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/*
* Copyright (c) 2010, Michael Bien
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Michael Bien nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 Michael Bien 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.
*/
/*
* 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 {
protected HashMap/*<aptr, buffer>*/ dataMap = new HashMap();
static {
NativeLibrary.ensureNativeLibLoaded();
}
protected PointerBuffer(ByteBuffer bb) {
super(bb, elementSize());
}
public static PointerBuffer allocate(int size) {
if (Platform.isJavaSE()) {
return new PointerBufferSE(ByteBuffer.wrap(new byte[elementSize() * size]));
} else {
return new PointerBufferME_CDC_FP(ByteBuffer.wrap(new byte[elementSize() * size]));
}
}
public static PointerBuffer allocateDirect(int size) {
if (Platform.isJavaSE()) {
return new PointerBufferSE(Buffers.newDirectByteBuffer(elementSize() * size));
} else {
return new PointerBufferME_CDC_FP(Buffers.newDirectByteBuffer(elementSize() * size));
}
}
public static PointerBuffer wrap(ByteBuffer src) {
PointerBuffer res;
if (Platform.isJavaSE()) {
res = new PointerBufferSE(src);
} else {
res = new PointerBufferME_CDC_FP(src);
}
res.updateBackup();
return res;
}
public static int elementSize() {
return Platform.is32Bit() ? Buffers.SIZEOF_INT : Buffers.SIZEOF_LONG;
}
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(!bb.isDirect()) {
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 (Buffer) dataMap.get(new Long(addr));
}
public final Buffer getReferencedBuffer() {
Buffer bb = getReferencedBuffer(position);
position++;
return bb;
}
private native long getDirectBufferAddressImpl(Object directBuffer);
public String toString() {
return "PointerBuffer:"+super.toString();
}
}
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