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authorStefan Metzmacher <metze@samba.org>2011-05-17 08:50:45 +0200
committerStefan Metzmacher <metze@samba.org>2011-05-17 10:49:13 +0200
commitdf2cb2f672569e5d113fe2e77fdc1ee16c8b646d (patch)
tree3e1278acabe8689e42c47fe748fc207ad8014389 /lib
parent38633c9f0b7f86673f08903999583ad5b62c3548 (diff)
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talloc: splitout _talloc_free_children_internal()
metze Autobuild-User: Stefan Metzmacher <metze@samba.org> Autobuild-Date: Tue May 17 10:49:13 CEST 2011 on sn-devel-104
Diffstat (limited to 'lib')
-rw-r--r--lib/talloc/talloc.c77
1 files changed, 27 insertions, 50 deletions
diff --git a/lib/talloc/talloc.c b/lib/talloc/talloc.c
index 8333f41c07..4700aa99e8 100644
--- a/lib/talloc/talloc.c
+++ b/lib/talloc/talloc.c
@@ -768,6 +768,10 @@ static inline void _talloc_free_poolmem(struct talloc_chunk *tc,
}
}
+static inline void _talloc_free_children_internal(struct talloc_chunk *tc,
+ void *ptr,
+ const char *location);
+
/*
internal talloc_free call
*/
@@ -838,41 +842,7 @@ static inline int _talloc_free_internal(void *ptr, const char *location)
tc->flags |= TALLOC_FLAG_LOOP;
- while (tc->child) {
- /* we need to work out who will own an abandoned child
- if it cannot be freed. In priority order, the first
- choice is owner of any remaining reference to this
- pointer, the second choice is our parent, and the
- final choice is the null context. */
- void *child = TC_PTR_FROM_CHUNK(tc->child);
- const void *new_parent = null_context;
- struct talloc_chunk *old_parent = NULL;
- if (unlikely(tc->child->refs)) {
- struct talloc_chunk *p = talloc_parent_chunk(tc->child->refs);
- if (p) new_parent = TC_PTR_FROM_CHUNK(p);
- }
- /* finding the parent here is potentially quite
- expensive, but the alternative, which is to change
- talloc to always have a valid tc->parent pointer,
- makes realloc more expensive where there are a
- large number of children.
-
- The reason we need the parent pointer here is that
- if _talloc_free_internal() fails due to references
- or a failing destructor we need to re-parent, but
- the free call can invalidate the prev pointer.
- */
- if (new_parent == null_context && (tc->child->refs || tc->child->destructor)) {
- old_parent = talloc_parent_chunk(ptr);
- }
- if (unlikely(_talloc_free_internal(child, location) == -1)) {
- if (new_parent == null_context) {
- struct talloc_chunk *p = old_parent;
- if (p) new_parent = TC_PTR_FROM_CHUNK(p);
- }
- _talloc_steal_internal(new_parent, child);
- }
- }
+ _talloc_free_children_internal(tc, ptr, location);
tc->flags |= TALLOC_FLAG_FREE;
@@ -1264,21 +1234,10 @@ _PUBLIC_ void *talloc_init(const char *fmt, ...)
return ptr;
}
-/*
- this is a replacement for the Samba3 talloc_destroy_pool functionality. It
- should probably not be used in new code. It's in here to keep the talloc
- code consistent across Samba 3 and 4.
-*/
-_PUBLIC_ void talloc_free_children(void *ptr)
+static inline void _talloc_free_children_internal(struct talloc_chunk *tc,
+ void *ptr,
+ const char *location)
{
- struct talloc_chunk *tc;
-
- if (unlikely(ptr == NULL)) {
- return;
- }
-
- tc = talloc_chunk_from_ptr(ptr);
-
while (tc->child) {
/* we need to work out who will own an abandoned child
if it cannot be freed. In priority order, the first
@@ -1306,7 +1265,7 @@ _PUBLIC_ void talloc_free_children(void *ptr)
if (new_parent == null_context && (tc->child->refs || tc->child->destructor)) {
old_parent = talloc_parent_chunk(ptr);
}
- if (unlikely(_talloc_free_internal(child, __location__) == -1)) {
+ if (unlikely(_talloc_free_internal(child, location) == -1)) {
if (new_parent == null_context) {
struct talloc_chunk *p = old_parent;
if (p) new_parent = TC_PTR_FROM_CHUNK(p);
@@ -1316,6 +1275,24 @@ _PUBLIC_ void talloc_free_children(void *ptr)
}
}
+/*
+ this is a replacement for the Samba3 talloc_destroy_pool functionality. It
+ should probably not be used in new code. It's in here to keep the talloc
+ code consistent across Samba 3 and 4.
+*/
+_PUBLIC_ void talloc_free_children(void *ptr)
+{
+ struct talloc_chunk *tc;
+
+ if (unlikely(ptr == NULL)) {
+ return;
+ }
+
+ tc = talloc_chunk_from_ptr(ptr);
+
+ _talloc_free_children_internal(tc, ptr, __location__);
+}
+
/*
Allocate a bit of memory as a child of an existing pointer
*/