1 files changed, 39 insertions, 0 deletions
diff --git a/src/com/mbien/opencl/InternalBufferUtil.java b/src/com/mbien/opencl/InternalBufferUtil.java
new file mode 100644
index 00000000..a2573784
--- /dev/null
+++ b/src/com/mbien/opencl/InternalBufferUtil.java
@@ -0,0 +1,39 @@
+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));
+    }
+
+}
+\ No newline at end of file