From b8be29fee61c46170dc087ee72b88a84ef9f8d21 Mon Sep 17 00:00:00 2001
From: Matthijs Mekking <matthijs@isc.org>
Date: Tue, 4 Feb 2020 11:00:58 +0100
Subject: [PATCH] Add a note on memory allocation

isc__memalloc_t must deal with memory allocation failure
and must never return NULL.
---
 lib/isc/mem.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/isc/mem.c b/lib/isc/mem.c
index c65d9219d6..30399bf81f 100644
--- a/lib/isc/mem.c
+++ b/lib/isc/mem.c
@@ -126,6 +126,11 @@ static isc_mutex_t		contextslock;
  */
 static uint64_t		totallost;
 
+/*%
+ * Memory allocation and free function definitions.
+ * isc__memalloc_t must deal with memory allocation failure
+ * and must never return NULL.
+ */
 typedef void * (*isc__memalloc_t)(size_t);
 typedef void (*isc__memfree_t)(void *);