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DirectLongBufferU.javaAPI DocJava SE 5 API6000Fri Aug 26 16:49:04 BST 2005java.nio

DirectLongBufferU

public class DirectLongBufferU extends LongBuffer implements DirectBuffer

Fields Summary
protected static final Unsafe
unsafe
protected static final boolean
unaligned
protected Object
viewedBuffer
Constructors Summary
DirectLongBufferU(DirectBuffer db, int mark, int pos, int lim, int cap, int off)


	super(mark, pos, lim, cap);
	address = db.address() + off;
	viewedBuffer = db;






    
Methods Summary
public longaddress()

	return address;
    
public java.nio.LongBufferasReadOnlyBuffer()


	return new DirectLongBufferRU(this,
					   this.markValue(),
					   this.position(),
					   this.limit(),
					   this.capacity(),
					   0);



    
public sun.misc.Cleanercleaner()

 return null; 
public java.nio.LongBuffercompact()


	int pos = position();
	int lim = limit();
	assert (pos <= lim);
	int rem = (pos <= lim ? lim - pos : 0);

 	unsafe.copyMemory(ix(pos), ix(0), rem << 3);
 	position(rem);
	limit(capacity());
	return this;



    
public java.nio.LongBufferduplicate()

	return new DirectLongBufferU(this,
					      this.markValue(),
					      this.position(),
					      this.limit(),
					      this.capacity(),
					      0);
    
public longget(int i)

	return ((unsafe.getLong(ix(checkIndex(i)))));
    
public java.nio.LongBufferget(long[] dst, int offset, int length)


	if ((length << 3) > 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.copyToLongArray(ix(pos), dst,
					  offset << 3,
					  length << 3);
	    else
		Bits.copyToByteArray(ix(pos), dst,
				     offset << 3,
				     length << 3);
	    position(pos + length);
	} else {
	    super.get(dst, offset, length);
	}
	return this;



    
public longget()

	return ((unsafe.getLong(ix(nextGetIndex()))));
    
public booleanisDirect()

	return true;
    
public booleanisReadOnly()

	return false;
    
private longix(int i)

        return address + (i << 3);
    
public java.nio.ByteOrderorder()






	return ((ByteOrder.nativeOrder() != ByteOrder.BIG_ENDIAN)
		? ByteOrder.LITTLE_ENDIAN : ByteOrder.BIG_ENDIAN);

    
public java.nio.LongBufferput(long x)


	unsafe.putLong(ix(nextPutIndex()), ((x)));
	return this;



    
public java.nio.LongBufferput(int i, long x)


	unsafe.putLong(ix(checkIndex(i)), ((x)));
	return this;



    
public java.nio.LongBufferput(java.nio.LongBuffer src)


	if (src instanceof DirectLongBufferU) {
	    if (src == this)
		throw new IllegalArgumentException();
	    DirectLongBufferU sb = (DirectLongBufferU)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 << 3);
 	    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.LongBufferput(long[] src, int offset, int length)


	if ((length << 3) > 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.copyFromLongArray(src, offset << 3,
					    ix(pos), length << 3);
	    else
		Bits.copyFromByteArray(src, offset << 3,
				       ix(pos), length << 3);
	    position(pos + length);
	} else {
	    super.put(src, offset, length);
	}
	return this;



    
public java.nio.LongBufferslice()

	int pos = this.position();
	int lim = this.limit();
	assert (pos <= lim);
	int rem = (pos <= lim ? lim - pos : 0);
	int off = (pos << 3);
        assert (off >= 0);
	return new DirectLongBufferU(this, -1, 0, rem, rem, off);
    
public java.lang.ObjectviewedBuffer()


       
        return viewedBuffer;