JDK 17 java.base.jmod - Base Module
JDK 17 java.base.jmod is the JMOD file for JDK 17 Base module.
JDK 17 Base module compiled class files are stored in \fyicenter\jdk-17.0.5\jmods\java.base.jmod.
JDK 17 Base module compiled class files are also linked and stored in the \fyicenter\jdk-17.0.5\lib\modules JImage file.
JDK 17 Base module source code files are stored in \fyicenter\jdk-17.0.5\lib\src.zip\java.base.
You can click and view the content of each source code file in the list below.
✍: FYIcenter
⏎ java/nio/DirectByteBuffer.java
/*
* Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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// -- This file was mechanically generated: Do not edit! -- //
package java.nio;
import java.io.FileDescriptor;
import java.lang.ref.Reference;
import java.util.Objects;
import jdk.internal.access.foreign.MemorySegmentProxy;
import jdk.internal.misc.ScopedMemoryAccess.Scope;
import jdk.internal.misc.VM;
import jdk.internal.ref.Cleaner;
import sun.nio.ch.DirectBuffer;
class DirectByteBuffer
extends MappedByteBuffer
implements DirectBuffer
{
// Cached array base offset
private static final long ARRAY_BASE_OFFSET = UNSAFE.arrayBaseOffset(byte[].class);
// Cached unaligned-access capability
protected static final boolean UNALIGNED = Bits.unaligned();
// Base address, used in all indexing calculations
// NOTE: moved up to Buffer.java for speed in JNI GetDirectBufferAddress
// protected long address;
// An object attached to this buffer. If this buffer is a view of another
// buffer then we use this field to keep a reference to that buffer to
// ensure that its memory isn't freed before we are done with it.
private final Object att;
public Object attachment() {
return att;
}
private static class Deallocator
implements Runnable
{
private long address;
private long size;
private int capacity;
private Deallocator(long address, long size, int capacity) {
assert (address != 0);
this.address = address;
this.size = size;
this.capacity = capacity;
}
public void run() {
if (address == 0) {
// Paranoia
return;
}
UNSAFE.freeMemory(address);
address = 0;
Bits.unreserveMemory(size, capacity);
}
}
private final Cleaner cleaner;
public Cleaner cleaner() { return cleaner; }
// Primary constructor
//
DirectByteBuffer(int cap) { // package-private
super(-1, 0, cap, cap, null);
boolean pa = VM.isDirectMemoryPageAligned();
int ps = Bits.pageSize();
long size = Math.max(1L, (long)cap + (pa ? ps : 0));
Bits.reserveMemory(size, cap);
long base = 0;
try {
base = UNSAFE.allocateMemory(size);
} catch (OutOfMemoryError x) {
Bits.unreserveMemory(size, cap);
throw x;
}
UNSAFE.setMemory(base, size, (byte) 0);
if (pa && (base % ps != 0)) {
// Round up to page boundary
address = base + ps - (base & (ps - 1));
} else {
address = base;
}
cleaner = Cleaner.create(this, new Deallocator(base, size, cap));
att = null;
}
// Invoked to construct a direct ByteBuffer referring to the block of
// memory. A given arbitrary object may also be attached to the buffer.
//
DirectByteBuffer(long addr, int cap, Object ob, MemorySegmentProxy segment) {
super(-1, 0, cap, cap, segment);
address = addr;
cleaner = null;
att = ob;
}
// Invoked to construct a direct ByteBuffer referring to the block of
// memory. A given arbitrary object may also be attached to the buffer.
//
DirectByteBuffer(long addr, int cap, Object ob, FileDescriptor fd, boolean isSync, MemorySegmentProxy segment) {
super(-1, 0, cap, cap, fd, isSync, segment);
address = addr;
cleaner = null;
att = ob;
}
// Invoked only by JNI: NewDirectByteBuffer(void*, long)
//
private DirectByteBuffer(long addr, int cap) {
super(-1, 0, cap, cap, null);
address = addr;
cleaner = null;
att = null;
}
// For memory-mapped buffers -- invoked by FileChannelImpl via reflection
//
protected DirectByteBuffer(int cap, long addr,
FileDescriptor fd,
Runnable unmapper,
boolean isSync, MemorySegmentProxy segment)
{
super(-1, 0, cap, cap, fd, isSync, segment);
address = addr;
cleaner = Cleaner.create(this, unmapper);
att = null;
}
// For duplicates and slices
//
DirectByteBuffer(DirectBuffer db, // package-private
int mark, int pos, int lim, int cap, int off,
FileDescriptor fd, boolean isSync,
MemorySegmentProxy segment)
{
super(mark, pos, lim, cap,
fd, isSync,
segment);
address = ((Buffer)db).address + off;
cleaner = null;
Object attachment = db.attachment();
att = (attachment == null ? db : attachment);
}
@Override
Object base() {
return null;
}
public MappedByteBuffer slice() {
int pos = this.position();
int lim = this.limit();
int rem = (pos <= lim ? lim - pos : 0);
int off = (pos << 0);
assert (off >= 0);
return new DirectByteBuffer(this,
-1,
0,
rem,
rem,
off,
fileDescriptor(),
isSync(),
segment);
}
@Override
public MappedByteBuffer slice(int index, int length) {
Objects.checkFromIndexSize(index, length, limit());
return new DirectByteBuffer(this,
-1,
0,
length,
length,
index << 0,
fileDescriptor(),
isSync(),
segment);
}
public MappedByteBuffer duplicate() {
return new DirectByteBuffer(this,
this.markValue(),
this.position(),
this.limit(),
this.capacity(),
0,
fileDescriptor(),
isSync(),
segment);
}
public ByteBuffer asReadOnlyBuffer() {
return new DirectByteBufferR(this,
this.markValue(),
this.position(),
this.limit(),
this.capacity(),
0,
fileDescriptor(),
isSync(),
segment);
}
public long address() {
Scope scope = scope();
if (scope != null) {
if (scope.ownerThread() == null) {
throw new UnsupportedOperationException("ByteBuffer derived from shared segments not supported");
}
try {
scope.checkValidState();
} catch (Scope.ScopedAccessError e) {
throw new IllegalStateException("This segment is already closed");
}
}
return address;
}
private long ix(int i) {
return address + ((long)i << 0);
}
public byte get() {
try {
return ((SCOPED_MEMORY_ACCESS.getByte(scope(), null, ix(nextGetIndex()))));
} finally {
Reference.reachabilityFence(this);
}
}
public byte get(int i) {
try {
return ((SCOPED_MEMORY_ACCESS.getByte(scope(), null, ix(checkIndex(i)))));
} finally {
Reference.reachabilityFence(this);
}
}
public ByteBuffer put(byte x) {
try {
SCOPED_MEMORY_ACCESS.putByte(scope(), null, ix(nextPutIndex()), ((x)));
} finally {
Reference.reachabilityFence(this);
}
return this;
}
public ByteBuffer put(int i, byte x) {
try {
SCOPED_MEMORY_ACCESS.putByte(scope(), null, ix(checkIndex(i)), ((x)));
} finally {
Reference.reachabilityFence(this);
}
return this;
}
public MappedByteBuffer compact() {
int pos = position();
int lim = limit();
assert (pos <= lim);
int rem = (pos <= lim ? lim - pos : 0);
try {
// null is passed as destination Scope to avoid checking scope() twice
SCOPED_MEMORY_ACCESS.copyMemory(scope(), null, null,
ix(pos), null, ix(0), (long)rem << 0);
} finally {
Reference.reachabilityFence(this);
}
position(rem);
limit(capacity());
discardMark();
return this;
}
public boolean isDirect() {
return true;
}
public boolean isReadOnly() {
return false;
}
private char getChar(long a) {
try {
char x = SCOPED_MEMORY_ACCESS.getCharUnaligned(scope(), null, a, bigEndian);
return (x);
} finally {
Reference.reachabilityFence(this);
}
}
public char getChar() {
try {
return getChar(ix(nextGetIndex((1 << 1))));
} finally {
Reference.reachabilityFence(this);
}
}
public char getChar(int i) {
try {
return getChar(ix(checkIndex(i, (1 << 1))));
} finally {
Reference.reachabilityFence(this);
}
}
private ByteBuffer putChar(long a, char x) {
try {
char y = (x);
SCOPED_MEMORY_ACCESS.putCharUnaligned(scope(), null, a, y, bigEndian);
} finally {
Reference.reachabilityFence(this);
}
return this;
}
public ByteBuffer putChar(char x) {
putChar(ix(nextPutIndex((1 << 1))), x);
return this;
}
public ByteBuffer putChar(int i, char x) {
putChar(ix(checkIndex(i, (1 << 1))), x);
return this;
}
public CharBuffer asCharBuffer() {
int off = this.position();
int lim = this.limit();
assert (off <= lim);
int rem = (off <= lim ? lim - off : 0);
int size = rem >> 1;
if (!UNALIGNED && ((address + off) % (1 << 1) != 0)) {
return (bigEndian
? (CharBuffer)(new ByteBufferAsCharBufferB(this,
-1,
0,
size,
size,
address + off, segment))
: (CharBuffer)(new ByteBufferAsCharBufferL(this,
-1,
0,
size,
size,
address + off, segment)));
} else {
return (nativeByteOrder
? (CharBuffer)(new DirectCharBufferU(this,
-1,
0,
size,
size,
off, segment))
: (CharBuffer)(new DirectCharBufferS(this,
-1,
0,
size,
size,
off, segment)));
}
}
private short getShort(long a) {
try {
short x = SCOPED_MEMORY_ACCESS.getShortUnaligned(scope(), null, a, bigEndian);
return (x);
} finally {
Reference.reachabilityFence(this);
}
}
public short getShort() {
try {
return getShort(ix(nextGetIndex((1 << 1))));
} finally {
Reference.reachabilityFence(this);
}
}
public short getShort(int i) {
try {
return getShort(ix(checkIndex(i, (1 << 1))));
} finally {
Reference.reachabilityFence(this);
}
}
private ByteBuffer putShort(long a, short x) {
try {
short y = (x);
SCOPED_MEMORY_ACCESS.putShortUnaligned(scope(), null, a, y, bigEndian);
} finally {
Reference.reachabilityFence(this);
}
return this;
}
public ByteBuffer putShort(short x) {
putShort(ix(nextPutIndex((1 << 1))), x);
return this;
}
public ByteBuffer putShort(int i, short x) {
putShort(ix(checkIndex(i, (1 << 1))), x);
return this;
}
public ShortBuffer asShortBuffer() {
int off = this.position();
int lim = this.limit();
assert (off <= lim);
int rem = (off <= lim ? lim - off : 0);
int size = rem >> 1;
if (!UNALIGNED && ((address + off) % (1 << 1) != 0)) {
return (bigEndian
? (ShortBuffer)(new ByteBufferAsShortBufferB(this,
-1,
0,
size,
size,
address + off, segment))
: (ShortBuffer)(new ByteBufferAsShortBufferL(this,
-1,
0,
size,
size,
address + off, segment)));
} else {
return (nativeByteOrder
? (ShortBuffer)(new DirectShortBufferU(this,
-1,
0,
size,
size,
off, segment))
: (ShortBuffer)(new DirectShortBufferS(this,
-1,
0,
size,
size,
off, segment)));
}
}
private int getInt(long a) {
try {
int x = SCOPED_MEMORY_ACCESS.getIntUnaligned(scope(), null, a, bigEndian);
return (x);
} finally {
Reference.reachabilityFence(this);
}
}
public int getInt() {
try {
return getInt(ix(nextGetIndex((1 << 2))));
} finally {
Reference.reachabilityFence(this);
}
}
public int getInt(int i) {
try {
return getInt(ix(checkIndex(i, (1 << 2))));
} finally {
Reference.reachabilityFence(this);
}
}
private ByteBuffer putInt(long a, int x) {
try {
int y = (x);
SCOPED_MEMORY_ACCESS.putIntUnaligned(scope(), null, a, y, bigEndian);
} finally {
Reference.reachabilityFence(this);
}
return this;
}
public ByteBuffer putInt(int x) {
putInt(ix(nextPutIndex((1 << 2))), x);
return this;
}
public ByteBuffer putInt(int i, int x) {
putInt(ix(checkIndex(i, (1 << 2))), x);
return this;
}
public IntBuffer asIntBuffer() {
int off = this.position();
int lim = this.limit();
assert (off <= lim);
int rem = (off <= lim ? lim - off : 0);
int size = rem >> 2;
if (!UNALIGNED && ((address + off) % (1 << 2) != 0)) {
return (bigEndian
? (IntBuffer)(new ByteBufferAsIntBufferB(this,
-1,
0,
size,
size,
address + off, segment))
: (IntBuffer)(new ByteBufferAsIntBufferL(this,
-1,
0,
size,
size,
address + off, segment)));
} else {
return (nativeByteOrder
? (IntBuffer)(new DirectIntBufferU(this,
-1,
0,
size,
size,
off, segment))
: (IntBuffer)(new DirectIntBufferS(this,
-1,
0,
size,
size,
off, segment)));
}
}
private long getLong(long a) {
try {
long x = SCOPED_MEMORY_ACCESS.getLongUnaligned(scope(), null, a, bigEndian);
return (x);
} finally {
Reference.reachabilityFence(this);
}
}
public long getLong() {
try {
return getLong(ix(nextGetIndex((1 << 3))));
} finally {
Reference.reachabilityFence(this);
}
}
public long getLong(int i) {
try {
return getLong(ix(checkIndex(i, (1 << 3))));
} finally {
Reference.reachabilityFence(this);
}
}
private ByteBuffer putLong(long a, long x) {
try {
long y = (x);
SCOPED_MEMORY_ACCESS.putLongUnaligned(scope(), null, a, y, bigEndian);
} finally {
Reference.reachabilityFence(this);
}
return this;
}
public ByteBuffer putLong(long x) {
putLong(ix(nextPutIndex((1 << 3))), x);
return this;
}
public ByteBuffer putLong(int i, long x) {
putLong(ix(checkIndex(i, (1 << 3))), x);
return this;
}
public LongBuffer asLongBuffer() {
int off = this.position();
int lim = this.limit();
assert (off <= lim);
int rem = (off <= lim ? lim - off : 0);
int size = rem >> 3;
if (!UNALIGNED && ((address + off) % (1 << 3) != 0)) {
return (bigEndian
? (LongBuffer)(new ByteBufferAsLongBufferB(this,
-1,
0,
size,
size,
address + off, segment))
: (LongBuffer)(new ByteBufferAsLongBufferL(this,
-1,
0,
size,
size,
address + off, segment)));
} else {
return (nativeByteOrder
? (LongBuffer)(new DirectLongBufferU(this,
-1,
0,
size,
size,
off, segment))
: (LongBuffer)(new DirectLongBufferS(this,
-1,
0,
size,
size,
off, segment)));
}
}
private float getFloat(long a) {
try {
int x = SCOPED_MEMORY_ACCESS.getIntUnaligned(scope(), null, a, bigEndian);
return Float.intBitsToFloat(x);
} finally {
Reference.reachabilityFence(this);
}
}
public float getFloat() {
try {
return getFloat(ix(nextGetIndex((1 << 2))));
} finally {
Reference.reachabilityFence(this);
}
}
public float getFloat(int i) {
try {
return getFloat(ix(checkIndex(i, (1 << 2))));
} finally {
Reference.reachabilityFence(this);
}
}
private ByteBuffer putFloat(long a, float x) {
try {
int y = Float.floatToRawIntBits(x);
SCOPED_MEMORY_ACCESS.putIntUnaligned(scope(), null, a, y, bigEndian);
} finally {
Reference.reachabilityFence(this);
}
return this;
}
public ByteBuffer putFloat(float x) {
putFloat(ix(nextPutIndex((1 << 2))), x);
return this;
}
public ByteBuffer putFloat(int i, float x) {
putFloat(ix(checkIndex(i, (1 << 2))), x);
return this;
}
public FloatBuffer asFloatBuffer() {
int off = this.position();
int lim = this.limit();
assert (off <= lim);
int rem = (off <= lim ? lim - off : 0);
int size = rem >> 2;
if (!UNALIGNED && ((address + off) % (1 << 2) != 0)) {
return (bigEndian
? (FloatBuffer)(new ByteBufferAsFloatBufferB(this,
-1,
0,
size,
size,
address + off, segment))
: (FloatBuffer)(new ByteBufferAsFloatBufferL(this,
-1,
0,
size,
size,
address + off, segment)));
} else {
return (nativeByteOrder
? (FloatBuffer)(new DirectFloatBufferU(this,
-1,
0,
size,
size,
off, segment))
: (FloatBuffer)(new DirectFloatBufferS(this,
-1,
0,
size,
size,
off, segment)));
}
}
private double getDouble(long a) {
try {
long x = SCOPED_MEMORY_ACCESS.getLongUnaligned(scope(), null, a, bigEndian);
return Double.longBitsToDouble(x);
} finally {
Reference.reachabilityFence(this);
}
}
public double getDouble() {
try {
return getDouble(ix(nextGetIndex((1 << 3))));
} finally {
Reference.reachabilityFence(this);
}
}
public double getDouble(int i) {
try {
return getDouble(ix(checkIndex(i, (1 << 3))));
} finally {
Reference.reachabilityFence(this);
}
}
private ByteBuffer putDouble(long a, double x) {
try {
long y = Double.doubleToRawLongBits(x);
SCOPED_MEMORY_ACCESS.putLongUnaligned(scope(), null, a, y, bigEndian);
} finally {
Reference.reachabilityFence(this);
}
return this;
}
public ByteBuffer putDouble(double x) {
putDouble(ix(nextPutIndex((1 << 3))), x);
return this;
}
public ByteBuffer putDouble(int i, double x) {
putDouble(ix(checkIndex(i, (1 << 3))), x);
return this;
}
public DoubleBuffer asDoubleBuffer() {
int off = this.position();
int lim = this.limit();
assert (off <= lim);
int rem = (off <= lim ? lim - off : 0);
int size = rem >> 3;
if (!UNALIGNED && ((address + off) % (1 << 3) != 0)) {
return (bigEndian
? (DoubleBuffer)(new ByteBufferAsDoubleBufferB(this,
-1,
0,
size,
size,
address + off, segment))
: (DoubleBuffer)(new ByteBufferAsDoubleBufferL(this,
-1,
0,
size,
size,
address + off, segment)));
} else {
return (nativeByteOrder
? (DoubleBuffer)(new DirectDoubleBufferU(this,
-1,
0,
size,
size,
off, segment))
: (DoubleBuffer)(new DirectDoubleBufferS(this,
-1,
0,
size,
size,
off, segment)));
}
}
}
⏎ java/nio/DirectByteBuffer.java
Or download all of them as a single archive file:
File name: java.base-17.0.5-src.zip File size: 8883851 bytes Release date: 2022-09-13 Download
2023-09-26, 45921👍, 1💬
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