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r6513: Commit talloc_free_children.

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Volker
(This used to be commit 9fa26d2c97)
This commit is contained in:
Volker Lendecke 2005-04-28 14:54:17 +00:00 committed by Gerald (Jerry) Carter
parent c23d22e4f1
commit a53548d074
2 changed files with 45 additions and 20 deletions
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57
source4/lib/talloc/talloc.c
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@ -461,6 +461,42 @@ 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.
*/
void talloc_free_children(void *ptr)
{
struct talloc_chunk *tc;
if (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
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->child+1;
const void *new_parent = null_context;
if (tc->child->refs) {
struct talloc_chunk *p = talloc_parent_chunk(tc->child->refs);
if (p) new_parent = p+1;
}
if (talloc_free(child) == -1) {
if (new_parent == null_context) {
struct talloc_chunk *p = talloc_parent_chunk(ptr);
if (p) new_parent = p+1;
}
talloc_steal(new_parent, child);
}
}
}
/*
free a talloc pointer. This also frees all child pointers of this
@ -498,26 +534,7 @@ int talloc_free(void *ptr)
tc->destructor = NULL;
}
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->child+1;
const void *new_parent = null_context;
if (tc->child->refs) {
struct talloc_chunk *p = talloc_parent_chunk(tc->child->refs);
if (p) new_parent = p+1;
}
if (talloc_free(child) == -1) {
if (new_parent == null_context) {
struct talloc_chunk *p = talloc_parent_chunk(ptr);
if (p) new_parent = p+1;
}
talloc_steal(new_parent, child);
}
}
talloc_free_children(ptr);
if (tc->parent) {
_TLIST_REMOVE(tc->parent->child, tc);

8
source4/lib/talloc/talloc_guide.txt
View File

@ -105,6 +105,14 @@ For more control on which parent is removed, see talloc_unlink()
talloc_free() operates recursively on its children.
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
int talloc_free_children(void *ptr);
The talloc_free_children() walks along the list of all children of a
talloc context and talloc_free()s only the children, not the context
itself.
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
void *talloc_reference(const void *context, const void *ptr);