X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~mdw/git/adns/blobdiff_plain/11c8bf9bc50213e3774f8367ce3d5b17b2f95c49..f47cdeec5fbda82dc74d506f24e069558ee51a2c:/src/internal.h

diff --git a/src/internal.h b/src/internal.h
index 24e69a8..a20dd93 100644
--- a/src/internal.h
+++ b/src/internal.h
@@ -317,6 +317,9 @@ void *adns__alloc_interim(adns_query qu, size_t sz);
  *
  * _alloc_interim can fail, in which case it will fail the query too,
  * so nothing more need be done with it.
+ *
+ * adns__alloc_interim(qu,0) will not return 0, but it will not
+ * necessarily return a distinct pointer each time.
  */
 
 void *adns__alloc_mine(adns_query qu, size_t sz);
@@ -326,7 +329,7 @@ void *adns__alloc_mine(adns_query qu, size_t sz);
  */
 
 void *adns__alloc_final(adns_query qu, size_t sz);
-/* Cannot fail.
+/* Cannot fail, and cannot return 0.
  */
 
 void adns__makefinal_block(adns_query qu, void **blpp, size_t sz);