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authorAndrew Bartlett <abartlet@samba.org>2005-03-24 08:00:15 +0000
committerGerald (Jerry) Carter <jerry@samba.org>2007-10-10 13:11:16 -0500
commitae1ea5619b18be9c37f9647756e06718b17b88f2 (patch)
treebdb20541c44c062cf9099b170a3cd8580d3d848e /source4
parenta19d002ceea84b0b7350b1b3ebf181a03ac5b494 (diff)
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r6033: Patch from 'lifeless' to clarify behaviour with NULL pointers.
Andrew Bartlett (This used to be commit 48c518796797f021c9c7f319ca8cd0a0c185f64c)
Diffstat (limited to 'source4')
-rw-r--r--source4/lib/talloc/talloc.c3
-rw-r--r--source4/lib/talloc/talloc_guide.txt1
2 files changed, 3 insertions, 1 deletions
diff --git a/source4/lib/talloc/talloc.c b/source4/lib/talloc/talloc.c
index 31796a247b..0d78dd8d24 100644
--- a/source4/lib/talloc/talloc.c
+++ b/source4/lib/talloc/talloc.c
@@ -609,7 +609,8 @@ void *_talloc_realloc(const void *context, void *ptr, size_t size, const char *n
/*
move a lump of memory from one talloc context to another return the
- ptr on success, or NULL if it could not be transferred
+ ptr on success, or NULL if it could not be transferred.
+ passing NULL as ptr will always return NULL with no side effects.
*/
void *talloc_steal(const void *new_ctx, const void *ptr)
{
diff --git a/source4/lib/talloc/talloc_guide.txt b/source4/lib/talloc/talloc_guide.txt
index 4ab0f8eacc..aca3ab4937 100644
--- a/source4/lib/talloc/talloc_guide.txt
+++ b/source4/lib/talloc/talloc_guide.txt
@@ -306,6 +306,7 @@ NOTE: It is possible to produce loops in the parent/child relationship
if you are not careful with talloc_steal(). No guarantees are provided
as to your sanity or the safety of your data if you do this.
+talloc_steal (new_ctx, NULL) will return NULL with no sideeffects.
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
off_t talloc_total_size(const void *ptr);