From e76a3649db4611ac0531cbb5fc8e555a039b93f3 Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Sat, 22 Apr 2023 10:20:25 -0600
Subject: [PATCH] [atomic] Comment

---
 src/hb-atomic.hh | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/hb-atomic.hh b/src/hb-atomic.hh
index a6283de14..4c1587bfb 100644
--- a/src/hb-atomic.hh
+++ b/src/hb-atomic.hh
@@ -38,6 +38,10 @@
 
 /*
  * Atomic integers and pointers.
+ *
+ * hb_atomic_int_t and hb_atomic_ptr_t are typedefs to the actual
+ * atomic type.  They are guaranteed to be at least 32 bits wide.
+ * hb_atomic_int_t is signed.
  */