commit 071a2bb4f7e433eabb21e38cd560cc4dcfacab7d
author Behdad Esfahbod <behdad@behdad.org> Sat Dec 03 13:03:38 2022 -0700
committer Behdad Esfahbod <behdad@behdad.org> Sat Dec 03 13:03:38 2022 -0700
tree 2e67c45e248fdd8191d248987eef38aa8c0106bc
parent 44a5de3a97c6092547d4994c7b10922fbdce15b8

[serialize] Support zerocopy while sharing

src/hb-serialize.hh

diff --git a/src/hb-serialize.hh b/src/hb-serialize.hh
index 9aeed14..d557328 100644
--- a/src/hb-serialize.hh
+++ b/src/hb-serialize.hh
@@ -348,8 +348,8 @@
     assert (obj->head <= obj->tail);
     unsigned len = obj->tail - obj->head;
     head = zerocopy ? zerocopy : obj->head; /* Rewind head. */
-    if (zerocopy)
-      assert (!share);
+    bool was_zerocopy = zerocopy;
+    zerocopy = nullptr;
 
     if (!len)
     {
@@ -373,11 +373,8 @@
     }
 
     tail -= len;
-    if (zerocopy)
-    {
-      zerocopy = nullptr;
+    if (was_zerocopy)
       assert (tail == obj->head);
-    }
     else
       memmove (tail, obj->head, len);