/*
* @(#)Direct-X-Buffer.java 1.48 04/05/03
*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
// -- This file was mechanically generated: Do not edit! -- //
package java.nio;
import sun.misc.Cleaner;
import sun.misc.Unsafe;
import sun.nio.ch.DirectBuffer;
import sun.nio.ch.FileChannelImpl;
class DirectByteBuffer
extends MappedByteBuffer
implements DirectBuffer
{
// Cached unsafe-access object
protected static final Unsafe unsafe = Bits.unsafe();
// 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;
// If this buffer is a view of another buffer then we keep a reference to
// that buffer so that its memory isn't freed before we're done with it
protected Object viewedBuffer = null;
public Object viewedBuffer() {
return viewedBuffer;
}
private static class Deallocator
implements Runnable
{
private static Unsafe unsafe = Unsafe.getUnsafe();
private long address;
private int capacity;
private Deallocator(long address, int capacity) {
assert (address != 0);
this.address = address;
this.capacity = capacity;
}
public void run() {
if (address == 0) {
// Paranoia
return;
}
unsafe.freeMemory(address);
address = 0;
Bits.unreserveMemory(capacity);
}
}
private final Cleaner cleaner;
public Cleaner cleaner() { return cleaner; }
// Primary constructor
//
DirectByteBuffer(int cap) { // package-private
super(-1, 0, cap, cap, false);
Bits.reserveMemory(cap);
int ps = Bits.pageSize();
long base = 0;
try {
base = unsafe.allocateMemory(cap + ps);
} catch (OutOfMemoryError x) {
Bits.unreserveMemory(cap);
throw x;
}
unsafe.setMemory(base, cap + ps, (byte) 0);
if (base % ps != 0) {
// Round up to page boundary
address = base + ps - (base & (ps - 1));
} else {
address = base;
}
cleaner = Cleaner.create(this, new Deallocator(base, cap));
}
// Invoked only by JNI: NewDirectByteBuffer(void*, long)
//
private DirectByteBuffer(long addr, int cap) {
super(-1, 0, cap, cap, false);
address = addr;
cleaner = null;
}
// For memory-mapped buffers -- invoked by FileChannelImpl via reflection
//
protected DirectByteBuffer(int cap, long addr, Runnable unmapper) {
super(-1, 0, cap, cap, true);
address = addr;
viewedBuffer = null;
cleaner = Cleaner.create(this, unmapper);
}
// For duplicates and slices
//
DirectByteBuffer(DirectBuffer db, // package-private
int mark, int pos, int lim, int cap,
int off)
{
super(mark, pos, lim, cap);
address = db.address() + off;
viewedBuffer = db;
cleaner = null;
}
public ByteBuffer slice() {
int pos = this.position();
int lim = this.limit();
assert (pos <= lim);
int rem = (pos <= lim ? lim - pos : 0);
int off = (pos << 0);
assert (off >= 0);
return new DirectByteBuffer(this, -1, 0, rem, rem, off);
}
public ByteBuffer duplicate() {
return new DirectByteBuffer(this,
this.markValue(),
this.position(),
this.limit(),
this.capacity(),
0);
}
public ByteBuffer asReadOnlyBuffer() {
return new DirectByteBufferR(this,
this.markValue(),
this.position(),
this.limit(),
this.capacity(),
0);
}
public long address() {
return address;
}
private long ix(int i) {
return address + (i << 0);
}
public byte get() {
return ((unsafe.getByte(ix(nextGetIndex()))));
}
public byte get(int i) {
return ((unsafe.getByte(ix(checkIndex(i)))));
}
public ByteBuffer get(byte[] dst, int offset, int length) {
if ((length << 0) > Bits.JNI_COPY_TO_ARRAY_THRESHOLD) {
checkBounds(offset, length, dst.length);
int pos = position();
int lim = limit();
assert (pos <= lim);
int rem = (pos <= lim ? lim - pos : 0);
if (length > rem)
throw new BufferUnderflowException();
if (order() != ByteOrder.nativeOrder())
Bits.copyToByteArray(ix(pos), dst,
offset << 0,
length << 0);
else
Bits.copyToByteArray(ix(pos), dst,
offset << 0,
length << 0);
position(pos + length);
} else {
super.get(dst, offset, length);
}
return this;
}
public ByteBuffer put(byte x) {
unsafe.putByte(ix(nextPutIndex()), ((x)));
return this;
}
public ByteBuffer put(int i, byte x) {
unsafe.putByte(ix(checkIndex(i)), ((x)));
return this;
}
public ByteBuffer put(ByteBuffer src) {
if (src instanceof DirectByteBuffer) {
if (src == this)
throw new IllegalArgumentException();
DirectByteBuffer sb = (DirectByteBuffer)src;
int spos = sb.position();
int slim = sb.limit();
assert (spos <= slim);
int srem = (spos <= slim ? slim - spos : 0);
int pos = position();
int lim = limit();
assert (pos <= lim);
int rem = (pos <= lim ? lim - pos : 0);
if (srem > rem)
throw new BufferOverflowException();
unsafe.copyMemory(sb.ix(spos), ix(pos), srem << 0);
sb.position(spos + srem);
position(pos + srem);
} else if (!src.isDirect()) {
int spos = src.position();
int slim = src.limit();
assert (spos <= slim);
int srem = (spos <= slim ? slim - spos : 0);
put(src.hb, src.offset + spos, srem);
src.position(spos + srem);
} else {
super.put(src);
}
return this;
}
public ByteBuffer put(byte[] src, int offset, int length) {
if ((length << 0) > Bits.JNI_COPY_FROM_ARRAY_THRESHOLD) {
checkBounds(offset, length, src.length);
int pos = position();
int lim = limit();
assert (pos <= lim);
int rem = (pos <= lim ? lim - pos : 0);
if (length > rem)
throw new BufferOverflowException();
if (order() != ByteOrder.nativeOrder())
Bits.copyFromByteArray(src, offset << 0,
ix(pos), length << 0);
else
Bits.copyFromByteArray(src, offset << 0,
ix(pos), length << 0);
position(pos + length);
} else {
super.put(src, offset, length);
}
return this;
}
public ByteBuffer compact() {
int pos = position();
int lim = limit();
assert (pos <= lim);
int rem = (pos <= lim ? lim - pos : 0);
unsafe.copyMemory(ix(pos), ix(0), rem << 0);
position(rem);
limit(capacity());
return this;
}
public boolean isDirect() {
return true;
}
public boolean isReadOnly() {
return false;
}
byte _get(int i) { // package-private
return unsafe.getByte(address + i);
}
void _put(int i, byte b) { // package-private
unsafe.putByte(address + i, b);
}
private char getChar(long a) {
if (unaligned) {
char x = unsafe.getChar(a);
return (nativeByteOrder ? x : Bits.swap(x));
}
return Bits.getChar(a, bigEndian);
}
public char getChar() {
return getChar(ix(nextGetIndex((1 << 1))));
}
public char getChar(int i) {
return getChar(ix(checkIndex(i, (1 << 1))));
}
private ByteBuffer putChar(long a, char x) {
if (unaligned) {
char y = (x);
unsafe.putChar(a, (nativeByteOrder ? y : Bits.swap(y)));
} else {
Bits.putChar(a, x, bigEndian);
}
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,
off))
: (CharBuffer)(new ByteBufferAsCharBufferL(this,
-1,
0,
size,
size,
off)));
} else {
return (nativeByteOrder
? (CharBuffer)(new DirectCharBufferU(this,
-1,
0,
size,
size,
off))
: (CharBuffer)(new DirectCharBufferS(this,
-1,
0,
size,
size,
off)));
}
}
private short getShort(long a) {
if (unaligned) {
short x = unsafe.getShort(a);
return (nativeByteOrder ? x : Bits.swap(x));
}
return Bits.getShort(a, bigEndian);
}
public short getShort() {
return getShort(ix(nextGetIndex((1 << 1))));
}
public short getShort(int i) {
return getShort(ix(checkIndex(i, (1 << 1))));
}
private ByteBuffer putShort(long a, short x) {
if (unaligned) {
short y = (x);
unsafe.putShort(a, (nativeByteOrder ? y : Bits.swap(y)));
} else {
Bits.putShort(a, x, bigEndian);
}
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,
off))
: (ShortBuffer)(new ByteBufferAsShortBufferL(this,
-1,
0,
size,
size,
off)));
} else {
return (nativeByteOrder
? (ShortBuffer)(new DirectShortBufferU(this,
-1,
0,
size,
size,
off))
: (ShortBuffer)(new DirectShortBufferS(this,
-1,
0,
size,
size,
off)));
}
}
private int getInt(long a) {
if (unaligned) {
int x = unsafe.getInt(a);
return (nativeByteOrder ? x : Bits.swap(x));
}
return Bits.getInt(a, bigEndian);
}
public int getInt() {
return getInt(ix(nextGetIndex((1 << 2))));
}
public int getInt(int i) {
return getInt(ix(checkIndex(i, (1 << 2))));
}
private ByteBuffer putInt(long a, int x) {
if (unaligned) {
int y = (x);
unsafe.putInt(a, (nativeByteOrder ? y : Bits.swap(y)));
} else {
Bits.putInt(a, x, bigEndian);
}
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,
off))
: (IntBuffer)(new ByteBufferAsIntBufferL(this,
-1,
0,
size,
size,
off)));
} else {
return (nativeByteOrder
? (IntBuffer)(new DirectIntBufferU(this,
-1,
0,
size,
size,
off))
: (IntBuffer)(new DirectIntBufferS(this,
-1,
0,
size,
size,
off)));
}
}
private long getLong(long a) {
if (unaligned) {
long x = unsafe.getLong(a);
return (nativeByteOrder ? x : Bits.swap(x));
}
return Bits.getLong(a, bigEndian);
}
public long getLong() {
return getLong(ix(nextGetIndex((1 << 3))));
}
public long getLong(int i) {
return getLong(ix(checkIndex(i, (1 << 3))));
}
private ByteBuffer putLong(long a, long x) {
if (unaligned) {
long y = (x);
unsafe.putLong(a, (nativeByteOrder ? y : Bits.swap(y)));
} else {
Bits.putLong(a, x, bigEndian);
}
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,
off))
: (LongBuffer)(new ByteBufferAsLongBufferL(this,
-1,
0,
size,
size,
off)));
} else {
return (nativeByteOrder
? (LongBuffer)(new DirectLongBufferU(this,
-1,
0,
size,
size,
off))
: (LongBuffer)(new DirectLongBufferS(this,
-1,
0,
size,
size,
off)));
}
}
private float getFloat(long a) {
if (unaligned) {
int x = unsafe.getInt(a);
return Float.intBitsToFloat(nativeByteOrder ? x : Bits.swap(x));
}
return Bits.getFloat(a, bigEndian);
}
public float getFloat() {
return getFloat(ix(nextGetIndex((1 << 2))));
}
public float getFloat(int i) {
return getFloat(ix(checkIndex(i, (1 << 2))));
}
private ByteBuffer putFloat(long a, float x) {
if (unaligned) {
int y = Float.floatToRawIntBits(x);
unsafe.putInt(a, (nativeByteOrder ? y : Bits.swap(y)));
} else {
Bits.putFloat(a, x, bigEndian);
}
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,
off))
: (FloatBuffer)(new ByteBufferAsFloatBufferL(this,
-1,
0,
size,
size,
off)));
} else {
return (nativeByteOrder
? (FloatBuffer)(new DirectFloatBufferU(this,
-1,
0,
size,
size,
off))
: (FloatBuffer)(new DirectFloatBufferS(this,
-1,
0,
size,
size,
off)));
}
}
private double getDouble(long a) {
if (unaligned) {
long x = unsafe.getLong(a);
return Double.longBitsToDouble(nativeByteOrder ? x : Bits.swap(x));
}
return Bits.getDouble(a, bigEndian);
}
public double getDouble() {
return getDouble(ix(nextGetIndex((1 << 3))));
}
public double getDouble(int i) {
return getDouble(ix(checkIndex(i, (1 << 3))));
}
private ByteBuffer putDouble(long a, double x) {
if (unaligned) {
long y = Double.doubleToRawLongBits(x);
unsafe.putLong(a, (nativeByteOrder ? y : Bits.swap(y)));
} else {
Bits.putDouble(a, x, bigEndian);
}
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,
off))
: (DoubleBuffer)(new ByteBufferAsDoubleBufferL(this,
-1,
0,
size,
size,
off)));
} else {
return (nativeByteOrder
? (DoubleBuffer)(new DirectDoubleBufferU(this,
-1,
0,
size,
size,
off))
: (DoubleBuffer)(new DirectDoubleBufferS(this,
-1,
0,
size,
size,
off)));
}
}
}
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