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diff --git a/src/java/com/jogamp/common/util/PrimitiveStack.java b/src/java/com/jogamp/common/util/PrimitiveStack.java
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+++ b/src/java/com/jogamp/common/util/PrimitiveStack.java
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+/**
+ * Copyright 2012 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.common.util;
+
+/**
+ * Simple primitive-type stack.
+ */
+public interface PrimitiveStack {
+    
+    /** 
+     * Returns this stack's current capacity.
+     * <p>
+     * The capacity may grow with a put operation w/ insufficient {@link #remaining()} elements left, if {@link #getGrowSize()} &gt; 0.
+     * </p> 
+     */
+    int capacity();
+    
+    /** 
+     * Returns the current position where the next put operation will store the next element.
+     * <p>
+     * The position equals to the number of elements already stored.
+     * </p>
+     * <p> 
+     * 0 denotes an empty stack.
+     * </p>
+     **/
+    int position();
+    
+    /** 
+     * Returns the remaining elements left before stack will grow about {@link #getGrowSize()}.
+     * <pre>
+     *   remaining := capacity() - position();
+     * </pre>
+     * <p> 
+     * 0 denotes a full stack.
+     * </p> 
+     * @see #capacity()
+     * @see #position()
+     **/
+    int remaining();
+    
+    /** Returns the grow size. A stack grows by this size in case a put operation exceeds it's {@link #capacity()}. */
+    int getGrowSize();
+
+    /** Set new {@link #growSize(). */
+    void setGrowSize(int newGrowSize);
+}