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diff --git a/EASTL/source/intrusive_list.cpp b/EASTL/source/intrusive_list.cpp
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+++ b/EASTL/source/intrusive_list.cpp
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+///////////////////////////////////////////////////////////////////////////////
+// Copyright (c) Electronic Arts Inc. All rights reserved.
+///////////////////////////////////////////////////////////////////////////////
+
+#include <EASTL/intrusive_list.h>
+
+
+namespace eastl
+{
+
+
+	EASTL_API void intrusive_list_base::reverse() EA_NOEXCEPT
+	{
+		intrusive_list_node* pNode = &mAnchor;
+		do {
+			intrusive_list_node* const pTemp = pNode->mpNext;
+			pNode->mpNext = pNode->mpPrev;
+			pNode->mpPrev = pTemp;
+			pNode         = pNode->mpPrev;
+		} 
+		while(pNode != &mAnchor);
+	}
+
+
+
+	EASTL_API bool intrusive_list_base::validate() const
+	{
+		const intrusive_list_node *p = &mAnchor;
+		const intrusive_list_node *q = p;
+
+		// We do two tests below:
+		//
+		// 1) Prev and next pointers are symmetric. We check (p->next->prev == p)
+		//    for each node, which is enough to verify all links.
+		//
+		// 2) Loop check. We bump the q pointer at one-half rate compared to the
+		//    p pointer; (p == q) if and only if we are at the start (which we
+		//    don't check) or if there is a loop somewhere in the list.
+
+		do {
+			// validate node (even phase)
+			if (p->mpNext->mpPrev != p)
+				return false;               // broken linkage detected
+
+			// bump only fast pointer
+			p = p->mpNext;
+			if (p == &mAnchor)
+				break;
+
+			if (p == q)
+				return false;               // loop detected
+
+			// validate node (odd phase)
+			if (p->mpNext->mpPrev != p)
+				return false;               // broken linkage detected
+
+			// bump both pointers
+			p = p->mpNext;
+			q = q->mpNext;
+
+			if (p == q)
+				return false;               // loop detected
+
+		} while(p != &mAnchor);
+
+		return true;
+	}
+
+
+} // namespace eastl
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