kern/rdxtree: provide a lockless-aware slot load accessor

1 files changed, 8 insertions, 0 deletions

diff --git a/kern/rdxtree.h b/kern/rdxtree.h
index 02ae048..a30512c 100644
--- a/kern/rdxtree.h
+++ b/kern/rdxtree.h
@@ -29,6 +29,8 @@
 #include <stddef.h>
 #include <stdint.h>
 
+#include <kern/llsync.h>
+
 typedef uint64_t rdxtree_key_t;
 
 /*
@@ -154,6 +156,12 @@ rdxtree_lookup_slot(const struct rdxtree *tree, rdxtree_key_t key)
     return rdxtree_lookup_common(tree, key, 1);
 }
 
+static inline void *
+rdxtree_load_slot(void **slot)
+{
+    return llsync_read_ptr(*slot);
+}
+
 /*
  * Replace a pointer in a tree.
  *