+
+
+/**
+ * @brief Barrier sync if a dpo pool is about to expand
+ *
+ * @param VM (output)
+ * vlib_main_t *, invariably &vlib_global_main
+ *
+ * @param P
+ * pool pointer
+ *
+ * @param YESNO (output)
+ * typically a u8, 1 => expand will occur, worker barrier held
+ * 0 => no expand, barrier not held
+ *
+ * @return YESNO set
+ */
+
+#define dpo_pool_barrier_sync(VM,P,YESNO) \
+do { \
+ pool_get_aligned_will_expand ((P), YESNO, CLIB_CACHE_LINE_BYTES); \
+ \
+ if (YESNO) \
+ { \
+ VM = vlib_get_main(); \
+ ASSERT ((VM)->thread_index == 0); \
+ vlib_worker_thread_barrier_sync((VM)); \
+ } \
+} while(0);
+
+/**
+ * @brief Release barrier sync after dpo pool expansion
+ *
+ * @param VM
+ * vlib_main_t pointer, must be &vlib_global_main
+ *
+ * @param YESNO
+ * typically a u8, 1 => release required
+ * 0 => no release required
+ * @return none
+ */
+
+#define dpo_pool_barrier_release(VM,YESNO) \
+ if ((YESNO)) vlib_worker_thread_barrier_release((VM));
+