1 files changed, 108 insertions, 0 deletions
diff --git a/hicn-light/src/hicn/core/content_store.h b/hicn-light/src/hicn/core/content_store.h
new file mode 100644
index 000000000..ceaf05e6b
--- /dev/null
+++ b/hicn-light/src/hicn/core/content_store.h
@@ -0,0 +1,108 @@
+#ifndef HICNLIGHT_CS_H
+#define HICNLIGHT_CS_H
+
+#include <hicn/util/pool.h>
+#include "../content_store/lru.h"
+#include "msgbuf_pool.h"
+
+#define INVALID_ENTRY_ID ~0ul /* off_t */
+#define DEFAULT_CS_SIZE 256   // Fixed CS size
+
+typedef struct {
+  off_t msgbuf_id;
+  struct {
+    off_t prev;
+    off_t next;
+  } lru;
+} cs_entry_t;
+
+#define cs_entry_get_msgbuf_id(entry) ((entry)->msgbuf_id)
+
+typedef enum {
+  CS_TYPE_UNDEFINED,
+  CS_TYPE_LRU,
+  CS_TYPE_N,
+} cs_type_t;
+
+#define CS_TYPE_VALID(type) (type != CS_TYPE_UNDEFINED) && (type != CS_TYPE_N)
+
+typedef struct {
+  /* The maximum allowed expiry time (will never be exceeded). */
+  uint64_t max_expiry_time;  // XXX part of lru ?
+} cs_options_t;
+
+typedef struct {
+  cs_type_t type;
+  int num_entries;
+  size_t max_size;
+  cs_lru_state_t lru;
+  union {
+    cs_lru_stats_t lru;
+  } stats;
+} cs_t;
+
+/**
+ * @brief Create a new content store  (extended parameters).
+ *
+ * @param[in] type Content store type
+ * @param[in] max_size Maximum size (0 = use default value)
+ *
+ * @return cs_t* - The newly created content store
+ */
+cs_t *_cs_create(cs_type_t type, size_t max_size);
+
+/**
+ * @brief Create a new content store
+ *
+ * @param[in] size Maximum content store size
+ *
+ * @return cs_t* - The newly created content store
+ */
+#define cs_create(size) _cs_create(CS_TYPE_LRU, (size))
+
+/**
+ * @brief Free a content store data structure.
+ *
+ * @param[in] pool_ptr Pointer to the content store to free
+ */
+void cs_free(cs_t *cs);
+
+/**
+ * @brief Clear the content of the content store (helper).
+ *
+ * @param[in, out] cs Pointer to the content store to clear
+ */
+void _cs_clear(cs_t **cs);
+
+/**
+ * @brief Clear the content of the content store.
+ *
+ * @param[in, out] cs Pointer to the content store to clear
+ */
+#define cs_clear(cs) _cs_clear((cs_t **)&cs);
+
+/**
+ * @brief Update content store statistics upon CS hit event.
+ *
+ * @param[in] cs Pointer to the content store to use
+ */
+void cs_hit(cs_t *cs);
+
+/**
+ * @brief Update content store statistics upon CS miss event.
+ *
+ * @param[in] cs Pointer to the content store to use
+ */
+void cs_miss(cs_t *cs);
+
+/**
+ * @brief Log content store statistics, e.g. the CS current and maximum size,
+ * the number of matches, misses, add operations, update operations, evictions.
+ *
+ * @param cs Pointer to the CS data structure to use
+ */
+void cs_log(cs_t *cs);
+
+cs_lru_stats_t cs_get_lru_stats(cs_t *cs);
+
+#endif /* HICNLIGHT_CS_H */