+ * @param fsh fifo segment header
+ * @param slice_index slice where chunks should be alocated
+ * @param chunk_size chunk size needed
+ * @return chunk (or chunks) that cover at least chunk_size bytes
+ * on success, 0 on failure.
+ */
+svm_fifo_chunk_t *fsh_alloc_chunk (fifo_segment_header_t * fsh,
+ u32 slice_index, u32 chunk_size);
+
+/**
+ * Return chunks to fifo segment
+ *
+ * @param fsh fifo segment header
+ * @param slice_index slice where chunks should be returned
+ * @param c pointer to first chunk in 0 terminated linked list
+ */
+void fsh_collect_chunks (fifo_segment_header_t * fsh, u32 slice_index,
+ svm_fifo_chunk_t * c);
+
+/**
+ * Fifo segment has reached mem limit
+ *
+ * @param fsh fifo segment header
+ * @return 1 (if reached) or 0 (otherwise)
+ */
+u8 fsh_has_reached_mem_limit (fifo_segment_header_t * fsh);
+
+/**
+ * Fifo segment reset mem limit flag
+ *
+ * @param fs fifo segment
+ */
+void fsh_reset_mem_limit (fifo_segment_header_t * fsh);
+
+/**
+ * Fifo segment allocated size
+ *
+ * Returns fifo segment's allocated size
+ *
+ * @param fs fifo segment
+ * @return allocated size in bytes
+ */
+uword fifo_segment_size (fifo_segment_t * fs);
+
+/**
+ * Fifo segment estimate of number of free bytes
+ *
+ * Returns fifo segment's internal estimate of the number of free bytes.
+ * To force a synchronization between the segment and the underlying
+ * memory allocator, call @ref fifo_segment_update_free_bytes
+ *
+ * @param fs fifo segment
+ * @return free bytes estimate