+STATIC void a_map_delete(pTHX_ const OP *o) {
+#define a_map_delete(O) a_map_delete(aTHX_ (O))
+#ifdef USE_ITHREADS
+ MUTEX_LOCK(&a_op_map_mutex);
+#endif
+
+ ptable_map_store(a_op_map, o, NULL);
+
+#ifdef USE_ITHREADS
+ MUTEX_UNLOCK(&a_op_map_mutex);
+#endif
+}
+