address + 1))) & 0xffff;
}
return (PlatformDependent.getByte(address) & 0xff) << 16 |
(PlatformDependent.getByte(address + 1) & 0xff) << 8 |
PlatformDependent.getByte(address + 2) & 0xff;
}
static int getUnsignedMediumLE(long address) {
if (UNALIGNED) {
return (PlatformDependent.getByte(address) & 0xff) |
((BIG_ENDIAN_NATIVE_ORDER ? Short.reverseBytes(PlatformDependent.getShort(address + 1))
: PlatformDependent.getShort(address + 1)) & 0xffff) << 8;
}
return PlatformDependent.getByte(address) & 0xff |
(PlatformDependent.getByte(address + 1) & 0xff) << 8 |
(PlatformDependent.getByte(address + 2) & 0xff) << 16;
}
static int getInt(long address) {
if (UNALIGNED) {
int v = PlatformDependent.getInt(address);
return BIG_ENDIAN_NATIVE_ORDER ? v : Integer.reverseBytes(v);
}
return PlatformDependent.getByte(address) << 24 |
(PlatformDependent.getByte(address + 1) & 0xff) << 16 |
(PlatformDependent.getByte(address + 2) & 0xff) << 8 |
PlatformDependent.getByte(address + 3) & 0xff;
}
static int getIntLE(long address) {
if (UNALIGNED) {
int v = PlatformDependent.getInt(address);
return BIG_ENDIAN_NATIVE_ORDER ? Integer.reverseBytes(v) : v;
}
return PlatformDependent.getByte(address) & 0xff |
(PlatformDependent.getByte(address + 1) & 0xff) << 8 |
(PlatformDependent.getByte(address + 2) & 0xff) << 16 |
PlatformDependent.getByte(address + 3) << 24;
}
static long getLong(long address) {
if (UNALIGNED) {
long v = PlatformDependent.getLong(address);
return BIG_ENDIAN_NATIVE_ORDER ? v : Long.reverseBytes(v);
}
return ((long) PlatformDependent.getByte(address)) << 56 |
(PlatformDependent.getByte(address + 1) & 0xffL) << 48 |
(PlatformDependent.getByte(address + 2) & 0xffL) << 40 |
(PlatformDependent.getByte(address + 3) & 0xffL) << 32 |
(PlatformDependent.getByte(address + 4) & 0xffL) << 24 |
(PlatformDependent.getByte(address + 5) & 0xffL) << 16 |
(PlatformDependent.getByte(address + 6) & 0xffL) << 8 |
(PlatformDependent.getByte(address + 7)) & 0xffL;
}
static long getLongLE(long address) {
if (UNALIGNED) {
long v = PlatformDependent.getLong(address);
return BIG_ENDIAN_NATIVE_ORDER ? Long.reverseBytes(v) : v;
}
return (PlatformDependent.getByte(address)) & 0xffL |
(PlatformDependent.getByte(address + 1) & 0xffL) << 8 |
(PlatformDependent.getByte(address + 2) & 0xffL) << 16 |
(PlatformDependent.getByte(address + 3) & 0xffL) << 24 |
(PlatformDependent.getByte(address + 4) & 0xffL) << 32 |
(PlatformDependent.getByte(address + 5) & 0xffL) << 40 |
(PlatformDependent.getByte(address + 6) & 0xffL) << 48 |
((long) PlatformDependent.getByte(address + 7)) << 56;
}
static void setByte(long address, int value) {
PlatformDependent.putByte(address, (byte) value);
}
static void setShort(long address, int value) {
if (UNALIGNED) {
PlatformDependent.putShort(
address, BIG_ENDIAN_NATIVE_ORDER ? (short) value : Short.reverseBytes((short) value));
} else {
PlatformDependent.putByte(address, (byte) (value >>> 8));
PlatformDependent.putByte(address + 1, (byte) value);
}
}
static void setShortLE(long address, int value) {
if (UNALIGNED) {
PlatformDependent.putShort(
address, BIG_ENDIAN_NATIVE_ORDER ? Short.reverseBytes((short) value) : (short) value);
} else {
PlatformDependent.putByte(address, (byte) value);
PlatformDependent.putByte(address + 1, (byte) (value >>> 8));
}
}
static void setMedium(long address, int value) {
PlatformDependent.putByte(address, (byte) (value >>> 16));
if (UNALIGNED) {
PlatformDependent.putShort(address + 1, BIG_ENDIAN_NATIVE_ORDER ? (short) value
: Short.reverseBytes((short) value));
} else {
PlatformDependent.putByte(address + 1, (byte) (value >>> 8));
PlatformDependent.putByte(address + 2, (byte) value);
}
}
static void setMediumLE(long address, int value) {
PlatformDependent.putByte(address, (byte) value);
if (UNALIGNED) {
PlatformDependent.putShort(address + 1, BIG_ENDIAN_NATIVE_ORDER ? Short.reverseBytes((short) (value >>> 8))
: (short) (value >>> 8));
} else {
PlatformDependent.putByte(address + 1, (byte) (value >>> 8));
PlatformDependent.putByte(address + 2, (byte) (value >>> 16));
}
}
static void setInt(long address, int value) {
if (UNALIGNED) {
PlatformDependent.putInt(address, BIG_ENDIAN_NATIVE_ORDER ? value : Integer.reverseBytes(value));
} else {
PlatformDependent.putByte(address, (byte) (value >>> 24));
PlatformDependent.putByte(address + 1, (byte) (value >>> 16));
PlatformDependent.putByte(address + 2, (byte) (value >>> 8));
PlatformDependent.putByte(address + 3, (byte) value);
}
}
static void setIntLE(long address, int value) {
if (UNALIGNED) {
PlatformDependent.putInt(address, BIG_ENDIAN_NATIVE_ORDER ? Integer.reverseBytes(value) : value);
} else {
PlatformDependent.putByte(address, (byte) value);
PlatformDependent.putByte(address + 1, (byte) (value >>> 8));
PlatformDependent.putByte(address + 2, (byte) (value >>> 16));
PlatformDependent.putByte(address + 3, (byte) (value >>> 24));
}
}
static void setLong(long address, long value) {
if (UNALIGNED) {
PlatformDependent.putLong(address, BIG_ENDIAN_NATIVE_ORDER ? value : Long.reverseBytes(value));
} else {
PlatformDependent.putByte(address, (byte) (value >>> 56));
PlatformDependent.putByte(address + 1, (byte) (value >>> 48));
PlatformDependent.putByte(address + 2, (byte) (value >>> 40));
PlatformDependent.putByte(address + 3, (byte) (value >>> 32));
PlatformDependent.putByte(address + 4, (byte) (value >>> 24));
PlatformDependent.putByte(address + 5, (byte) (value >>> 16));
PlatformDependent.putByte(address + 6, (byte) (value >>> 8));
PlatformDependent.putByte(address + 7, (byte) value);
}
}
static void setLongLE(long address, long value) {
if (UNALIGNED) {
PlatformDependent.putLong(address, BIG_ENDIAN_NATIVE_ORDER ? Long.reverseBytes(value) : value);
} else {
PlatformDependent.putByte(address, (byte) value);
PlatformDependent.putByte(address + 1, (byte) (value >>> 8));
PlatformDependent.putByte(address + 2, (byte) (value >>> 16));
PlatformDependent.putByte(address + 3, (byte) (value >>> 24));
PlatformDependent.putByte(address + 4, (byte) (value >>> 32));
PlatformDependent.putByte(address + 5, (byte) (value >>> 40));
PlatformDependent.putByte(address + 6, (byte) (value >>> 48));
PlatformDependent.putByte(address + 7, (byte) (value >>> 56));
}
}
static byte getByte(byte[] array, int index) {
return PlatformDependent.getByte(array, index);
}
static short getShort(byte[] array, int index) {
if (UNALIGNED) {
short v = PlatformDependent.getShort(array, index);
return BIG_ENDIAN_NATIVE_ORDER ? v : Short.reverseBytes(v);
}
return (short) (PlatformDependent.getByte(array, index) << 8 |
PlatformDependent.getByte(array, index + 1) & 0xff);
}
static short getShortLE(byte[] array, int index) {
if (UNALIGNED) {
short v = PlatformDependent.getShort(array, index);
return BIG_ENDIAN_NATIVE_ORDER ? Short.reverseBytes(v) : v;
}
return (short) (PlatformDependent.getByte(array, index) & 0xff |
PlatformDependent.getByte(array, index + 1) << 8);
}
static int getUnsignedMedium(byte[] array, int index) {
if (UNALIGNED) {
return (PlatformDependent.getByte(array, index) & 0xff) << 16 |
(BIG_ENDIAN_NATIVE_ORDER ? PlatformDependent.getShort(array, index + 1)
: Short.reverseBytes(PlatformDependent.getShort(array, index + 1)))
& 0xffff;
}
return (PlatformDependent.getByte(array, index) & 0xff) << 16 |
(PlatformDependent.getByte(array, index + 1) & 0xff) << 8 |
PlatformDependent.getByte(array, index + 2) & 0xff;
}
static int getUnsignedMediumLE(byte[] array, int index) {
if (UNALIGNED) {
return (PlatformDependent.getByte(array, index) & 0xff) |
((BIG_ENDIAN_NATIVE_ORDER ? Short.reverseBytes(PlatformDependent.getShort(array, index + 1))
: PlatformDependent.getShort(array, index + 1)) & 0xffff) << 8;
}
return PlatformDependent.getByte(array, index) & 0xff |
(PlatformDependent.getByte(array, index + 1) & 0xff) << 8 |
(PlatformDependent.getByte(array, index + 2) & 0xff) << 16;
}
static int getInt(byte[] array, int index) {
if (UNALIGNED) {
int v = PlatformDependent.getInt(array, index);
return BIG_ENDIAN_NATIVE_ORDER ? v : Integer.reverseBytes(v);
}
return PlatformDependent.getByte(array, index) << 24 |
(PlatformDependent.getByte(array, index + 1) & 0xff) << 16 |
(PlatformDependent.getByte(array, index + 2) & 0xff) << 8 |
PlatformDependent.getByte(array, index + 3) & 0xff;
}
static int getIntLE(byte[] array, int index) {
if (UNALIGNED) {
int v = PlatformDependent.getInt(array, index);
return BIG_ENDIAN_NATIVE_ORDER ? Integer.reverseBytes(v) : v;
}
return PlatformDependent.getByte(array, index) & 0xff |
(PlatformDependent.getByte(array, index + 1) & 0xff) << 8 |
(PlatformDependent.getByte(array, index + 2) & 0xff) << 16 |
PlatformDependent.getByte(array, index + 3) << 24;
}
static long getLong(byte[] array, int index) {
if (UNALIGNED) {
long v = PlatformDependent.getLong(array, index);
return BIG_ENDIAN_NATIVE_ORDER ? v : Long.reverseBytes(v);
}
return ((long) PlatformDependent.getByte(array, index)) << 56 |
(PlatformDependent.getByte(array, index + 1) & 0xffL) << 48 |
(PlatformDependent.getByte(array, index + 2) & 0xffL) << 40 |
(PlatformDependent.getByte(array, index + 3) & 0xffL) << 32 |
(PlatformDependent.getByte(array, index + 4) & 0xffL) << 24 |
(PlatformDependent.getByte(array, index + 5) & 0xffL) << 16 |
(PlatformDependent.getByte(array, index + 6) & 0xffL) << 8 |
(PlatformDependent.getByte(array, index + 7)) & 0xffL;
}
static long getLongLE(byte[] array, int index) {
if (UNALIGNED) {
long v = PlatformDependent.getLong(array, index);
return BIG_ENDIAN_NATIVE_ORDER ? Long.reverseBytes(v) : v;
}
return PlatformDependent.getByte(array, index) & 0xffL |
(PlatformDependent.getByte(array, index + 1) & 0xffL) << 8 |
(PlatformDependent.getByte(array, index + 2) & 0xffL) << 16 |
(PlatformDependent.getByte(array, index + 3) & 0xffL) << 24 |
(PlatformDependent.getByte(array, index + 4) & 0xffL) << 32 |
(PlatformDependent.getByte(array, index + 5) & 0xffL) << 40 |
(PlatformDependent.getByte(array, index + 6) & 0xffL) << 48 |
((long) PlatformDependent.getByte(array, index + 7)) << 56;
}
static void setByte(byte[] array, int index, int value) {
PlatformDependent.putByte(array, index, (byte) value);
}
static void setShort(byte[] array, int index, int value) {
if (UNALIGNED) {
PlatformDependent.putShort(array, index,
BIG_ENDIAN_NATIVE_ORDER ? (short) value : Short.reverseBytes((short) value));
} else {
PlatformDependent.putByte(array, index, (byte) (value >>> 8));
PlatformDependent.putByte(array, index + 1, (byte) value);
}
}
static void setShortLE(byte[] array, int index, int value) {
if (UNALIGNED) {
PlatformDependent.putShort(array, index,
BIG_ENDIAN_NATIVE_ORDER ? Short.reverseBytes((short) value) : (short) value);
} else {
PlatformDependent.putByte(array, index, (byte) value);
PlatformDependent.putByte(array, index + 1, (byte) (value >>> 8));
}
}
static void setMedium(byte[] array, int index, int value) {
PlatformDependent.putByte(array, index, (byte) (value >>> 16));
if (UNALIGNED) {
PlatformDependent.putShort(array, index + 1,
BIG_ENDIAN_NATIVE_ORDER ? (short) value
: Short.reverseBytes((short) value));
} else {
PlatformDependent.putByte(array, index + 1, (byte) (value >>> 8));
PlatformDependent.putByte(array, index + 2, (byte) value);
}
}
static void setMediumLE(byte[] array, int index, int value) {
PlatformDependent.putByte(array, index, (byte) value);
if (UNALIGNED) {
PlatformDependent.putShort(array, index + 1,
BIG_ENDIAN_NATIVE_ORDER ? Short.reverseBytes((short) (value >>> 8))
: (short) (value >>> 8));
} else {
PlatformDependent.putByte(array, index + 1, (byte) (value >>> 8));
PlatformDependent.putByte(array, index + 2, (byte) (value >>> 16));
}
}
static void setInt(byte[] array, int index, int value) {
if (UNALIGNED) {
PlatformDependent.putInt(array, index, BIG_ENDIAN_NATIVE_ORDER ? value : Integer.reverseBytes(value));
} else {
PlatformDependent.putByte(array, index, (byte) (value >>> 24));
PlatformDependent.putByte(array, index + 1, (byte) (value >>> 16));
PlatformDependent.putByte(array, index + 2, (byte) (value >>> 8));
PlatformDependent.putByte(array, index + 3, (byte) value);
}
}
static void setIntLE(byte[] array, int index, int value) {
if (UNALIGNED) {
PlatformDependent.putInt(array, index, BIG_ENDIAN_NATIVE_ORDER ? Integer.reverseBytes(value) : value);
} else {
PlatformDependent.putByte(array, index, (byte) value);
PlatformDependent.putByte(array, index + 1, (byte) (value >>> 8));
PlatformDependent.putByte(array, index + 2, (byte) (value >>> 16));
PlatformDependent.putByte(array, index + 3, (byte) (value >>> 24));
}
}
static void setLong(byte[] array, int index, long value) {
if (UNALIGNED) {
PlatformDependent.putLong(array, index, BIG_ENDIAN_NATIVE_ORDER ? value : Long.reverseBytes(value));
} else {
PlatformDependent.putByte(array, index, (byte) (value >>> 56));
PlatformDependent.putByte(array, index + 1, (byte) (value >>> 48));
PlatformDependent.putByte(array, index + 2, (byte) (value >>> 40));
PlatformDependent.putByte(array, index + 3, (byte) (value >>> 32));
PlatformDependent.putByte(array, index + 4, (byte) (value >>> 24));
PlatformDependent.putByte(array, index + 5, (byte) (value >>> 16));
PlatformDependent.putByte(array, index + 6, (byte) (value >>> 8));
PlatformDependent.putByte(array, index + 7, (byte) value);
}
}
static void setLongLE(byte[] array, int index, long value) {
if (UNALIGNED) {
PlatformDependent.putLong(array, index, BIG_ENDIAN_NATIVE_ORDER ? Long.reverseBytes(value) : value);
} else {
PlatformDependent.putByte(array, index, (byte) value);
PlatformDependent.putByte(array, index + 1, (byte) (value >>> 8));
PlatformDependent.putByte(array, index + 2, (byte) (value >>> 16));
PlatformDependent.putByte(array, index + 3, (byte) (value >>> 24));
PlatformDependent.putByte(array, index + 4, (byte) (value >>> 32));
PlatformDependent.putByte(array, index + 5, (byte) (value >>> 40));
PlatformDependent.putByte(array, index + 6, (byte) (value >>> 48));
PlatformDependent.putByte(array, index + 7, (byte) (value >>> 56));
}
}
private static void batchSetZero(byte[] data, int index, int length) {
int longBatches = length / 8;
for (int i = 0; i < longBatches; i++) {
PlatformDependent.putLong(data, index, ZERO);
index += 8;
}
final int remaining = length % 8;
for (int i = 0; i < remaining; i++) {
PlatformDependent.putByte(data, index + i, ZERO);
}
}
static void setZero(byte[] array, int index, int length) {
if (length == 0) {
return;
}
// fast-path for small writes to avoid thread-state change JDK's handling
if (UNALIGNED && length <= MAX_HAND_ROLLED_SET_ZERO_BYTES) {
batchSetZero(array, index, length);
} else {
PlatformDependent.setMemory(array, index, length, ZERO);
}
}
static ByteBuf copy(AbstractByteBuf buf, long addr, int index, int length) {
buf.checkIndex(index, length);
ByteBuf copy = buf.alloc().directBuffer(length, buf.maxCapacity());
if (length != 0) {
if (copy.hasMemoryAddress()) {
PlatformDependent.copyMemory(addr, copy.memoryAddress(), length);
copy.setIndex(0, length);
} else {
copy.writeBytes(buf, index, length);
}
}
return copy;
}
static int setBytes(AbstractByteBuf buf, long addr, int index, InputStream in, int length) throws IOException {
buf.checkIndex(index, length);
ByteBuf tmpBuf = buf.alloc().heapBuffer(length);
try {
byte[] tmp = tmpBuf.array();
int offset = tmpBuf.arrayOffset();
int readBytes = in.read(tmp, offset, length);
if (readBytes > 0) {
PlatformDependent.copyMemory(tmp, offset, addr, readBytes);
}
return readBytes;
} finally {
tmpBuf.release();
}
}
static void getBytes(AbstractByteBuf buf, long addr, int index, ByteBuf dst, int dstIndex, int length) {
buf.checkIndex(index, length);
checkNotNull(dst, "dst");
if (isOutOfBounds(dstIndex, length, dst.capacity())) {
throw new IndexOutOfBoundsException("dstIndex: " + dstIndex);
}
if (dst.hasMemoryAddress()) {
PlatformDependent.copyMemory(addr, dst.memoryAddress() + dstIndex, length);
} else if (dst.hasArray()) {
PlatformDependent.copyMemory(addr, dst.array(), dst.arrayOffset() + dstIndex, length);
} else {
dst.setBytes(dstIndex, buf, index, length);
}
}
static void getBytes(AbstractByteBuf buf, long addr, int index, byte[] dst, int dstIndex, int length) {
buf.checkIndex(index, length);
checkNotNull(dst, "dst");
if (isOutOfBounds(dstIndex, length, dst.length)) {
throw new IndexOutOfBoundsException("dstIndex: " + dstIndex);
}
if (length != 0) {
PlatformDependent.copyMemory(addr, dst, dstIndex, length);
}
}
static void getBytes(AbstractByteBuf buf, long addr, int index, ByteBuffer dst) {
buf.checkIndex(index, dst.remaining());
if (dst.remaining() == 0) {
return;
}
if (dst.isDirect()) {
if (dst.isReadOnly()) {
// We need to check if dst is ready-only so we not write something in it by using Unsafe.
throw new ReadOnlyBufferException();
}
// Copy to direct memory
long dstAddress = PlatformDependent.directBufferAddress(dst);
PlatformDependent.copyMemory(addr, dstAddress + dst.position(), dst.remaining());
dst.position(dst.position() + dst.remaining());
} else if (dst.hasArray()) {
// Copy to array
PlatformDependent.copyMemory(addr, dst.array(), dst.arrayOffset() + dst.position(), dst.remaining());
dst.position(dst.position() + dst.remaining());
} else {
dst.put(buf.nioBuffer());
}
}
static void setBytes(AbstractByteBuf buf, long addr, int index, ByteBuf src, int srcIndex, int length) {
buf.checkIndex(index, length);
checkNotNull(src, "src");
if (isOutOfBounds(srcIndex, length, src.capacity())) {
throw new IndexOutOfBoundsException("srcIndex: " + srcIndex);
}
if (length != 0) {
if (src.hasMemoryAddress()) {
PlatformDependent.copyMemory(src.memoryAddress() + srcIndex, addr, length);
} else if (src.hasArray()) {
PlatformDependent.copyMemory(src.array(), src.arrayOffset() + srcIndex, addr, length);
} else {
src.getBytes(srcIndex, buf, index, length);
}
}
}
static void setBytes(AbstractByteBuf buf, long addr, int index, byte[] src, int srcIndex, int length) {
buf.checkIndex(index, length);
// we need to check not null for src as it may cause the JVM crash
// See https://github.com/netty/netty/issues/10791
checkNotNull(src, "src");
if (isOutOfBounds(srcIndex, length, src.length)) {
throw new IndexOutOfBoundsException("srcIndex: " + srcIndex);
}
if (length != 0) {
PlatformDependent.copyMemory(src, srcIndex, addr, length);
}
}
static void setBytes(AbstractByteBuf buf, long addr, int index, ByteBuffer src) {
final int length = src.remaining();
if (length == 0) {
return;
}
if (src.isDirect()) {
buf.checkIndex(index, length);
// Copy from direct memory
long srcAddress = PlatformDependent.directBufferAddress(src);
PlatformDependent.copyMemory(srcAddress + src.position(), addr, length);
src.position(src.position() + length);
} else if (src.hasArray()) {
buf.checkIndex(index, length);
// Copy from array
PlatformDependent.copyMemory(src.array(), src.arrayOffset() + src.position(), addr, length);
src.position(src.position() + length);
} else {
if (length < 8) {
setSingleBytes(buf, addr, index, src, length);
} else {
//no need to checkIndex: internalNioBuffer is already taking care of it
assert buf.nioBufferCount() == 1;
final ByteBuffer internalBuffer = buf.internalNioBuffer(index, length);
internalBuffer.put(src);
}
}
}
private static void setSingleBytes(final AbstractByteBuf buf, final long addr, final int index,
final ByteBuffer src, final int length) {
buf.checkIndex(index, length);
final int srcPosition = src.position();
final int srcLimit = src.limit();
long dstAddr = addr;
for (int srcIndex = srcPosition; srcIndex < srcLimit; srcIndex++) {
final byte value = src.get(srcIndex);
PlatformDependent.putByte(dstAddr, value);
dstAddr++;
}
src.position(srcLimit);
}
static void getBytes(AbstractByteBuf buf, long addr, int index, OutputStream out, int length) throws IOException {
buf.checkIndex(index, length);
if (length != 0) {
int len = Math.min(length, ByteBufUtil.WRITE_CHUNK_SIZE);
if (len <= ByteBufUtil.MAX_TL_ARRAY_LEN || !buf.alloc().isDirectBufferPooled()) {
getBytes(addr, ByteBufUtil.threadLocalTempArray(len), 0, len, out, length);
} else {
// if direct buffers are pooled chances are good that heap buffers are pooled as well.
ByteBuf tmpBuf = buf.alloc().heapBuffer(len);
try {
byte[] tmp = tmpBuf.array();
int offset = tmpBuf.arrayOffset();
getBytes(addr, tmp, offset, len, out, length);
} finally {
tmpBuf.release();
}
}
}
}
private static void getBytes(long inAddr, byte[] in, int inOffset, int inLen, OutputStream out, int outLen)
throws IOException {
do {
int len = Math.min(inLen, outLen);
PlatformDependent.copyMemory(inAddr, in, inOffset, len);
out.write(in, inOffset, len);
outLen -= len;
inAddr += len;
} while (outLen > 0);
}
private static void batchSetZero(long addr, int length) {
int longBatches = length / 8;
for (int i = 0; i < longBatches; i++) {
PlatformDependent.putLong(addr, ZERO);
addr += 8;
}
final int remaining = length % 8;
for (int i = 0; i < remaining; i++) {
PlatformDependent.putByte(addr + i, ZERO);
}
}
static void setZero(long addr, int length) {
if (length == 0) {
return;
}
// fast-path for small writes to avoid thread-state change JDK's handling
if (length <= MAX_HAND_ROLLED_SET_ZERO_BYTES) {
if (!UNALIGNED) {
// write bytes until the address is aligned
int bytesToGetAligned = zeroTillAligned(addr, length);
addr += bytesToGetAligned;
length -= bytesToGetAligned;
if (length == 0) {
return;
}
assert addr % 8 == 0;
}
batchSetZero(addr, length);
} else {
PlatformDependent.setMemory(addr, length, ZERO);
}
}
private static int zeroTillAligned(long addr, int length) {
// write bytes until the address is aligned
int bytesToGetAligned = Math.min((int) (addr % 8), length);
for (int i = 0; i < bytesToGetAligned; i++) {
PlatformDependent.putByte(addr + i, ZERO);
}
return bytesToGetAligned;
}
static UnpooledUnsafeDirectByteBuf newUnsafeDirectByteBuf(
ByteBufAllocator alloc, int initialCapacity, int maxCapacity) {
if (PlatformDependent.useDirectBufferNoCleaner()) {
return new UnpooledUnsafeNoCleanerDirectByteBuf(alloc, initialCapacity, maxCapacity);
}
return new UnpooledUnsafeDirectByteBuf(alloc, initialCapacity, maxCapacity);
}
private UnsafeByteBufUtil() { }
}