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package com.mbien.opencl;
import java.lang.reflect.Field;
import java.nio.Buffer;
import sun.misc.Unsafe;
/**
*
* @author Michael Bien
*/
class InternalBufferUtil {
private static final long addressFieldOffset;
private static Unsafe unsafe;
static {
try {
Field f = Buffer.class.getDeclaredField("address");
Field[] fields = Unsafe.class.getDeclaredFields();
for (int i = 0; i < fields.length; i++) {
if (fields[i].getName().equals("theUnsafe")) {
fields[i].setAccessible(true);
unsafe = (Unsafe)fields[i].get(Unsafe.class);
break;
}
}
addressFieldOffset = unsafe.objectFieldOffset(f);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
public static long getDirectBufferAddress(Buffer buffer) {
return ((buffer == null) ? 0 : unsafe.getLong(buffer, addressFieldOffset));
}
}
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