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/*
* Copyright (c) 2009 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.
*/
package com.jogamp.opencl.impl;
import java.nio.Buffer;
import java.nio.ByteBuffer;
import com.jogamp.common.nio.Buffers;
import com.jogamp.common.nio.PointerBuffer;
import com.jogamp.common.os.Platform;
import com.jogamp.common.util.Bitstream;
import com.jogamp.opencl.CLException;
import com.jogamp.opencl.spi.CLInfoAccessor;
import com.jogamp.opencl.util.CLUtil;
/**
* Internal utility for common OpenCL clGetFooInfo calls.
* Threadsafe, threadlocal implementation.
* @author Michael Bien, et al.
*/
public abstract class CLTLInfoAccessor implements CLInfoAccessor {
private static final int BB_SIZE = 512;
protected final static ThreadLocal<ByteBuffer> localBB = new ThreadLocal<ByteBuffer>() {
@Override
protected ByteBuffer initialValue() {
return Buffers.newDirectByteBuffer(BB_SIZE);
}
};
protected final static ThreadLocal<PointerBuffer> localNSB = new ThreadLocal<PointerBuffer>() {
@Override
protected PointerBuffer initialValue() {
return PointerBuffer.allocateDirect(1);
}
};
@Override
public final long getUInt32Long(int key) {
final ByteBuffer buffer = getBB(4).putInt(0, 0);
final int ret = getInfo(key, 4, buffer, null);
CLException.checkForError(ret, "error while asking for info value");
return Bitstream.toUInt32Long(buffer.getInt(0));
}
@Override
public final long getLong(int key) {
ByteBuffer buffer = getBB(8).putLong(0, 0);
int ret = getInfo(key, 8, buffer, null);
CLException.checkForError(ret, "error while asking for info value");
return buffer.getLong(0);
}
@Override
public final String getString(int key) {
PointerBuffer sizeBuffer = getNSB();
int ret = getInfo(key, 0, null, sizeBuffer);
CLException.checkForError(ret, "error while asking for info string");
int clSize = (int)sizeBuffer.get(0);
ByteBuffer buffer = getBB(clSize);
ret = getInfo(key, buffer.capacity(), buffer, null);
CLException.checkForError(ret, "error while asking for info string");
byte[] array = new byte[clSize];
buffer.get(array).rewind();
return CLUtil.clString2JavaString(array, clSize);
}
@Override
public final int[] getInts(int key, int n) {
// FIXME: Really 8 bytes per int on 64bit platforms ?
ByteBuffer buffer = getBB(n * (Platform.is32Bit()?4:8));
int ret = getInfo(key, buffer.capacity(), buffer, null);
CLException.checkForError(ret, "error while asking for info value");
int[] array = new int[n];
for(int i = 0; i < array.length; i++) {
if(Platform.is32Bit()) {
array[i] = buffer.getInt();
}else{
array[i] = (int)buffer.getLong();
}
}
buffer.rewind();
return array;
}
protected ByteBuffer getBB(int minCapacity) {
if(minCapacity > BB_SIZE) {
return Buffers.newDirectByteBuffer(minCapacity);
}else{
return localBB.get();
}
}
protected PointerBuffer getNSB() {
return localNSB.get();
}
protected abstract int getInfo(int name, long valueSize, Buffer value, PointerBuffer valueSizeRet);
}
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