extension: free will perserve errno

Signed-off-by: Mattias Andrée <maandree@member.fsf.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/include/slibc-alloc.h b/include/slibc-alloc.h
index 928218d..7da40f9 100644
--- a/include/slibc-alloc.h
+++ b/include/slibc-alloc.h
@@ -128,6 +128,8 @@ enum falloc_mode
  * This function is identical to `free`, except it is guaranteed not to
  * override the memory segment with zeroes before freeing the allocation.
  * 
+ * `errno` is guaranteed not to be set.
+ * 
  * @etymology  (Fast) variant of (`free`).
  * 
  * @param  segment  The memory segment to free.
@@ -140,6 +142,8 @@ void fast_free(void*);
  * This function is identical to `free`, except it is guaranteed to
  * override the memory segment with zeroes before freeing the allocation.
  * 
+ * `errno` is guaranteed not to be set.
+ * 
  * @etymology  (Secure) variant of (`free`).
  * 
  * @param  segment  The memory segment to free.