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/**
* Copyright 2010 JogAmp Community. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation are those of the
* authors and should not be interpreted as representing official policies, either expressed
* or implied, of JogAmp Community.
*/
/*
* Created on Saturday, March 27 2010 11:55
*/
package com.jogamp.common.nio;
import java.nio.Buffer;
import java.nio.ByteBuffer;
import java.nio.IntBuffer;
import java.nio.LongBuffer;
import com.jogamp.common.os.Platform;
import com.jogamp.common.util.LongObjectHashMap;
/**
* Hardware independent container for native pointer arrays.
*
* The native values (NIO direct ByteBuffer) might be 32bit or 64bit wide,
* depending of the CPU pointer width.
*
* @author Sven Gothel
* @author Michael Bien
*/
public class PointerBuffer extends AbstractBuffer {
public static final int ELEMENT_SIZE = Platform.is32Bit() ? Buffers.SIZEOF_INT : Buffers.SIZEOF_LONG ;
protected LongObjectHashMap dataMap = null;
static {
Platform.initSingleton(); // loads native gluegen-rt library
}
/** no backup array, use for direct usage only */
static PointerBuffer create(final ByteBuffer bb) {
return Platform.is32Bit() ? new PointerBuffer( bb.asIntBuffer() ) : new PointerBuffer( bb.asLongBuffer() );
}
/** supports backup array */
PointerBuffer(final IntBuffer b) {
super(b, ELEMENT_SIZE, b.capacity());
}
/** supports backup array */
PointerBuffer(final LongBuffer b) {
super(b, ELEMENT_SIZE, b.capacity());
}
private final void validateDataMap() {
if(null == dataMap) {
dataMap = new LongObjectHashMap();
dataMap.setKeyNotFoundValue(null);
}
}
/** Returns a non direct PointerBuffer in native order, having a backup array */
public static PointerBuffer allocate(final int size) {
if (Platform.is32Bit()) {
return new PointerBuffer(IntBuffer.wrap(new int[size]));
} else {
return new PointerBuffer(LongBuffer.wrap(new long[size]));
}
}
/** Returns a direct PointerBuffer in native order, w/o backup array */
public static PointerBuffer allocateDirect(final int size) {
return create(Buffers.newDirectByteBuffer(ELEMENT_SIZE * size));
}
public static PointerBuffer wrap(final ByteBuffer src) {
return create(src);
}
/**
* @return new PointerBuffer sharing the same buffer data of this instance (identity),
* but having an independent position.
*/
public final PointerBuffer duplicate() {
PointerBuffer npb;
if (Platform.is32Bit()) {
npb = new PointerBuffer((IntBuffer)buffer);
} else {
npb = new PointerBuffer((LongBuffer)buffer);
}
if(null != dataMap) {
npb.dataMap = (LongObjectHashMap) dataMap.clone();
}
npb.position = position;
return npb;
}
/**
* Relative bulk get method. Copy the source values src[position .. capacity] [
* to this buffer and increment the position by capacity-position. */
@Override
public final PointerBuffer put(final PointerBuffer src) {
if (remaining() < src.remaining()) {
throw new IndexOutOfBoundsException();
}
if( null == src.dataMap && null == dataMap ) {
// fast path no dataMap usage on both
while (src.hasRemaining()) {
put(src.get());
}
} else {
while (src.hasRemaining()) {
final long addr = src.get();
put(addr);
if( null != src.dataMap) {
final Buffer bb = (Buffer) src.dataMap.get(addr);
if(null!=bb) {
validateDataMap();
dataMap.put(addr, bb);
} else if( null != dataMap ) {
dataMap.remove(addr);
}
} else if( null != dataMap ) {
dataMap.remove(addr);
}
}
}
return this;
}
/** Relative get method. Get the pointer value at the current position and increment the position by one. */
@Override
public final long get() {
final long r = get(position);
position++;
return r;
}
/** Absolute get method. Get the pointer value at the given index */
@Override
public final long get(final int idx) {
if (0 > idx || idx >= capacity) {
throw new IndexOutOfBoundsException();
}
if (Platform.is32Bit()) {
return ((IntBuffer) buffer).get(idx) & 0x00000000FFFFFFFFL;
} else {
return ((LongBuffer) buffer).get(idx);
}
}
/**
* Relative bulk get method. Copy the pointer values [ position .. position+length [
* to the destination array [ dest[offset] .. dest[offset+length] [
* and increment the position by length. */
public final PointerBuffer get(final long[] dest, int offset, int length) {
if (dest.length0) {
dest[offset++] = get(position++);
length--;
}
return this;
}
/** Absolute put method. Put the pointer value at the given index */
@Override
public final PointerBuffer put(final int idx, final long v) {
if (0 > idx || idx >= capacity) {
throw new IndexOutOfBoundsException();
}
if (Platform.is32Bit()) {
((IntBuffer) buffer).put(idx, (int) v);
} else {
((LongBuffer) buffer).put(idx, v);
}
return this;
}
/** Relative put method. Put the pointer value at the current position and increment the position by one. */
@Override
public final PointerBuffer put(final long value) {
put(position, value);
position++;
return this;
}
/**
* Relative bulk put method. Put the pointer values [ src[offset] .. src[offset+length] [
* at the current position and increment the position by length. */
public final PointerBuffer put(final long[] src, int offset, int length) {
if (src.length0) {
put(position++, src[offset++]);
length--;
}
return this;
}
/** Put the address of the given direct Buffer at the given position
of this pointer array.
Adding a reference of the given direct Buffer to this object.
@throws IllegalArgumentException if bb is null or not a direct buffer
*/
public final PointerBuffer referenceBuffer(final int index, final Buffer bb) {
if(null==bb) {
throw new IllegalArgumentException("Buffer is null");
}
if(!Buffers.isDirect(bb)) {
throw new IllegalArgumentException("Buffer is not direct");
}
final long mask = Platform.is32Bit() ? 0x00000000FFFFFFFFL : 0xFFFFFFFFFFFFFFFFL ;
final long bbAddr = getDirectBufferAddressImpl(bb) & mask;
if(0==bbAddr) {
throw new RuntimeException("Couldn't determine native address of given Buffer: "+bb);
}
validateDataMap();
put(index, bbAddr);
dataMap.put(bbAddr, bb);
return this;
}
/** Put the address of the given direct Buffer at the end
of this pointer array.
Adding a reference of the given direct Buffer to this object. */
public final PointerBuffer referenceBuffer(final Buffer bb) {
referenceBuffer(position, bb);
position++;
return this;
}
public final Buffer getReferencedBuffer(final int index) {
if(null != dataMap) {
final long addr = get(index);
return (Buffer) dataMap.get(addr);
}
return null;
}
public final Buffer getReferencedBuffer() {
final Buffer bb = getReferencedBuffer(position);
position++;
return bb;
}
private native long getDirectBufferAddressImpl(Object directBuffer);
@Override
public String toString() {
return "PointerBuffer:"+super.toString();
}
}
