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diff --git a/hicn-light/src/hicn/content_store/lru.h b/hicn-light/src/hicn/content_store/lru.h
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+++ b/hicn-light/src/hicn/content_store/lru.h
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+/*
+ * Copyright (c) 2017-2019 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef HICNLIGHT_CONTENT_STORE_LRU_H
+#define HICNLIGHT_CONTENT_STORE_LRU_H
+
+typedef struct {
+    // This LRU is just for keeping track of insertion and access order.
+    //ListLru *lru;
+    void * lru;
+} content_store_lru_data_t;
+
+typedef struct {
+    uint64_t countExpiryEvictions;
+    uint64_t countRCTEvictions;
+    uint64_t countLruEvictions;
+    uint64_t countAdds;
+    uint64_t countHits;
+    uint64_t countMisses;
+} content_store_lru_stats_t;
+
+#endif /* HICNLIGHT_CONTENT_STORE_LRU_H */