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diff --git a/src/java/jogamp/common/os/DynamicLinkerImpl.java b/src/java/jogamp/common/os/DynamicLinkerImpl.java
new file mode 100644
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+++ b/src/java/jogamp/common/os/DynamicLinkerImpl.java
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+/**
+ * Copyright 2013 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 jogamp.common.os;
+
+import com.jogamp.common.os.DynamicLinker;
+import com.jogamp.common.util.LongObjectHashMap;
+
+/* pp */ abstract class DynamicLinkerImpl implements DynamicLinker {
+
+  //
+  // Package private scope of class w/ protected native code access
+  // and sealed jogamp.common.* package definition
+  // ensuring no abuse via subclassing.
+  //
+    
+  private final LongObjectHashMap libHandle2Name = new LongObjectHashMap( 16 /* initialCapacity */ );
+  
+  protected static final class LibRef {
+      public LibRef(String name) {
+          this.name = name;
+          this.refCount = 1;
+      }
+      public final int incrRefCount() { return ++refCount; }
+      public final int decrRefCount() { return --refCount; }
+      public final int getRefCount() { return refCount; }
+      
+      public final String getName() { return name; }
+      public final String toString() { return "LibRef["+name+", refCount "+refCount+"]"; }
+      
+      private final String name;
+      private int refCount;
+  }
+  
+  protected final synchronized LibRef getLibRef(long handle) {
+      return (LibRef) libHandle2Name.get(handle);
+  }
+  
+  protected final synchronized LibRef incrLibRefCount(long handle, String libName) {
+      LibRef libRef = getLibRef(handle);
+      if( null == libRef ) {
+          libRef = new LibRef(libName);
+          libHandle2Name.put(handle, libRef);
+      } else {
+          libRef.incrRefCount();
+      }
+      if(DEBUG) {
+          System.err.println("DynamicLinkerImpl.incrLibRefCount 0x"+Long.toHexString(handle)+ " -> "+libRef+", libs loaded "+libHandle2Name.size());
+      }
+      return libRef;
+  }
+  
+  protected final synchronized LibRef decrLibRefCount(long handle) {
+      LibRef libRef = getLibRef(handle);
+      if( null != libRef ) {
+          if( 0 == libRef.decrRefCount() ) {
+              libHandle2Name.remove(handle);
+          }
+      }
+      if(DEBUG) {
+          System.err.println("DynamicLinkerImpl.decrLibRefCount 0x"+Long.toHexString(handle)+ " -> "+libRef+", libs loaded "+libHandle2Name.size());
+      }
+      return libRef;
+  }
+
+}