1221 lines
38 KiB
Java
1221 lines
38 KiB
Java
/*
|
|
* Copyright 2020 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.api.memseg;
|
|
|
|
import io.netty.buffer.api.AllocatorControl;
|
|
import io.netty.buffer.api.Buffer;
|
|
import io.netty.buffer.api.BufferAllocator;
|
|
import io.netty.buffer.api.BufferReadOnlyException;
|
|
import io.netty.buffer.api.ByteCursor;
|
|
import io.netty.buffer.api.Drop;
|
|
import io.netty.buffer.api.Owned;
|
|
import io.netty.buffer.api.ReadableComponent;
|
|
import io.netty.buffer.api.ReadableComponentProcessor;
|
|
import io.netty.buffer.api.WritableComponent;
|
|
import io.netty.buffer.api.WritableComponentProcessor;
|
|
import io.netty.buffer.api.adaptor.BufferIntegratable;
|
|
import io.netty.buffer.api.internal.AdaptableBuffer;
|
|
import io.netty.buffer.api.internal.ArcDrop;
|
|
import io.netty.buffer.api.internal.Statics;
|
|
import jdk.incubator.foreign.MemorySegment;
|
|
import jdk.incubator.foreign.ResourceScope;
|
|
|
|
import java.nio.ByteBuffer;
|
|
import java.nio.ByteOrder;
|
|
|
|
import static io.netty.buffer.api.internal.Statics.bufferIsClosed;
|
|
import static io.netty.buffer.api.internal.Statics.bufferIsReadOnly;
|
|
import static jdk.incubator.foreign.MemoryAccess.getByteAtOffset;
|
|
import static jdk.incubator.foreign.MemoryAccess.getCharAtOffset;
|
|
import static jdk.incubator.foreign.MemoryAccess.getDoubleAtOffset;
|
|
import static jdk.incubator.foreign.MemoryAccess.getFloatAtOffset;
|
|
import static jdk.incubator.foreign.MemoryAccess.getIntAtOffset;
|
|
import static jdk.incubator.foreign.MemoryAccess.getLongAtOffset;
|
|
import static jdk.incubator.foreign.MemoryAccess.getShortAtOffset;
|
|
import static jdk.incubator.foreign.MemoryAccess.setByteAtOffset;
|
|
import static jdk.incubator.foreign.MemoryAccess.setCharAtOffset;
|
|
import static jdk.incubator.foreign.MemoryAccess.setDoubleAtOffset;
|
|
import static jdk.incubator.foreign.MemoryAccess.setFloatAtOffset;
|
|
import static jdk.incubator.foreign.MemoryAccess.setIntAtOffset;
|
|
import static jdk.incubator.foreign.MemoryAccess.setLongAtOffset;
|
|
import static jdk.incubator.foreign.MemoryAccess.setShortAtOffset;
|
|
|
|
class MemSegBuffer extends AdaptableBuffer<MemSegBuffer> implements Buffer, ReadableComponent,
|
|
WritableComponent, BufferIntegratable {
|
|
private static final MemorySegment CLOSED_SEGMENT;
|
|
private static final MemorySegment ZERO_OFFHEAP_SEGMENT;
|
|
private static final MemorySegment ZERO_ONHEAP_SEGMENT;
|
|
static final Drop<MemSegBuffer> SEGMENT_CLOSE;
|
|
|
|
static {
|
|
try (ResourceScope scope = ResourceScope.newSharedScope()) {
|
|
// We are not allowed to allocate a zero-sized native buffer, but we *can* take a zero-sized slice from it.
|
|
// We need the CLOSED_SEGMENT to have a size of zero, because we'll use its size for bounds checks after
|
|
// the buffer is closed.
|
|
MemorySegment segment = MemorySegment.allocateNative(1, scope);
|
|
CLOSED_SEGMENT = segment.asSlice(0, 0);
|
|
}
|
|
ZERO_OFFHEAP_SEGMENT = MemorySegment.allocateNative(1, ResourceScope.newImplicitScope()).asSlice(0, 0);
|
|
ZERO_ONHEAP_SEGMENT = MemorySegment.ofArray(new byte[0]);
|
|
SEGMENT_CLOSE = new Drop<MemSegBuffer>() {
|
|
@Override
|
|
public void drop(MemSegBuffer buf) {
|
|
ResourceScope scope = buf.base.scope();
|
|
if (!scope.isImplicit()) {
|
|
scope.close();
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public String toString() {
|
|
return "SEGMENT_CLOSE";
|
|
}
|
|
};
|
|
}
|
|
|
|
private final AllocatorControl control;
|
|
private MemorySegment base;
|
|
private MemorySegment seg;
|
|
private MemorySegment wseg;
|
|
private ByteOrder order;
|
|
private int roff;
|
|
private int woff;
|
|
private boolean constBuffer;
|
|
|
|
MemSegBuffer(MemorySegment base, MemorySegment view, Drop<MemSegBuffer> drop, AllocatorControl control) {
|
|
super(new MakeInaccisbleOnDrop(ArcDrop.wrap(drop)));
|
|
this.control = control;
|
|
this.base = base;
|
|
seg = view;
|
|
wseg = view;
|
|
order = ByteOrder.BIG_ENDIAN;
|
|
}
|
|
|
|
/**
|
|
* Constructor for {@linkplain BufferAllocator#constBufferSupplier(byte[]) const buffers}.
|
|
*/
|
|
MemSegBuffer(MemSegBuffer parent) {
|
|
super(new MakeInaccisbleOnDrop(new ArcDrop<>(ArcDrop.acquire(parent.unsafeGetDrop()))));
|
|
control = parent.control;
|
|
base = parent.base;
|
|
seg = parent.seg;
|
|
wseg = parent.wseg;
|
|
order = parent.order;
|
|
roff = parent.roff;
|
|
woff = parent.woff;
|
|
constBuffer = true;
|
|
}
|
|
|
|
private static final class MakeInaccisbleOnDrop implements Drop<MemSegBuffer> {
|
|
final Drop<MemSegBuffer> delegate;
|
|
|
|
private MakeInaccisbleOnDrop(Drop<MemSegBuffer> delegate) {
|
|
this.delegate = delegate;
|
|
}
|
|
|
|
@Override
|
|
public void drop(MemSegBuffer buf) {
|
|
try {
|
|
delegate.drop(buf);
|
|
} finally {
|
|
buf.makeInaccessible();
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public void attach(MemSegBuffer buf) {
|
|
delegate.attach(buf);
|
|
}
|
|
|
|
@Override
|
|
public String toString() {
|
|
return "MemSegDrop(" + delegate + ')';
|
|
}
|
|
}
|
|
|
|
@Override
|
|
protected Drop<MemSegBuffer> unsafeGetDrop() {
|
|
MakeInaccisbleOnDrop drop = (MakeInaccisbleOnDrop) super.unsafeGetDrop();
|
|
return drop.delegate;
|
|
}
|
|
|
|
@Override
|
|
protected void unsafeSetDrop(Drop<MemSegBuffer> replacement) {
|
|
super.unsafeSetDrop(new MakeInaccisbleOnDrop(replacement));
|
|
}
|
|
|
|
@Override
|
|
public String toString() {
|
|
return "Buffer[roff:" + roff + ", woff:" + woff + ", cap:" + seg.byteSize() + ']';
|
|
}
|
|
|
|
@Override
|
|
protected RuntimeException createResourceClosedException() {
|
|
return bufferIsClosed(this);
|
|
}
|
|
|
|
@Override
|
|
public int capacity() {
|
|
return (int) seg.byteSize();
|
|
}
|
|
|
|
@Override
|
|
public int readerOffset() {
|
|
return roff;
|
|
}
|
|
|
|
@Override
|
|
public MemSegBuffer readerOffset(int offset) {
|
|
checkRead(offset, 0);
|
|
roff = offset;
|
|
return this;
|
|
}
|
|
|
|
@Override
|
|
public int writerOffset() {
|
|
return woff;
|
|
}
|
|
|
|
@Override
|
|
public MemSegBuffer writerOffset(int offset) {
|
|
checkWrite(offset, 0);
|
|
woff = offset;
|
|
return this;
|
|
}
|
|
|
|
@Override
|
|
public Buffer fill(byte value) {
|
|
if (!isAccessible()) {
|
|
throw bufferIsClosed(this);
|
|
}
|
|
checkSet(0, capacity());
|
|
seg.fill(value);
|
|
return this;
|
|
}
|
|
|
|
// <editor-fold defaultstate="collapsed" desc="Readable/WritableComponent implementation.">
|
|
@Override
|
|
public boolean hasReadableArray() {
|
|
return false;
|
|
}
|
|
|
|
@Override
|
|
public byte[] readableArray() {
|
|
throw new UnsupportedOperationException("This component has no backing array.");
|
|
}
|
|
|
|
@Override
|
|
public int readableArrayOffset() {
|
|
throw new UnsupportedOperationException("This component has no backing array.");
|
|
}
|
|
|
|
@Override
|
|
public int readableArrayLength() {
|
|
throw new UnsupportedOperationException("This component has no backing array.");
|
|
}
|
|
|
|
@Override
|
|
public long readableNativeAddress() {
|
|
return nativeAddress();
|
|
}
|
|
|
|
@Override
|
|
public ByteBuffer readableBuffer() {
|
|
var buffer = seg.asByteBuffer();
|
|
buffer = buffer.asReadOnlyBuffer();
|
|
buffer = buffer.position(readerOffset()).limit(readerOffset() + readableBytes());
|
|
return buffer.order(order);
|
|
}
|
|
|
|
@Override
|
|
public boolean hasWritableArray() {
|
|
return false;
|
|
}
|
|
|
|
@Override
|
|
public byte[] writableArray() {
|
|
throw new UnsupportedOperationException("This component has no backing array.");
|
|
}
|
|
|
|
@Override
|
|
public int writableArrayOffset() {
|
|
throw new UnsupportedOperationException("This component has no backing array.");
|
|
}
|
|
|
|
@Override
|
|
public int writableArrayLength() {
|
|
throw new UnsupportedOperationException("This component has no backing array.");
|
|
}
|
|
|
|
@Override
|
|
public long writableNativeAddress() {
|
|
return nativeAddress();
|
|
}
|
|
|
|
@Override
|
|
public ByteBuffer writableBuffer() {
|
|
var buffer = wseg.asByteBuffer();
|
|
buffer = buffer.position(writerOffset()).limit(writerOffset() + writableBytes());
|
|
return buffer.order(order);
|
|
}
|
|
// </editor-fold>
|
|
|
|
@Override
|
|
public long nativeAddress() {
|
|
if (!isAccessible()) {
|
|
throw bufferIsClosed(this);
|
|
}
|
|
if (seg.isNative()) {
|
|
return seg.address().toRawLongValue();
|
|
}
|
|
return 0; // This is a heap segment.
|
|
}
|
|
|
|
@Override
|
|
public Buffer makeReadOnly() {
|
|
wseg = CLOSED_SEGMENT;
|
|
return this;
|
|
}
|
|
|
|
@Override
|
|
public boolean readOnly() {
|
|
return wseg == CLOSED_SEGMENT && seg != CLOSED_SEGMENT;
|
|
}
|
|
|
|
@Override
|
|
public Buffer copy(int offset, int length) {
|
|
checkGet(offset, length);
|
|
if (length < 0) {
|
|
throw new IllegalArgumentException("Length cannot be negative: " + length + '.');
|
|
}
|
|
|
|
if (length == 0) {
|
|
// Special case zero-length segments, since allocators don't support allocating empty buffers.
|
|
final MemorySegment zero;
|
|
if (nativeAddress() == 0) {
|
|
zero = ZERO_ONHEAP_SEGMENT;
|
|
} else {
|
|
zero = ZERO_OFFHEAP_SEGMENT;
|
|
}
|
|
return new MemSegBuffer(zero, zero, Statics.noOpDrop(), control);
|
|
}
|
|
|
|
AllocatorControl.UntetheredMemory memory = control.allocateUntethered(this, length);
|
|
MemorySegment segment = memory.memory();
|
|
Buffer copy = new MemSegBuffer(segment, segment, memory.drop(), control);
|
|
copyInto(offset, copy, 0, length);
|
|
copy.writerOffset(length);
|
|
if (readOnly()) {
|
|
copy = copy.makeReadOnly();
|
|
}
|
|
return copy;
|
|
}
|
|
|
|
@Override
|
|
public void copyInto(int srcPos, byte[] dest, int destPos, int length) {
|
|
copyInto(srcPos, MemorySegment.ofArray(dest), destPos, length);
|
|
}
|
|
|
|
@Override
|
|
public void copyInto(int srcPos, ByteBuffer dest, int destPos, int length) {
|
|
copyInto(srcPos, MemorySegment.ofByteBuffer(dest.duplicate().clear()), destPos, length);
|
|
}
|
|
|
|
private void copyInto(int srcPos, MemorySegment dest, int destPos, int length) {
|
|
if (seg == CLOSED_SEGMENT) {
|
|
throw bufferIsClosed(this);
|
|
}
|
|
if (srcPos < 0) {
|
|
throw new IllegalArgumentException("The srcPos cannot be negative: " + srcPos + '.');
|
|
}
|
|
if (length < 0) {
|
|
throw new IllegalArgumentException("The length cannot be negative: " + length + '.');
|
|
}
|
|
if (seg.byteSize() < srcPos + length) {
|
|
throw new IllegalArgumentException("The srcPos + length is beyond the end of the buffer: " +
|
|
"srcPos = " + srcPos + ", length = " + length + '.');
|
|
}
|
|
dest.asSlice(destPos, length).copyFrom(seg.asSlice(srcPos, length));
|
|
}
|
|
|
|
@Override
|
|
public void copyInto(int srcPos, Buffer dest, int destPos, int length) {
|
|
if (dest instanceof MemSegBuffer memSegBuf) {
|
|
memSegBuf.checkSet(destPos, length);
|
|
copyInto(srcPos, memSegBuf.seg, destPos, length);
|
|
return;
|
|
}
|
|
|
|
Statics.copyToViaReverseLoop(this, srcPos, dest, destPos, length);
|
|
}
|
|
|
|
@Override
|
|
public ByteCursor openCursor() {
|
|
return openCursor(readerOffset(), readableBytes());
|
|
}
|
|
|
|
@Override
|
|
public ByteCursor openCursor(int fromOffset, int length) {
|
|
if (seg == CLOSED_SEGMENT) {
|
|
throw bufferIsClosed(this);
|
|
}
|
|
if (fromOffset < 0) {
|
|
throw new IllegalArgumentException("The fromOffset cannot be negative: " + fromOffset + '.');
|
|
}
|
|
if (length < 0) {
|
|
throw new IllegalArgumentException("The length cannot be negative: " + length + '.');
|
|
}
|
|
if (seg.byteSize() < fromOffset + length) {
|
|
throw new IllegalArgumentException("The fromOffset + length is beyond the end of the buffer: " +
|
|
"fromOffset = " + fromOffset + ", length = " + length + '.');
|
|
}
|
|
return new ByteCursor() {
|
|
final MemorySegment segment = seg;
|
|
int index = fromOffset;
|
|
final int end = index + length;
|
|
long longValue = -1;
|
|
byte byteValue = -1;
|
|
|
|
public boolean readLong() {
|
|
if (index + Long.BYTES <= end) {
|
|
longValue = getLongAtOffset(segment, index, ByteOrder.BIG_ENDIAN);
|
|
index += Long.BYTES;
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
public long getLong() {
|
|
return longValue;
|
|
}
|
|
|
|
@Override
|
|
public boolean readByte() {
|
|
if (index < end) {
|
|
byteValue = getByteAtOffset(segment, index);
|
|
index++;
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
@Override
|
|
public byte getByte() {
|
|
return byteValue;
|
|
}
|
|
|
|
@Override
|
|
public int currentOffset() {
|
|
return index;
|
|
}
|
|
|
|
@Override
|
|
public int bytesLeft() {
|
|
return end - index;
|
|
}
|
|
};
|
|
}
|
|
|
|
@Override
|
|
public ByteCursor openReverseCursor() {
|
|
int woff = writerOffset();
|
|
return openReverseCursor(woff == 0? 0 : woff - 1, readableBytes());
|
|
}
|
|
|
|
@Override
|
|
public ByteCursor openReverseCursor(int fromOffset, int length) {
|
|
if (seg == CLOSED_SEGMENT) {
|
|
throw bufferIsClosed(this);
|
|
}
|
|
if (fromOffset < 0) {
|
|
throw new IllegalArgumentException("The fromOffset cannot be negative: " + fromOffset + '.');
|
|
}
|
|
if (length < 0) {
|
|
throw new IllegalArgumentException("The length cannot be negative: " + length + '.');
|
|
}
|
|
if (seg.byteSize() <= fromOffset) {
|
|
throw new IllegalArgumentException("The fromOffset is beyond the end of the buffer: " + fromOffset + '.');
|
|
}
|
|
if (fromOffset - length < -1) {
|
|
throw new IllegalArgumentException("The fromOffset - length would underflow the buffer: " +
|
|
"fromOffset = " + fromOffset + ", length = " + length + '.');
|
|
}
|
|
return new ByteCursor() {
|
|
final MemorySegment segment = seg;
|
|
int index = fromOffset;
|
|
final int end = index - length;
|
|
long longValue = -1;
|
|
byte byteValue = -1;
|
|
|
|
public boolean readLong() {
|
|
if (index - Long.BYTES >= end) {
|
|
index -= 7;
|
|
longValue = getLongAtOffset(segment, index, ByteOrder.LITTLE_ENDIAN);
|
|
index--;
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
public long getLong() {
|
|
return longValue;
|
|
}
|
|
|
|
@Override
|
|
public boolean readByte() {
|
|
if (index > end) {
|
|
byteValue = getByteAtOffset(segment, index);
|
|
index--;
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
@Override
|
|
public byte getByte() {
|
|
return byteValue;
|
|
}
|
|
|
|
@Override
|
|
public int currentOffset() {
|
|
return index;
|
|
}
|
|
|
|
@Override
|
|
public int bytesLeft() {
|
|
return index - end;
|
|
}
|
|
};
|
|
}
|
|
|
|
@Override
|
|
public Buffer ensureWritable(int size, int minimumGrowth, boolean allowCompaction) {
|
|
if (!isAccessible()) {
|
|
throw bufferIsClosed(this);
|
|
}
|
|
if (!isOwned()) {
|
|
throw attachTrace(new IllegalStateException(
|
|
"Buffer is not owned. Only owned buffers can call ensureWritable."));
|
|
}
|
|
if (size < 0) {
|
|
throw new IllegalArgumentException("Cannot ensure writable for a negative size: " + size + '.');
|
|
}
|
|
if (minimumGrowth < 0) {
|
|
throw new IllegalArgumentException("The minimum growth cannot be negative: " + minimumGrowth + '.');
|
|
}
|
|
if (seg != wseg) {
|
|
throw bufferIsReadOnly(this);
|
|
}
|
|
if (writableBytes() >= size) {
|
|
// We already have enough space.
|
|
return this;
|
|
}
|
|
|
|
if (allowCompaction && writableBytes() + readerOffset() >= size) {
|
|
// We can solve this with compaction.
|
|
return compact();
|
|
}
|
|
|
|
// Allocate a bigger buffer.
|
|
long newSize = capacity() + (long) Math.max(size - writableBytes(), minimumGrowth);
|
|
Statics.assertValidBufferSize(newSize);
|
|
var untethered = control.allocateUntethered(this, (int) newSize);
|
|
MemorySegment newSegment = untethered.memory();
|
|
|
|
// Copy contents.
|
|
newSegment.copyFrom(seg);
|
|
|
|
// Release the old memory segment and install the new one:
|
|
Drop<MemSegBuffer> drop = untethered.drop();
|
|
disconnectDrop(drop);
|
|
attachNewMemorySegment(newSegment, drop);
|
|
return this;
|
|
}
|
|
|
|
private void disconnectDrop(Drop<MemSegBuffer> newDrop) {
|
|
var drop = unsafeGetDrop();
|
|
// Disconnect from the current arc drop, since we'll get our own fresh memory segment.
|
|
int roff = this.roff;
|
|
int woff = this.woff;
|
|
drop.drop(this);
|
|
unsafeSetDrop(new ArcDrop<>(newDrop));
|
|
this.roff = roff;
|
|
this.woff = woff;
|
|
}
|
|
|
|
private void attachNewMemorySegment(MemorySegment newSegment, Drop<MemSegBuffer> drop) {
|
|
base = newSegment;
|
|
seg = newSegment;
|
|
wseg = newSegment;
|
|
constBuffer = false;
|
|
drop.attach(this);
|
|
}
|
|
|
|
@Override
|
|
public Buffer split(int splitOffset) {
|
|
if (splitOffset < 0) {
|
|
throw new IllegalArgumentException("The split offset cannot be negative: " + splitOffset + '.');
|
|
}
|
|
if (capacity() < splitOffset) {
|
|
throw new IllegalArgumentException("The split offset cannot be greater than the buffer capacity, " +
|
|
"but the split offset was " + splitOffset + ", and capacity is " + capacity() + '.');
|
|
}
|
|
if (!isAccessible()) {
|
|
throw attachTrace(bufferIsClosed(this));
|
|
}
|
|
if (!isOwned()) {
|
|
throw attachTrace(new IllegalStateException("Cannot split a buffer that is not owned."));
|
|
}
|
|
var drop = (ArcDrop<MemSegBuffer>) unsafeGetDrop();
|
|
unsafeSetDrop(new ArcDrop<>(drop));
|
|
var splitSegment = seg.asSlice(0, splitOffset);
|
|
var splitBuffer = new MemSegBuffer(base, splitSegment, new ArcDrop<>(drop.increment()), control);
|
|
splitBuffer.woff = Math.min(woff, splitOffset);
|
|
splitBuffer.roff = Math.min(roff, splitOffset);
|
|
boolean readOnly = readOnly();
|
|
if (readOnly) {
|
|
splitBuffer.makeReadOnly();
|
|
}
|
|
// Split preserves const-state.
|
|
splitBuffer.constBuffer = constBuffer;
|
|
seg = seg.asSlice(splitOffset, seg.byteSize() - splitOffset);
|
|
if (!readOnly) {
|
|
wseg = seg;
|
|
}
|
|
woff = Math.max(woff, splitOffset) - splitOffset;
|
|
roff = Math.max(roff, splitOffset) - splitOffset;
|
|
return splitBuffer;
|
|
}
|
|
|
|
@Override
|
|
public Buffer compact() {
|
|
if (!isOwned()) {
|
|
throw attachTrace(new IllegalStateException("Buffer must be owned in order to compact."));
|
|
}
|
|
if (readOnly()) {
|
|
throw new BufferReadOnlyException("Buffer must be writable in order to compact, but was read-only.");
|
|
}
|
|
int distance = roff;
|
|
if (distance == 0) {
|
|
return this;
|
|
}
|
|
seg.copyFrom(seg.asSlice(roff, woff - roff));
|
|
roff -= distance;
|
|
woff -= distance;
|
|
return this;
|
|
}
|
|
|
|
@Override
|
|
public int countComponents() {
|
|
return 1;
|
|
}
|
|
|
|
@Override
|
|
public int countReadableComponents() {
|
|
return readableBytes() > 0? 1 : 0;
|
|
}
|
|
|
|
@Override
|
|
public int countWritableComponents() {
|
|
return writableBytes() > 0? 1 : 0;
|
|
}
|
|
|
|
@Override
|
|
public <E extends Exception> int forEachReadable(int initialIndex, ReadableComponentProcessor<E> processor)
|
|
throws E {
|
|
checkRead(readerOffset(), Math.max(1, readableBytes()));
|
|
return processor.process(initialIndex, this)? 1 : -1;
|
|
}
|
|
|
|
@Override
|
|
public <E extends Exception> int forEachWritable(int initialIndex, WritableComponentProcessor<E> processor)
|
|
throws E {
|
|
checkWrite(writerOffset(), Math.max(1, writableBytes()));
|
|
return processor.process(initialIndex, this)? 1 : -1;
|
|
}
|
|
|
|
// <editor-fold defaultstate="collapsed" desc="Primitive accessors implementation.">
|
|
@Override
|
|
public byte readByte() {
|
|
checkRead(roff, Byte.BYTES);
|
|
byte value = getByteAtOffset(seg, roff);
|
|
roff += Byte.BYTES;
|
|
return value;
|
|
}
|
|
|
|
@Override
|
|
public byte getByte(int roff) {
|
|
checkGet(roff, Byte.BYTES);
|
|
return getByteAtOffset(seg, roff);
|
|
}
|
|
|
|
@Override
|
|
public int readUnsignedByte() {
|
|
checkRead(roff, Byte.BYTES);
|
|
int value = getByteAtOffset(seg, roff) & 0xFF;
|
|
roff += Byte.BYTES;
|
|
return value;
|
|
}
|
|
|
|
@Override
|
|
public int getUnsignedByte(int roff) {
|
|
checkGet(roff, Byte.BYTES);
|
|
return getByteAtOffset(seg, roff) & 0xFF;
|
|
}
|
|
|
|
@Override
|
|
public Buffer writeByte(byte value) {
|
|
try {
|
|
setByteAtOffset(wseg, woff, value);
|
|
woff += Byte.BYTES;
|
|
return this;
|
|
} catch (IndexOutOfBoundsException e) {
|
|
throw checkWriteState(e);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public Buffer setByte(int woff, byte value) {
|
|
try {
|
|
setByteAtOffset(wseg, woff, value);
|
|
return this;
|
|
} catch (IndexOutOfBoundsException e) {
|
|
throw checkWriteState(e);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public Buffer writeUnsignedByte(int value) {
|
|
try {
|
|
setByteAtOffset(wseg, woff, (byte) (value & 0xFF));
|
|
woff += Byte.BYTES;
|
|
return this;
|
|
} catch (IndexOutOfBoundsException e) {
|
|
throw checkWriteState(e);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public Buffer setUnsignedByte(int woff, int value) {
|
|
try {
|
|
setByteAtOffset(wseg, woff, (byte) (value & 0xFF));
|
|
return this;
|
|
} catch (IndexOutOfBoundsException e) {
|
|
throw checkWriteState(e);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public char readChar() {
|
|
checkRead(roff, 2);
|
|
char value = getCharAtOffset(seg, roff, order);
|
|
roff += 2;
|
|
return value;
|
|
}
|
|
|
|
@Override
|
|
public char getChar(int roff) {
|
|
checkGet(roff, 2);
|
|
return getCharAtOffset(seg, roff, order);
|
|
}
|
|
|
|
@Override
|
|
public Buffer writeChar(char value) {
|
|
try {
|
|
setCharAtOffset(wseg, woff, order, value);
|
|
woff += 2;
|
|
return this;
|
|
} catch (IndexOutOfBoundsException e) {
|
|
throw checkWriteState(e);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public Buffer setChar(int woff, char value) {
|
|
try {
|
|
setCharAtOffset(wseg, woff, order, value);
|
|
return this;
|
|
} catch (IndexOutOfBoundsException e) {
|
|
throw checkWriteState(e);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public short readShort() {
|
|
checkRead(roff, Short.BYTES);
|
|
short value = getShortAtOffset(seg, roff, order);
|
|
roff += Short.BYTES;
|
|
return value;
|
|
}
|
|
|
|
@Override
|
|
public short getShort(int roff) {
|
|
checkGet(roff, Short.BYTES);
|
|
return getShortAtOffset(seg, roff, order);
|
|
}
|
|
|
|
@Override
|
|
public int readUnsignedShort() {
|
|
checkRead(roff, Short.BYTES);
|
|
int value = getShortAtOffset(seg, roff, order) & 0xFFFF;
|
|
roff += Short.BYTES;
|
|
return value;
|
|
}
|
|
|
|
@Override
|
|
public int getUnsignedShort(int roff) {
|
|
checkGet(roff, Short.BYTES);
|
|
return getShortAtOffset(seg, roff, order) & 0xFFFF;
|
|
}
|
|
|
|
@Override
|
|
public Buffer writeShort(short value) {
|
|
try {
|
|
setShortAtOffset(wseg, woff, order, value);
|
|
woff += Short.BYTES;
|
|
return this;
|
|
} catch (IndexOutOfBoundsException e) {
|
|
throw checkWriteState(e);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public Buffer setShort(int woff, short value) {
|
|
try {
|
|
setShortAtOffset(wseg, woff, order, value);
|
|
return this;
|
|
} catch (IndexOutOfBoundsException e) {
|
|
throw checkWriteState(e);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public Buffer writeUnsignedShort(int value) {
|
|
try {
|
|
setShortAtOffset(wseg, woff, order, (short) (value & 0xFFFF));
|
|
woff += Short.BYTES;
|
|
return this;
|
|
} catch (IndexOutOfBoundsException e) {
|
|
throw checkWriteState(e);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public Buffer setUnsignedShort(int woff, int value) {
|
|
try {
|
|
setShortAtOffset(wseg, woff, order, (short) (value & 0xFFFF));
|
|
return this;
|
|
} catch (IndexOutOfBoundsException e) {
|
|
throw checkWriteState(e);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public int readMedium() {
|
|
checkRead(roff, 3);
|
|
int value = order == ByteOrder.BIG_ENDIAN?
|
|
getByteAtOffset(seg, roff) << 16 |
|
|
(getByteAtOffset(seg, roff + 1) & 0xFF) << 8 |
|
|
getByteAtOffset(seg, roff + 2) & 0xFF :
|
|
getByteAtOffset(seg, roff) & 0xFF |
|
|
(getByteAtOffset(seg, roff + 1) & 0xFF) << 8 |
|
|
getByteAtOffset(seg, roff + 2) << 16;
|
|
roff += 3;
|
|
return value;
|
|
}
|
|
|
|
@Override
|
|
public int getMedium(int roff) {
|
|
checkGet(roff, 3);
|
|
return order == ByteOrder.BIG_ENDIAN?
|
|
getByteAtOffset(seg, roff) << 16 |
|
|
(getByteAtOffset(seg, roff + 1) & 0xFF) << 8 |
|
|
getByteAtOffset(seg, roff + 2) & 0xFF :
|
|
getByteAtOffset(seg, roff) & 0xFF |
|
|
(getByteAtOffset(seg, roff + 1) & 0xFF) << 8 |
|
|
getByteAtOffset(seg, roff + 2) << 16;
|
|
}
|
|
|
|
@Override
|
|
public int readUnsignedMedium() {
|
|
checkRead(roff, 3);
|
|
int value = order == ByteOrder.BIG_ENDIAN?
|
|
(getByteAtOffset(seg, roff) << 16 |
|
|
(getByteAtOffset(seg, roff + 1) & 0xFF) << 8 |
|
|
getByteAtOffset(seg, roff + 2) & 0xFF) & 0xFFFFFF :
|
|
(getByteAtOffset(seg, roff) & 0xFF |
|
|
(getByteAtOffset(seg, roff + 1) & 0xFF) << 8 |
|
|
getByteAtOffset(seg, roff + 2) << 16) & 0xFFFFFF;
|
|
roff += 3;
|
|
return value;
|
|
}
|
|
|
|
@Override
|
|
public int getUnsignedMedium(int roff) {
|
|
checkGet(roff, 3);
|
|
return order == ByteOrder.BIG_ENDIAN?
|
|
(getByteAtOffset(seg, roff) << 16 |
|
|
(getByteAtOffset(seg, roff + 1) & 0xFF) << 8 |
|
|
getByteAtOffset(seg, roff + 2) & 0xFF) & 0xFFFFFF :
|
|
(getByteAtOffset(seg, roff) & 0xFF |
|
|
(getByteAtOffset(seg, roff + 1) & 0xFF) << 8 |
|
|
getByteAtOffset(seg, roff + 2) << 16) & 0xFFFFFF;
|
|
}
|
|
|
|
@Override
|
|
public Buffer writeMedium(int value) {
|
|
checkWrite(woff, 3);
|
|
if (order == ByteOrder.BIG_ENDIAN) {
|
|
setByteAtOffset(wseg, woff, (byte) (value >> 16));
|
|
setByteAtOffset(wseg, woff + 1, (byte) (value >> 8 & 0xFF));
|
|
setByteAtOffset(wseg, woff + 2, (byte) (value & 0xFF));
|
|
} else {
|
|
setByteAtOffset(wseg, woff, (byte) (value & 0xFF));
|
|
setByteAtOffset(wseg, woff + 1, (byte) (value >> 8 & 0xFF));
|
|
setByteAtOffset(wseg, woff + 2, (byte) (value >> 16 & 0xFF));
|
|
}
|
|
woff += 3;
|
|
return this;
|
|
}
|
|
|
|
@Override
|
|
public Buffer setMedium(int woff, int value) {
|
|
checkSet(woff, 3);
|
|
if (order == ByteOrder.BIG_ENDIAN) {
|
|
setByteAtOffset(wseg, woff, (byte) (value >> 16));
|
|
setByteAtOffset(wseg, woff + 1, (byte) (value >> 8 & 0xFF));
|
|
setByteAtOffset(wseg, woff + 2, (byte) (value & 0xFF));
|
|
} else {
|
|
setByteAtOffset(wseg, woff, (byte) (value & 0xFF));
|
|
setByteAtOffset(wseg, woff + 1, (byte) (value >> 8 & 0xFF));
|
|
setByteAtOffset(wseg, woff + 2, (byte) (value >> 16 & 0xFF));
|
|
}
|
|
return this;
|
|
}
|
|
|
|
@Override
|
|
public Buffer writeUnsignedMedium(int value) {
|
|
checkWrite(woff, 3);
|
|
if (order == ByteOrder.BIG_ENDIAN) {
|
|
setByteAtOffset(wseg, woff, (byte) (value >> 16));
|
|
setByteAtOffset(wseg, woff + 1, (byte) (value >> 8 & 0xFF));
|
|
setByteAtOffset(wseg, woff + 2, (byte) (value & 0xFF));
|
|
} else {
|
|
setByteAtOffset(wseg, woff, (byte) (value & 0xFF));
|
|
setByteAtOffset(wseg, woff + 1, (byte) (value >> 8 & 0xFF));
|
|
setByteAtOffset(wseg, woff + 2, (byte) (value >> 16 & 0xFF));
|
|
}
|
|
woff += 3;
|
|
return this;
|
|
}
|
|
|
|
@Override
|
|
public Buffer setUnsignedMedium(int woff, int value) {
|
|
checkSet(woff, 3);
|
|
if (order == ByteOrder.BIG_ENDIAN) {
|
|
setByteAtOffset(wseg, woff, (byte) (value >> 16));
|
|
setByteAtOffset(wseg, woff + 1, (byte) (value >> 8 & 0xFF));
|
|
setByteAtOffset(wseg, woff + 2, (byte) (value & 0xFF));
|
|
} else {
|
|
setByteAtOffset(wseg, woff, (byte) (value & 0xFF));
|
|
setByteAtOffset(wseg, woff + 1, (byte) (value >> 8 & 0xFF));
|
|
setByteAtOffset(wseg, woff + 2, (byte) (value >> 16 & 0xFF));
|
|
}
|
|
return this;
|
|
}
|
|
|
|
@Override
|
|
public int readInt() {
|
|
checkRead(roff, Integer.BYTES);
|
|
int value = getIntAtOffset(seg, roff, order);
|
|
roff += Integer.BYTES;
|
|
return value;
|
|
}
|
|
|
|
@Override
|
|
public int getInt(int roff) {
|
|
checkGet(roff, Integer.BYTES);
|
|
return getIntAtOffset(seg, roff, order);
|
|
}
|
|
|
|
@Override
|
|
public long readUnsignedInt() {
|
|
checkRead(roff, Integer.BYTES);
|
|
long value = getIntAtOffset(seg, roff, order) & 0xFFFFFFFFL;
|
|
roff += Integer.BYTES;
|
|
return value;
|
|
}
|
|
|
|
@Override
|
|
public long getUnsignedInt(int roff) {
|
|
checkGet(roff, Integer.BYTES);
|
|
return getIntAtOffset(seg, roff, order) & 0xFFFFFFFFL;
|
|
}
|
|
|
|
@Override
|
|
public Buffer writeInt(int value) {
|
|
try {
|
|
setIntAtOffset(wseg, woff, order, value);
|
|
woff += Integer.BYTES;
|
|
return this;
|
|
} catch (IndexOutOfBoundsException e) {
|
|
throw checkWriteState(e);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public Buffer setInt(int woff, int value) {
|
|
try {
|
|
setIntAtOffset(wseg, woff, order, value);
|
|
return this;
|
|
} catch (IndexOutOfBoundsException e) {
|
|
throw checkWriteState(e);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public Buffer writeUnsignedInt(long value) {
|
|
try {
|
|
setIntAtOffset(wseg, woff, order, (int) (value & 0xFFFFFFFFL));
|
|
woff += Integer.BYTES;
|
|
return this;
|
|
} catch (IndexOutOfBoundsException e) {
|
|
throw checkWriteState(e);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public Buffer setUnsignedInt(int woff, long value) {
|
|
try {
|
|
setIntAtOffset(wseg, woff, order, (int) (value & 0xFFFFFFFFL));
|
|
return this;
|
|
} catch (IndexOutOfBoundsException e) {
|
|
throw checkWriteState(e);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public float readFloat() {
|
|
checkRead(roff, Float.BYTES);
|
|
float value = getFloatAtOffset(seg, roff, order);
|
|
roff += Float.BYTES;
|
|
return value;
|
|
}
|
|
|
|
@Override
|
|
public float getFloat(int roff) {
|
|
checkGet(roff, Float.BYTES);
|
|
return getFloatAtOffset(seg, roff, order);
|
|
}
|
|
|
|
@Override
|
|
public Buffer writeFloat(float value) {
|
|
try {
|
|
setFloatAtOffset(wseg, woff, order, value);
|
|
woff += Float.BYTES;
|
|
return this;
|
|
} catch (IndexOutOfBoundsException e) {
|
|
throw checkWriteState(e);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public Buffer setFloat(int woff, float value) {
|
|
try {
|
|
setFloatAtOffset(wseg, woff, order, value);
|
|
return this;
|
|
} catch (IndexOutOfBoundsException e) {
|
|
throw checkWriteState(e);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public long readLong() {
|
|
checkRead(roff, Long.BYTES);
|
|
long value = getLongAtOffset(seg, roff, order);
|
|
roff += Long.BYTES;
|
|
return value;
|
|
}
|
|
|
|
@Override
|
|
public long getLong(int roff) {
|
|
checkGet(roff, Long.BYTES);
|
|
return getLongAtOffset(seg, roff, order);
|
|
}
|
|
|
|
@Override
|
|
public Buffer writeLong(long value) {
|
|
try {
|
|
setLongAtOffset(wseg, woff, order, value);
|
|
woff += Long.BYTES;
|
|
return this;
|
|
} catch (IndexOutOfBoundsException e) {
|
|
throw checkWriteState(e);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public Buffer setLong(int woff, long value) {
|
|
try {
|
|
setLongAtOffset(wseg, woff, order, value);
|
|
return this;
|
|
} catch (IndexOutOfBoundsException e) {
|
|
throw checkWriteState(e);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public double readDouble() {
|
|
checkRead(roff, Double.BYTES);
|
|
double value = getDoubleAtOffset(seg, roff, order);
|
|
roff += Double.BYTES;
|
|
return value;
|
|
}
|
|
|
|
@Override
|
|
public double getDouble(int roff) {
|
|
checkGet(roff, Double.BYTES);
|
|
return getDoubleAtOffset(seg, roff, order);
|
|
}
|
|
|
|
@Override
|
|
public Buffer writeDouble(double value) {
|
|
try {
|
|
setDoubleAtOffset(wseg, woff, order, value);
|
|
woff += Double.BYTES;
|
|
return this;
|
|
} catch (IndexOutOfBoundsException e) {
|
|
throw checkWriteState(e);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public Buffer setDouble(int woff, double value) {
|
|
try {
|
|
setDoubleAtOffset(wseg, woff, order, value);
|
|
return this;
|
|
} catch (IndexOutOfBoundsException e) {
|
|
throw checkWriteState(e);
|
|
}
|
|
}
|
|
// </editor-fold>
|
|
|
|
@Override
|
|
protected Owned<MemSegBuffer> prepareSend() {
|
|
var order = this.order;
|
|
var roff = this.roff;
|
|
var woff = this.woff;
|
|
var readOnly = readOnly();
|
|
var isConst = constBuffer;
|
|
MemorySegment transferSegment = seg;
|
|
MemorySegment base = this.base;
|
|
makeInaccessible();
|
|
return new Owned<MemSegBuffer>() {
|
|
@Override
|
|
public MemSegBuffer transferOwnership(Drop<MemSegBuffer> drop) {
|
|
MemSegBuffer copy = new MemSegBuffer(base, transferSegment, drop, control);
|
|
copy.order = order;
|
|
copy.roff = roff;
|
|
copy.woff = woff;
|
|
if (readOnly) {
|
|
copy.makeReadOnly();
|
|
}
|
|
copy.constBuffer = isConst;
|
|
return copy;
|
|
}
|
|
};
|
|
}
|
|
|
|
void makeInaccessible() {
|
|
base = CLOSED_SEGMENT;
|
|
seg = CLOSED_SEGMENT;
|
|
wseg = CLOSED_SEGMENT;
|
|
roff = 0;
|
|
woff = 0;
|
|
}
|
|
|
|
@Override
|
|
public boolean isOwned() {
|
|
return super.isOwned() && ((ArcDrop<MemSegBuffer>) unsafeGetDrop()).isOwned();
|
|
}
|
|
|
|
@Override
|
|
public int countBorrows() {
|
|
return super.countBorrows() + ((ArcDrop<MemSegBuffer>) unsafeGetDrop()).countBorrows();
|
|
}
|
|
|
|
private void checkRead(int index, int size) {
|
|
if (index < 0 || woff < index + size) {
|
|
throw readAccessCheckException(index);
|
|
}
|
|
}
|
|
|
|
private void checkGet(int index, int size) {
|
|
if (index < 0 || seg.byteSize() < index + size) {
|
|
throw readAccessCheckException(index);
|
|
}
|
|
}
|
|
|
|
private void checkWrite(int index, int size) {
|
|
if (index < roff || wseg.byteSize() < index + size) {
|
|
throw writeAccessCheckException(index);
|
|
}
|
|
}
|
|
|
|
private void checkSet(int index, int size) {
|
|
if (index < 0 || wseg.byteSize() < index + size) {
|
|
throw writeAccessCheckException(index);
|
|
}
|
|
}
|
|
|
|
private RuntimeException checkWriteState(IndexOutOfBoundsException ioobe) {
|
|
if (seg == CLOSED_SEGMENT) {
|
|
return bufferIsClosed(this);
|
|
}
|
|
if (wseg != seg) {
|
|
return bufferIsReadOnly(this);
|
|
}
|
|
return ioobe;
|
|
}
|
|
|
|
private RuntimeException readAccessCheckException(int index) {
|
|
if (seg == CLOSED_SEGMENT) {
|
|
throw bufferIsClosed(this);
|
|
}
|
|
return outOfBounds(index);
|
|
}
|
|
|
|
private RuntimeException writeAccessCheckException(int index) {
|
|
if (seg == CLOSED_SEGMENT) {
|
|
throw bufferIsClosed(this);
|
|
}
|
|
if (wseg != seg) {
|
|
return bufferIsReadOnly(this);
|
|
}
|
|
return outOfBounds(index);
|
|
}
|
|
|
|
private IndexOutOfBoundsException outOfBounds(int index) {
|
|
return new IndexOutOfBoundsException(
|
|
"Index " + index + " is out of bounds: [read 0 to " + woff + ", write 0 to " +
|
|
seg.byteSize() + "].");
|
|
}
|
|
|
|
Object recoverableMemory() {
|
|
return base;
|
|
}
|
|
}
|