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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 com.jogamp.common.os.*;
import java.nio.ByteBuffer;
import java.nio.Buffer;
import java.util.HashMap;
/**
* 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 Michael Bien
* @author Sven Gothel
*/
public abstract class PointerBuffer extends AbstractLongBuffer<PointerBuffer> {
protected HashMap<Long, Buffer> dataMap = new HashMap<Long, Buffer>();
static {
NativeLibrary.ensureNativeLibLoaded();
}
protected PointerBuffer(ByteBuffer bb) {
super(bb, elementSize());
}
public static PointerBuffer allocate(int size) {
return new PointerBufferSE(ByteBuffer.wrap(new byte[elementSize() * size]));
}
public static PointerBuffer allocateDirect(int size) {
return new PointerBufferSE(Buffers.newDirectByteBuffer(elementSize() * size));
}
public static PointerBuffer wrap(ByteBuffer src) {
PointerBuffer res = new PointerBufferSE(src);
res.updateBackup();
return res;
}
public static int elementSize() {
return Platform.is32Bit() ? Buffers.SIZEOF_INT : Buffers.SIZEOF_LONG;
}
@Override
public final PointerBuffer put(PointerBuffer src) {
if (remaining() < src.remaining()) {
throw new IndexOutOfBoundsException();
}
long addr;
while (src.hasRemaining()) {
addr = src.get();
put(addr);
Long addrL = new Long(addr);
Buffer bb = (Buffer) dataMap.get(addrL);
if(null!=bb) {
dataMap.put(addrL, bb);
} else {
dataMap.remove(addrL);
}
}
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. */
public final PointerBuffer referenceBuffer(int index, Buffer bb) {
if(null==bb) {
throw new RuntimeException("Buffer is null");
}
if(!Buffers.isDirect(bb)) {
throw new RuntimeException("Buffer is not direct");
}
long mask = Platform.is32Bit() ? 0x00000000FFFFFFFFL : 0xFFFFFFFFFFFFFFFFL ;
long bbAddr = getDirectBufferAddressImpl(bb) & mask;
if(0==bbAddr) {
throw new RuntimeException("Couldn't determine native address of given Buffer: "+bb);
}
put(index, bbAddr);
dataMap.put(new Long(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(Buffer bb) {
referenceBuffer(position, bb);
position++;
return this;
}
public final Buffer getReferencedBuffer(int index) {
long addr = get(index);
return dataMap.get(new Long(addr));
}
public final Buffer getReferencedBuffer() {
Buffer bb = getReferencedBuffer(position);
position++;
return bb;
}
private native long getDirectBufferAddressImpl(Object directBuffer);
@Override
public String toString() {
return "PointerBuffer:"+super.toString();
}
}
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