DirectByteBufferpublic class DirectByteBuffer extends MappedByteBuffer implements DirectBuffer
| Fields Summary |
|---|
| protected static final Unsafe | unsafe | | protected static final boolean | unaligned | | protected Object | viewedBuffer | | private final sun.misc.Cleaner | cleaner |
| Constructors Summary |
|---|
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));
| private DirectByteBuffer(long addr, int cap)
super(-1, 0, cap, cap, false);
address = addr;
cleaner = null;
| protected DirectByteBuffer(int cap, long addr, Runnable unmapper)
super(-1, 0, cap, cap, true);
address = addr;
viewedBuffer = null;
cleaner = Cleaner.create(this, unmapper);
| DirectByteBuffer(DirectBuffer db, int mark, int pos, int lim, int cap, int off)
super(mark, pos, lim, cap);
address = db.address() + off;
viewedBuffer = db;
cleaner = null;
|
| Methods Summary |
|---|
| byte | _get(int i) // package-private
return unsafe.getByte(address + i);
| | void | _put(int i, byte b) // package-private
unsafe.putByte(address + i, b);
| | public long | address()
return address;
| | public java.nio.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)));
}
| | public java.nio.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)));
}
| | public java.nio.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)));
}
| | public java.nio.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)));
}
| | public java.nio.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)));
}
| | public java.nio.ByteBuffer | asReadOnlyBuffer()
return new DirectByteBufferR(this,
this.markValue(),
this.position(),
this.limit(),
this.capacity(),
0);
| | public java.nio.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)));
}
| | public sun.misc.Cleaner | cleaner() return cleaner;
| | public java.nio.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 java.nio.ByteBuffer | duplicate()
return new DirectByteBuffer(this,
this.markValue(),
this.position(),
this.limit(),
this.capacity(),
0);
| | public byte | get()
return ((unsafe.getByte(ix(nextGetIndex()))));
| | public byte | get(int i)
return ((unsafe.getByte(ix(checkIndex(i)))));
| | public java.nio.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;
| | 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 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 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 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 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 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))));
| | public boolean | isDirect()
return true;
| | public boolean | isReadOnly()
return false;
| | private long | ix(int i)
return address + (i << 0);
| | public java.nio.ByteBuffer | put(byte x)
unsafe.putByte(ix(nextPutIndex()), ((x)));
return this;
| | public java.nio.ByteBuffer | put(int i, byte x)
unsafe.putByte(ix(checkIndex(i)), ((x)));
return this;
| | public java.nio.ByteBuffer | put(java.nio.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 java.nio.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;
| | private java.nio.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 java.nio.ByteBuffer | putChar(char x)
putChar(ix(nextPutIndex((1 << 1))), x);
return this;
| | public java.nio.ByteBuffer | putChar(int i, char x)
putChar(ix(checkIndex(i, (1 << 1))), x);
return this;
| | private java.nio.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 java.nio.ByteBuffer | putDouble(double x)
putDouble(ix(nextPutIndex((1 << 3))), x);
return this;
| | public java.nio.ByteBuffer | putDouble(int i, double x)
putDouble(ix(checkIndex(i, (1 << 3))), x);
return this;
| | private java.nio.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 java.nio.ByteBuffer | putFloat(float x)
putFloat(ix(nextPutIndex((1 << 2))), x);
return this;
| | public java.nio.ByteBuffer | putFloat(int i, float x)
putFloat(ix(checkIndex(i, (1 << 2))), x);
return this;
| | private java.nio.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 java.nio.ByteBuffer | putInt(int x)
putInt(ix(nextPutIndex((1 << 2))), x);
return this;
| | public java.nio.ByteBuffer | putInt(int i, int x)
putInt(ix(checkIndex(i, (1 << 2))), x);
return this;
| | private java.nio.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 java.nio.ByteBuffer | putLong(long x)
putLong(ix(nextPutIndex((1 << 3))), x);
return this;
| | public java.nio.ByteBuffer | putLong(int i, long x)
putLong(ix(checkIndex(i, (1 << 3))), x);
return this;
| | private java.nio.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 java.nio.ByteBuffer | putShort(short x)
putShort(ix(nextPutIndex((1 << 1))), x);
return this;
| | public java.nio.ByteBuffer | putShort(int i, short x)
putShort(ix(checkIndex(i, (1 << 1))), x);
return this;
| | public java.nio.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 java.lang.Object | viewedBuffer()
return viewedBuffer;
|
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