From 8ec0da02484857618b730e807b80de8eb24e7a2b Mon Sep 17 00:00:00 2001
From: Roland Conybeare <rconybeare@gmail.com>
Date: Fri, 1 May 2026 20:14:26 -0400
Subject: [PATCH] xo-object2 stack: RAllocator.assign_barrier() works.

use for DList::assign_head(), DArray::assign_at().
---
 include/xo/alloc2/Allocator.hpp            |  6 +-----
 include/xo/alloc2/Allocator_basic.hpp      |  2 --
 include/xo/alloc2/alloc/RAllocator_aux.hpp | 18 ++++++++++++++----
 3 files changed, 15 insertions(+), 11 deletions(-)

diff --git a/include/xo/alloc2/Allocator.hpp b/include/xo/alloc2/Allocator.hpp
index 096b7b8..9e7230d 100644
--- a/include/xo/alloc2/Allocator.hpp
+++ b/include/xo/alloc2/Allocator.hpp
@@ -5,11 +5,7 @@
 
 #pragma once
 
-#include "alloc/AAllocator.hpp"
-#include "alloc/IAllocator_Any.hpp"
-#include "alloc/IAllocator_Xfer.hpp"
-#include "alloc/RAllocator.hpp"
-
+#include "Allocator_basic.hpp"
 #include "alloc/RAllocator_aux.hpp"
 
 /* end Allocator.hpp */
diff --git a/include/xo/alloc2/Allocator_basic.hpp b/include/xo/alloc2/Allocator_basic.hpp
index df998cd..60e4e98 100644
--- a/include/xo/alloc2/Allocator_basic.hpp
+++ b/include/xo/alloc2/Allocator_basic.hpp
@@ -10,6 +10,4 @@
 #include "alloc/IAllocator_Xfer.hpp"
 #include "alloc/RAllocator.hpp"
 
-//#include "alloc/RAllocator_aux.hpp"
-
 /* end Allocator_basic.hpp */
diff --git a/include/xo/alloc2/alloc/RAllocator_aux.hpp b/include/xo/alloc2/alloc/RAllocator_aux.hpp
index 2b296a9..b6e6f0d 100644
--- a/include/xo/alloc2/alloc/RAllocator_aux.hpp
+++ b/include/xo/alloc2/alloc/RAllocator_aux.hpp
@@ -3,7 +3,7 @@
  *  Out-of-line definitions for RAllocator template methods
  *  that depend on RGCObject (avoiding #include cycle in RAllocator.hpp)
  *
- *  Would aspire to Include via user_hpp_includes in Allocator.json5,
+ *  Would aspire to include via user_hpp_includes in Allocator.json5,
  *  if/when that exists
  *
  *  @author Roland Conybeare
@@ -17,15 +17,25 @@
 namespace xo {
     namespace mm {
 
+        /** NOTE:
+         *  this definition is incorporated into [Allocator.hpp],
+         *  while consciously omitted from [Allocator_basic.hpp].
+         *
+         *  Some .hpp files in {xo-alloc2/, xo-gc/} can
+         *  only include [Allocator_basic.hpp].
+         *
+         *  Translation units that want to invoke
+         *  barrier_assign() must #include Allocator.hpp
+         **/
         template <typename Object>
         void
         RAllocator<Object>::barrier_assign(void * parent,
                                            obj<AGCObject> * p_lhs,
                                            obj<AGCObject> rhs) noexcept
         {
-            (void)parent;
-            (void)p_lhs;
-            (void)rhs;
+            this->barrier_assign_aux(parent,
+                                     p_lhs->iface(), p_lhs->opaque_data_addr(),
+                                     rhs.iface(), rhs.opaque_data());
         }
 
     } /*namespace mm*/