From 964fea7500f4bcba3bf2629e959df415ee0ce48f Mon Sep 17 00:00:00 2001
From: Matthew Sotoudeh <matthew@masot.net>
Date: Thu, 16 May 2024 11:15:19 -0700
Subject: more documentation

---
 magic_buddy.c | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'magic_buddy.c')

diff --git a/magic_buddy.c b/magic_buddy.c
index a741132..1e88c21 100644
--- a/magic_buddy.c
+++ b/magic_buddy.c
@@ -311,3 +311,11 @@ int shrink_buddy(size_t new_size, struct buddy *state) {
     state->root_logsize = logsize;
     return 1;
 }
+
+void move_buddy(struct buddy *new_state, struct buddy *old_state) {
+    memcpy(new_state, old_state, sizeof(struct buddy));
+    for (size_t i = 0; i < ADDRESS_BITS; i++) {
+        if (!new_state->avail[i]) continue;
+        new_state->avail[i]->pprev = &(new_state->avail[i]);
+    }
+}
-- 
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