diff --git a/CommonLibs/LinkedLists.h b/CommonLibs/LinkedLists.h
new file mode 100644
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+++ b/CommonLibs/LinkedLists.h
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+/*
+* Copyright 2008 Free Software Foundation, Inc.
+*
+* This software is distributed under multiple licenses; see the COPYING file in the main directory for licensing information for this specific distribuion.
+*
+* This software is distributed under the terms of the GNU Affero Public License.
+* See the COPYING file in the main directory for details.
+*
+* This use of this software may be subject to additional restrictions.
+* See the LEGAL file in the main directory for details.
+
+	This program is free software: you can redistribute it and/or modify
+	it under the terms of the GNU Affero General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU Affero General Public License for more details.
+
+	You should have received a copy of the GNU Affero General Public License
+	along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+
+
+#ifndef LINKEDLISTS_H
+#define LINKEDLISTS_H
+
+#include <stdlib.h>
+
+
+
+/** This node class is used to build singly-linked lists. */
+class ListNode {
+
+	private:
+
+	ListNode* mNext;
+	void* mData;
+
+	public:
+
+	ListNode* next() { return mNext; }
+	void next(ListNode* wNext) { mNext=wNext; }
+
+	void* data() { return mData; }
+	void data(void* wData) { mData=wData; }
+};
+
+
+
+
+/** A fast FIFO for pointer-based storage. */
+class PointerFIFO {
+
+	private:
+
+	ListNode* mHead;		///< points to next item out
+	ListNode* mTail;		///< points to last item in
+	ListNode* mFreeList;	///< pool of previously-allocated nodes
+	unsigned mSize;			///< number of items in the FIFO
+
+	public:
+
+	PointerFIFO()
+		:mHead(NULL),mTail(NULL),mFreeList(NULL),
+		mSize(0)
+	{}
+
+	unsigned size() const { return mSize; }
+
+	/** Put an item into the FIFO. */
+	void put(void* val);
+
+	/**
+		Take an item from the FIFO.
+		Returns NULL for empty list.
+	*/
+	void* get();
+
+
+	private:
+
+	/** Allocate a new node to extend the FIFO. */
+	ListNode *allocate();
+
+	/** Release a node to the free pool after removal from the FIFO. */
+	void release(ListNode* wNode);
+
+};
+
+
+
+
+
+#endif
+// vim: ts=4 sw=4