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authorHarald Welte <laforge@gnumonks.org>2015-12-05 23:38:18 +0100
committerHarald Welte <laforge@gnumonks.org>2015-12-05 23:38:18 +0100
commit90e614f7ccb0902e6ddb510bb10f78eb14a13d94 (patch)
treeb9e4d2365e3d387f1aebcee6bf0e32b4f4f1ff12 /src/talloc.c
parentee702cd590688c1e65296319c5bc4c9cf160ba65 (diff)
remove our internal copy of talloc, use system libtalloc
Shipping our own private copy of talloc was a good idea in 2008, when it was not readily available on most target platforms. Today, the situation is quite different, as it is a standard library on major Linux distributions.
Diffstat (limited to 'src/talloc.c')
-rw-r--r--src/talloc.c1804
1 files changed, 0 insertions, 1804 deletions
diff --git a/src/talloc.c b/src/talloc.c
deleted file mode 100644
index d3a0690f..00000000
--- a/src/talloc.c
+++ /dev/null
@@ -1,1804 +0,0 @@
-/*
- Samba Unix SMB/CIFS implementation.
-
- Samba trivial allocation library - new interface
-
- NOTE: Please read talloc_guide.txt for full documentation
-
- Copyright (C) Andrew Tridgell 2004
- Copyright (C) Stefan Metzmacher 2006
-
- ** NOTE! The following LGPL license applies to the talloc
- ** library. This does NOT imply that all of Samba is released
- ** under the LGPL
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 3 of the License, or (at your option) any later version.
-
- This library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with this library; if not, see <http://www.gnu.org/licenses/>.
-*/
-
-/*
- inspired by http://swapped.cc/halloc/
-*/
-
-#ifdef _SAMBA_BUILD_
-#include "version.h"
-#if (SAMBA_VERSION_MAJOR<4)
-#include "includes.h"
-/* This is to circumvent SAMBA3's paranoid malloc checker. Here in this file
- * we trust ourselves... */
-#ifdef malloc
-#undef malloc
-#endif
-#ifdef realloc
-#undef realloc
-#endif
-#define _TALLOC_SAMBA3
-#endif /* (SAMBA_VERSION_MAJOR<4) */
-#endif /* _SAMBA_BUILD_ */
-
-#ifndef _TALLOC_SAMBA3
-//#include "replace.h"
-#include <unistd.h>
-#include <stdio.h>
-#include <stdbool.h>
-#define __USE_GNU
-#include <string.h>
-#undef __USE_GNU
-#include <osmocom/core/talloc.h>
-#define MIN(x,y) ((x) < (y) ? (x) : (y))
-#endif /* not _TALLOC_SAMBA3 */
-
-/* use this to force every realloc to change the pointer, to stress test
- code that might not cope */
-#define ALWAYS_REALLOC 0
-
-
-#define MAX_TALLOC_SIZE 0x10000000
-#define TALLOC_MAGIC 0xe814ec70
-#define TALLOC_FLAG_FREE 0x01
-#define TALLOC_FLAG_LOOP 0x02
-#define TALLOC_FLAG_POOL 0x04 /* This is a talloc pool */
-#define TALLOC_FLAG_POOLMEM 0x08 /* This is allocated in a pool */
-#define TALLOC_MAGIC_REFERENCE ((const char *)1)
-
-/* by default we abort when given a bad pointer (such as when talloc_free() is called
- on a pointer that came from malloc() */
-#ifndef TALLOC_ABORT
-#define TALLOC_ABORT(reason) abort()
-#endif
-
-#ifndef discard_const_p
-#if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
-# define discard_const_p(type, ptr) ((type *)((intptr_t)(ptr)))
-#else
-# define discard_const_p(type, ptr) ((type *)(ptr))
-#endif
-#endif
-
-/* these macros gain us a few percent of speed on gcc */
-#if (__GNUC__ >= 3)
-/* the strange !! is to ensure that __builtin_expect() takes either 0 or 1
- as its first argument */
-#ifndef likely
-#define likely(x) __builtin_expect(!!(x), 1)
-#endif
-#ifndef unlikely
-#define unlikely(x) __builtin_expect(!!(x), 0)
-#endif
-#else
-#ifndef likely
-#define likely(x) (x)
-#endif
-#ifndef unlikely
-#define unlikely(x) (x)
-#endif
-#endif
-
-#ifdef __APPLE__
-/* taken from http://insanecoding.blogspot.com/2007/03/methods-for-safe-string-handling.html */
-size_t strnlen(const char *s, size_t n)
-{
- const char *p = (const char *)memchr(s, 0, n);
- return(p ? p-s : n);
-}
-#endif
-
-/* this null_context is only used if talloc_enable_leak_report() or
- talloc_enable_leak_report_full() is called, otherwise it remains
- NULL
-*/
-static void *null_context;
-static void *autofree_context;
-
-struct talloc_reference_handle {
- struct talloc_reference_handle *next, *prev;
- void *ptr;
-};
-
-typedef int (*talloc_destructor_t)(void *);
-
-struct talloc_chunk {
- struct talloc_chunk *next, *prev;
- struct talloc_chunk *parent, *child;
- struct talloc_reference_handle *refs;
- talloc_destructor_t destructor;
- const char *name;
- size_t size;
- unsigned flags;
-
- /*
- * "pool" has dual use:
- *
- * For the talloc pool itself (i.e. TALLOC_FLAG_POOL is set), "pool"
- * marks the end of the currently allocated area.
- *
- * For members of the pool (i.e. TALLOC_FLAG_POOLMEM is set), "pool"
- * is a pointer to the struct talloc_chunk of the pool that it was
- * allocated from. This way children can quickly find the pool to chew
- * from.
- */
- void *pool;
-};
-
-/* 16 byte alignment seems to keep everyone happy */
-#define TC_HDR_SIZE ((sizeof(struct talloc_chunk)+15)&~15)
-#define TC_PTR_FROM_CHUNK(tc) ((void *)(TC_HDR_SIZE + (char*)tc))
-
-static void (*talloc_abort_fn)(const char *reason);
-
-void talloc_set_abort_fn(void (*abort_fn)(const char *reason))
-{
- talloc_abort_fn = abort_fn;
-}
-
-static void talloc_abort(const char *reason)
-{
- if (!talloc_abort_fn) {
- TALLOC_ABORT(reason);
- }
-
- talloc_abort_fn(reason);
-}
-
-static void talloc_abort_double_free(void)
-{
- talloc_abort("Bad talloc magic value - double free");
-}
-
-static void talloc_abort_unknown_value(void)
-{
- talloc_abort("Bad talloc magic value - unknown value");
-}
-
-/* panic if we get a bad magic value */
-static inline struct talloc_chunk *talloc_chunk_from_ptr(const void *ptr)
-{
- const char *pp = (const char *)ptr;
- struct talloc_chunk *tc = discard_const_p(struct talloc_chunk, pp - TC_HDR_SIZE);
- if (unlikely((tc->flags & (TALLOC_FLAG_FREE | ~0xF)) != TALLOC_MAGIC)) {
- if (tc->flags & TALLOC_FLAG_FREE) {
- talloc_abort_double_free();
- } else {
- talloc_abort_unknown_value();
- }
- }
- return tc;
-}
-
-/* hook into the front of the list */
-#define _TLIST_ADD(list, p) \
-do { \
- if (!(list)) { \
- (list) = (p); \
- (p)->next = (p)->prev = NULL; \
- } else { \
- (list)->prev = (p); \
- (p)->next = (list); \
- (p)->prev = NULL; \
- (list) = (p); \
- }\
-} while (0)
-
-/* remove an element from a list - element doesn't have to be in list. */
-#define _TLIST_REMOVE(list, p) \
-do { \
- if ((p) == (list)) { \
- (list) = (p)->next; \
- if (list) (list)->prev = NULL; \
- } else { \
- if ((p)->prev) (p)->prev->next = (p)->next; \
- if ((p)->next) (p)->next->prev = (p)->prev; \
- } \
- if ((p) && ((p) != (list))) (p)->next = (p)->prev = NULL; \
-} while (0)
-
-
-/*
- return the parent chunk of a pointer
-*/
-static inline struct talloc_chunk *talloc_parent_chunk(const void *ptr)
-{
- struct talloc_chunk *tc;
-
- if (unlikely(ptr == NULL)) {
- return NULL;
- }
-
- tc = talloc_chunk_from_ptr(ptr);
- while (tc->prev) tc=tc->prev;
-
- return tc->parent;
-}
-
-void *talloc_parent(const void *ptr)
-{
- struct talloc_chunk *tc = talloc_parent_chunk(ptr);
- return tc? TC_PTR_FROM_CHUNK(tc) : NULL;
-}
-
-/*
- find parents name
-*/
-const char *talloc_parent_name(const void *ptr)
-{
- struct talloc_chunk *tc = talloc_parent_chunk(ptr);
- return tc? tc->name : NULL;
-}
-
-/*
- A pool carries an in-pool object count count in the first 16 bytes.
- bytes. This is done to support talloc_steal() to a parent outside of the
- pool. The count includes the pool itself, so a talloc_free() on a pool will
- only destroy the pool if the count has dropped to zero. A talloc_free() of a
- pool member will reduce the count, and eventually also call free(3) on the
- pool memory.
-
- The object count is not put into "struct talloc_chunk" because it is only
- relevant for talloc pools and the alignment to 16 bytes would increase the
- memory footprint of each talloc chunk by those 16 bytes.
-*/
-
-#define TALLOC_POOL_HDR_SIZE 16
-
-static unsigned int *talloc_pool_objectcount(struct talloc_chunk *tc)
-{
- return (unsigned int *)((char *)tc + sizeof(struct talloc_chunk));
-}
-
-/*
- Allocate from a pool
-*/
-
-static struct talloc_chunk *talloc_alloc_pool(struct talloc_chunk *parent,
- size_t size)
-{
- struct talloc_chunk *pool_ctx = NULL;
- size_t space_left;
- struct talloc_chunk *result;
- size_t chunk_size;
-
- if (parent == NULL) {
- return NULL;
- }
-
- if (parent->flags & TALLOC_FLAG_POOL) {
- pool_ctx = parent;
- }
- else if (parent->flags & TALLOC_FLAG_POOLMEM) {
- pool_ctx = (struct talloc_chunk *)parent->pool;
- }
-
- if (pool_ctx == NULL) {
- return NULL;
- }
-
- space_left = ((char *)pool_ctx + TC_HDR_SIZE + pool_ctx->size)
- - ((char *)pool_ctx->pool);
-
- /*
- * Align size to 16 bytes
- */
- chunk_size = ((size + 15) & ~15);
-
- if (space_left < chunk_size) {
- return NULL;
- }
-
- result = (struct talloc_chunk *)pool_ctx->pool;
-
-#if defined(DEVELOPER) && defined(VALGRIND_MAKE_MEM_UNDEFINED)
- VALGRIND_MAKE_MEM_UNDEFINED(result, size);
-#endif
-
- pool_ctx->pool = (void *)((char *)result + chunk_size);
-
- result->flags = TALLOC_MAGIC | TALLOC_FLAG_POOLMEM;
- result->pool = pool_ctx;
-
- *talloc_pool_objectcount(pool_ctx) += 1;
-
- return result;
-}
-
-/*
- Allocate a bit of memory as a child of an existing pointer
-*/
-static inline void *__talloc(const void *context, size_t size)
-{
- struct talloc_chunk *tc = NULL;
-
- if (unlikely(context == NULL)) {
- context = null_context;
- }
-
- if (unlikely(size >= MAX_TALLOC_SIZE)) {
- return NULL;
- }
-
- if (context != NULL) {
- tc = talloc_alloc_pool(talloc_chunk_from_ptr(context),
- TC_HDR_SIZE+size);
- }
-
- if (tc == NULL) {
- tc = (struct talloc_chunk *)malloc(TC_HDR_SIZE+size);
- if (unlikely(tc == NULL)) return NULL;
- tc->flags = TALLOC_MAGIC;
- tc->pool = NULL;
- }
-
- tc->size = size;
- tc->destructor = NULL;
- tc->child = NULL;
- tc->name = NULL;
- tc->refs = NULL;
-
- if (likely(context)) {
- struct talloc_chunk *parent = talloc_chunk_from_ptr(context);
-
- if (parent->child) {
- parent->child->parent = NULL;
- tc->next = parent->child;
- tc->next->prev = tc;
- } else {
- tc->next = NULL;
- }
- tc->parent = parent;
- tc->prev = NULL;
- parent->child = tc;
- } else {
- tc->next = tc->prev = tc->parent = NULL;
- }
-
- return TC_PTR_FROM_CHUNK(tc);
-}
-
-/*
- * Create a talloc pool
- */
-
-void *talloc_pool(const void *context, size_t size)
-{
- void *result = __talloc(context, size + TALLOC_POOL_HDR_SIZE);
- struct talloc_chunk *tc;
-
- if (unlikely(result == NULL)) {
- return NULL;
- }
-
- tc = talloc_chunk_from_ptr(result);
-
- tc->flags |= TALLOC_FLAG_POOL;
- tc->pool = (char *)result + TALLOC_POOL_HDR_SIZE;
-
- *talloc_pool_objectcount(tc) = 1;
-
-#if defined(DEVELOPER) && defined(VALGRIND_MAKE_MEM_NOACCESS)
- VALGRIND_MAKE_MEM_NOACCESS(tc->pool, size);
-#endif
-
- return result;
-}
-
-/*
- setup a destructor to be called on free of a pointer
- the destructor should return 0 on success, or -1 on failure.
- if the destructor fails then the free is failed, and the memory can
- be continued to be used
-*/
-void _talloc_set_destructor(const void *ptr, int (*destructor)(void *))
-{
- struct talloc_chunk *tc = talloc_chunk_from_ptr(ptr);
- tc->destructor = destructor;
-}
-
-/*
- increase the reference count on a piece of memory.
-*/
-int talloc_increase_ref_count(const void *ptr)
-{
- if (unlikely(!talloc_reference(null_context, ptr))) {
- return -1;
- }
- return 0;
-}
-
-/*
- helper for talloc_reference()
-
- this is referenced by a function pointer and should not be inline
-*/
-static int talloc_reference_destructor(struct talloc_reference_handle *handle)
-{
- struct talloc_chunk *ptr_tc = talloc_chunk_from_ptr(handle->ptr);
- _TLIST_REMOVE(ptr_tc->refs, handle);
- return 0;
-}
-
-/*
- more efficient way to add a name to a pointer - the name must point to a
- true string constant
-*/
-static inline void _talloc_set_name_const(const void *ptr, const char *name)
-{
- struct talloc_chunk *tc = talloc_chunk_from_ptr(ptr);
- tc->name = name;
-}
-
-/*
- internal talloc_named_const()
-*/
-static inline void *_talloc_named_const(const void *context, size_t size, const char *name)
-{
- void *ptr;
-
- ptr = __talloc(context, size);
- if (unlikely(ptr == NULL)) {
- return NULL;
- }
-
- _talloc_set_name_const(ptr, name);
-
- return ptr;
-}
-
-/*
- make a secondary reference to a pointer, hanging off the given context.
- the pointer remains valid until both the original caller and this given
- context are freed.
-
- the major use for this is when two different structures need to reference the
- same underlying data, and you want to be able to free the two instances separately,
- and in either order
-*/
-void *_talloc_reference(const void *context, const void *ptr)
-{
- struct talloc_chunk *tc;
- struct talloc_reference_handle *handle;
- if (unlikely(ptr == NULL)) return NULL;
-
- tc = talloc_chunk_from_ptr(ptr);
- handle = (struct talloc_reference_handle *)_talloc_named_const(context,
- sizeof(struct talloc_reference_handle),
- TALLOC_MAGIC_REFERENCE);
- if (unlikely(handle == NULL)) return NULL;
-
- /* note that we hang the destructor off the handle, not the
- main context as that allows the caller to still setup their
- own destructor on the context if they want to */
- talloc_set_destructor(handle, talloc_reference_destructor);
- handle->ptr = discard_const_p(void, ptr);
- _TLIST_ADD(tc->refs, handle);
- return handle->ptr;
-}
-
-
-/*
- internal talloc_free call
-*/
-static inline int _talloc_free(void *ptr)
-{
- struct talloc_chunk *tc;
-
- if (unlikely(ptr == NULL)) {
- return -1;
- }
-
- tc = talloc_chunk_from_ptr(ptr);
-
- if (unlikely(tc->refs)) {
- int is_child;
- /* check this is a reference from a child or grantchild
- * back to it's parent or grantparent
- *
- * in that case we need to remove the reference and
- * call another instance of talloc_free() on the current
- * pointer.
- */
- is_child = talloc_is_parent(tc->refs, ptr);
- _talloc_free(tc->refs);
- if (is_child) {
- return _talloc_free(ptr);
- }
- return -1;
- }
-
- if (unlikely(tc->flags & TALLOC_FLAG_LOOP)) {
- /* we have a free loop - stop looping */
- return 0;
- }
-
- if (unlikely(tc->destructor)) {
- talloc_destructor_t d = tc->destructor;
- if (d == (talloc_destructor_t)-1) {
- return -1;
- }
- tc->destructor = (talloc_destructor_t)-1;
- if (d(ptr) == -1) {
- tc->destructor = d;
- return -1;
- }
- tc->destructor = NULL;
- }
-
- if (tc->parent) {
- _TLIST_REMOVE(tc->parent->child, tc);
- if (tc->parent->child) {
- tc->parent->child->parent = tc->parent;
- }
- } else {
- if (tc->prev) tc->prev->next = tc->next;
- if (tc->next) tc->next->prev = tc->prev;
- }
-
- 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;
- if (unlikely(tc->child->refs)) {
- struct talloc_chunk *p = talloc_parent_chunk(tc->child->refs);
- if (p) new_parent = TC_PTR_FROM_CHUNK(p);
- }
- if (unlikely(_talloc_free(child) == -1)) {
- if (new_parent == null_context) {
- struct talloc_chunk *p = talloc_parent_chunk(ptr);
- if (p) new_parent = TC_PTR_FROM_CHUNK(p);
- }
- talloc_steal(new_parent, child);
- }
- }
-
- tc->flags |= TALLOC_FLAG_FREE;
-
- if (tc->flags & (TALLOC_FLAG_POOL|TALLOC_FLAG_POOLMEM)) {
- struct talloc_chunk *pool;
- unsigned int *pool_object_count;
-
- pool = (tc->flags & TALLOC_FLAG_POOL)
- ? tc : (struct talloc_chunk *)tc->pool;
-
- pool_object_count = talloc_pool_objectcount(pool);
-
- if (*pool_object_count == 0) {
- talloc_abort("Pool object count zero!");
- }
-
- *pool_object_count -= 1;
-
- if (*pool_object_count == 0) {
- free(pool);
- }
- }
- else {
- free(tc);
- }
- return 0;
-}
-
-/*
- move a lump of memory from one talloc context to another return the
- 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)
-{
- struct talloc_chunk *tc, *new_tc;
-
- if (unlikely(!ptr)) {
- return NULL;
- }
-
- if (unlikely(new_ctx == NULL)) {
- new_ctx = null_context;
- }
-
- tc = talloc_chunk_from_ptr(ptr);
-
- if (unlikely(new_ctx == NULL)) {
- if (tc->parent) {
- _TLIST_REMOVE(tc->parent->child, tc);
- if (tc->parent->child) {
- tc->parent->child->parent = tc->parent;
- }
- } else {
- if (tc->prev) tc->prev->next = tc->next;
- if (tc->next) tc->next->prev = tc->prev;
- }
-
- tc->parent = tc->next = tc->prev = NULL;
- return discard_const_p(void, ptr);
- }
-
- new_tc = talloc_chunk_from_ptr(new_ctx);
-
- if (unlikely(tc == new_tc || tc->parent == new_tc)) {
- return discard_const_p(void, ptr);
- }
-
- if (tc->parent) {
- _TLIST_REMOVE(tc->parent->child, tc);
- if (tc->parent->child) {
- tc->parent->child->parent = tc->parent;
- }
- } else {
- if (tc->prev) tc->prev->next = tc->next;
- if (tc->next) tc->next->prev = tc->prev;
- }
-
- tc->parent = new_tc;
- if (new_tc->child) new_tc->child->parent = NULL;
- _TLIST_ADD(new_tc->child, tc);
-
- return discard_const_p(void, ptr);
-}
-
-
-
-/*
- remove a secondary reference to a pointer. This undo's what
- talloc_reference() has done. The context and pointer arguments
- must match those given to a talloc_reference()
-*/
-static inline int talloc_unreference(const void *context, const void *ptr)
-{
- struct talloc_chunk *tc = talloc_chunk_from_ptr(ptr);
- struct talloc_reference_handle *h;
-
- if (unlikely(context == NULL)) {
- context = null_context;
- }
-
- for (h=tc->refs;h;h=h->next) {
- struct talloc_chunk *p = talloc_parent_chunk(h);
- if (p == NULL) {
- if (context == NULL) break;
- } else if (TC_PTR_FROM_CHUNK(p) == context) {
- break;
- }
- }
- if (h == NULL) {
- return -1;
- }
-
- return _talloc_free(h);
-}
-
-/*
- remove a specific parent context from a pointer. This is a more
- controlled varient of talloc_free()
-*/
-int talloc_unlink(const void *context, void *ptr)
-{
- struct talloc_chunk *tc_p, *new_p;
- void *new_parent;
-
- if (ptr == NULL) {
- return -1;
- }
-
- if (context == NULL) {
- context = null_context;
- }
-
- if (talloc_unreference(context, ptr) == 0) {
- return 0;
- }
-
- if (context == NULL) {
- if (talloc_parent_chunk(ptr) != NULL) {
- return -1;
- }
- } else {
- if (talloc_chunk_from_ptr(context) != talloc_parent_chunk(ptr)) {
- return -1;
- }
- }
-
- tc_p = talloc_chunk_from_ptr(ptr);
-
- if (tc_p->refs == NULL) {
- return _talloc_free(ptr);
- }
-
- new_p = talloc_parent_chunk(tc_p->refs);
- if (new_p) {
- new_parent = TC_PTR_FROM_CHUNK(new_p);
- } else {
- new_parent = NULL;
- }
-
- if (talloc_unreference(new_parent, ptr) != 0) {
- return -1;
- }
-
- talloc_steal(new_parent, ptr);
-
- return 0;
-}
-
-/*
- add a name to an existing pointer - va_list version
-*/
-static inline const char *talloc_set_name_v(const void *ptr, const char *fmt, va_list ap) PRINTF_ATTRIBUTE(2,0);
-
-static inline const char *talloc_set_name_v(const void *ptr, const char *fmt, va_list ap)
-{
- struct talloc_chunk *tc = talloc_chunk_from_ptr(ptr);
- tc->name = talloc_vasprintf(ptr, fmt, ap);
- if (likely(tc->name)) {
- _talloc_set_name_const(tc->name, ".name");
- }
- return tc->name;
-}
-
-/*
- add a name to an existing pointer
-*/
-const char *talloc_set_name(const void *ptr, const char *fmt, ...)
-{
- const char *name;
- va_list ap;
- va_start(ap, fmt);
- name = talloc_set_name_v(ptr, fmt, ap);
- va_end(ap);
- return name;
-}
-
-
-/*
- create a named talloc pointer. Any talloc pointer can be named, and
- talloc_named() operates just like talloc() except that it allows you
- to name the pointer.
-*/
-void *talloc_named(const void *context, size_t size, const char *fmt, ...)
-{
- va_list ap;
- void *ptr;
- const char *name;
-
- ptr = __talloc(context, size);
- if (unlikely(ptr == NULL)) return NULL;
-
- va_start(ap, fmt);
- name = talloc_set_name_v(ptr, fmt, ap);
- va_end(ap);
-
- if (unlikely(name == NULL)) {
- _talloc_free(ptr);
- return NULL;
- }
-
- return ptr;
-}
-
-/*
- return the name of a talloc ptr, or "UNNAMED"
-*/
-const char *talloc_get_name(const void *ptr)
-{
- struct talloc_chunk *tc = talloc_chunk_from_ptr(ptr);
- if (unlikely(tc->name == TALLOC_MAGIC_REFERENCE)) {
- return ".reference";
- }
- if (likely(tc->name)) {
- return tc->name;
- }
- return "UNNAMED";
-}
-
-
-/*
- check if a pointer has the given name. If it does, return the pointer,
- otherwise return NULL
-*/
-void *talloc_check_name(const void *ptr, const char *name)
-{
- const char *pname;
- if (unlikely(ptr == NULL)) return NULL;
- pname = talloc_get_name(ptr);
- if (likely(pname == name || strcmp(pname, name) == 0)) {
- return discard_const_p(void, ptr);
- }
- return NULL;
-}
-
-static void talloc_abort_type_missmatch(const char *location,
- const char *name,
- const char *expected)
-{
- const char *reason;
-
- reason = talloc_asprintf(NULL,
- "%s: Type mismatch: name[%s] expected[%s]",
- location,
- name?name:"NULL",
- expected);
- if (!reason) {
- reason = "Type mismatch";
- }
-
- talloc_abort(reason);
-}
-
-void *_talloc_get_type_abort(const void *ptr, const char *name, const char *location)
-{
- const char *pname;
-
- if (unlikely(ptr == NULL)) {
- talloc_abort_type_missmatch(location, NULL, name);
- return NULL;
- }
-
- pname = talloc_get_name(ptr);
- if (likely(pname == name || strcmp(pname, name) == 0)) {
- return discard_const_p(void, ptr);
- }
-
- talloc_abort_type_missmatch(location, pname, name);
- return NULL;
-}
-
-/*
- this is for compatibility with older versions of talloc
-*/
-void *talloc_init(const char *fmt, ...)
-{
- va_list ap;
- void *ptr;
- const char *name;
-
- /*
- * samba3 expects talloc_report_depth_cb(NULL, ...)
- * reports all talloc'ed memory, so we need to enable
- * null_tracking
- */
- talloc_enable_null_tracking();
-
- ptr = __talloc(NULL, 0);
- if (unlikely(ptr == NULL)) return NULL;
-
- va_start(ap, fmt);
- name = talloc_set_name_v(ptr, fmt, ap);
- va_end(ap);
-
- if (unlikely(name == NULL)) {
- _talloc_free(ptr);
- return NULL;
- }
-
- 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 (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
- 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;
- if (unlikely(tc->child->refs)) {
- struct talloc_chunk *p = talloc_parent_chunk(tc->child->refs);
- if (p) new_parent = TC_PTR_FROM_CHUNK(p);
- }
- if (unlikely(_talloc_free(child) == -1)) {
- if (new_parent == null_context) {
- struct talloc_chunk *p = talloc_parent_chunk(ptr);
- if (p) new_parent = TC_PTR_FROM_CHUNK(p);
- }
- talloc_steal(new_parent, child);
- }
- }
-
- if ((tc->flags & TALLOC_FLAG_POOL)
- && (*talloc_pool_objectcount(tc) == 1)) {
- tc->pool = ((char *)tc + TC_HDR_SIZE + TALLOC_POOL_HDR_SIZE);
-#if defined(DEVELOPER) && defined(VALGRIND_MAKE_MEM_NOACCESS)
- VALGRIND_MAKE_MEM_NOACCESS(
- tc->pool, tc->size - TALLOC_POOL_HDR_SIZE);
-#endif
- }
-}
-
-/*
- Allocate a bit of memory as a child of an existing pointer
-*/
-void *_talloc(const void *context, size_t size)
-{
- return __talloc(context, size);
-}
-
-/*
- externally callable talloc_set_name_const()
-*/
-void talloc_set_name_const(const void *ptr, const char *name)
-{
- _talloc_set_name_const(ptr, name);
-}
-
-/*
- create a named talloc pointer. Any talloc pointer can be named, and
- talloc_named() operates just like talloc() except that it allows you
- to name the pointer.
-*/
-void *talloc_named_const(const void *context, size_t size, const char *name)
-{
- return _talloc_named_const(context, size, name);
-}
-
-/*
- free a talloc pointer. This also frees all child pointers of this
- pointer recursively
-
- return 0 if the memory is actually freed, otherwise -1. The memory
- will not be freed if the ref_count is > 1 or the destructor (if
- any) returns non-zero
-*/
-int talloc_free(void *ptr)
-{
- return _talloc_free(ptr);
-}
-
-
-
-/*
- A talloc version of realloc. The context argument is only used if
- ptr is NULL
-*/
-void *_talloc_realloc(const void *context, void *ptr, size_t size, const char *name)
-{
- struct talloc_chunk *tc;
- void *new_ptr;
- bool malloced = false;
-
- /* size zero is equivalent to free() */
- if (unlikely(size == 0)) {
- _talloc_free(ptr);
- return NULL;
- }
-
- if (unlikely(size >= MAX_TALLOC_SIZE)) {
- return NULL;
- }
-
- /* realloc(NULL) is equivalent to malloc() */
- if (ptr == NULL) {
- return _talloc_named_const(context, size, name);
- }
-
- tc = talloc_chunk_from_ptr(ptr);
-
- /* don't allow realloc on referenced pointers */
- if (unlikely(tc->refs)) {
- return NULL;
- }
-
- /* don't let anybody try to realloc a talloc_pool */
- if (unlikely(tc->flags & TALLOC_FLAG_POOL)) {
- return NULL;
- }
-
- /* don't shrink if we have less than 1k to gain */
- if ((size < tc->size) && ((tc->size - size) < 1024)) {
- tc->size = size;
- return ptr;
- }
-
- /* by resetting magic we catch users of the old memory */
- tc->flags |= TALLOC_FLAG_FREE;
-
-#if ALWAYS_REALLOC
- new_ptr = malloc(size + TC_HDR_SIZE);
- if (new_ptr) {
- memcpy(new_ptr, tc, tc->size + TC_HDR_SIZE);
- free(tc);
- }
-#else
- if (tc->flags & TALLOC_FLAG_POOLMEM) {
-
- new_ptr = talloc_alloc_pool(tc, size + TC_HDR_SIZE);
- *talloc_pool_objectcount((struct talloc_chunk *)
- (tc->pool)) -= 1;
-
- if (new_ptr == NULL) {
- new_ptr = malloc(TC_HDR_SIZE+size);
- malloced = true;
- }
-
- if (new_ptr) {
- memcpy(new_ptr, tc, MIN(tc->size,size) + TC_HDR_SIZE);
- }
- }
- else {
- new_ptr = realloc(tc, size + TC_HDR_SIZE);
- }
-#endif
- if (unlikely(!new_ptr)) {
- tc->flags &= ~TALLOC_FLAG_FREE;
- return NULL;
- }
-
- tc = (struct talloc_chunk *)new_ptr;
- tc->flags &= ~TALLOC_FLAG_FREE;
- if (malloced) {
- tc->flags &= ~TALLOC_FLAG_POOLMEM;
- }
- if (tc->parent) {
- tc->parent->child = tc;
- }
- if (tc->child) {
- tc->child->parent = tc;
- }
-
- if (tc->prev) {
- tc->prev->next = tc;
- }
- if (tc->next) {
- tc->next->prev = tc;
- }
-
- tc->size = size;
- _talloc_set_name_const(TC_PTR_FROM_CHUNK(tc), name);
-
- return TC_PTR_FROM_CHUNK(tc);
-}
-
-/*
- a wrapper around talloc_steal() for situations where you are moving a pointer
- between two structures, and want the old pointer to be set to NULL
-*/
-void *_talloc_move(const void *new_ctx, const void *_pptr)
-{
- const void **pptr = discard_const_p(const void *,_pptr);
- void *ret = _talloc_steal(new_ctx, *pptr);
- (*pptr) = NULL;
- return ret;
-}
-
-/*
- return the total size of a talloc pool (subtree)
-*/
-size_t talloc_total_size(const void *ptr)
-{
- size_t total = 0;
- struct talloc_chunk *c, *tc;
-
- if (ptr == NULL) {
- ptr = null_context;
- }
- if (ptr == NULL) {
- return 0;
- }
-
- tc = talloc_chunk_from_ptr(ptr);
-
- if (tc->flags & TALLOC_FLAG_LOOP) {
- return 0;
- }
-
- tc->flags |= TALLOC_FLAG_LOOP;
-
- total = tc->size;
- for (c=tc->child;c;c=c->next) {
- total += talloc_total_size(TC_PTR_FROM_CHUNK(c));
- }
-
- tc->flags &= ~TALLOC_FLAG_LOOP;
-
- return total;
-}
-
-/*
- return the total number of blocks in a talloc pool (subtree)
-*/
-size_t talloc_total_blocks(const void *ptr)
-{
- size_t total = 0;
- struct talloc_chunk *c, *tc = talloc_chunk_from_ptr(ptr);
-
- if (tc->flags & TALLOC_FLAG_LOOP) {
- return 0;
- }
-
- tc->flags |= TALLOC_FLAG_LOOP;
-
- total++;
- for (c=tc->child;c;c=c->next) {
- total += talloc_total_blocks(TC_PTR_FROM_CHUNK(c));
- }
-
- tc->flags &= ~TALLOC_FLAG_LOOP;
-
- return total;
-}
-
-/*
- return the number of external references to a pointer
-*/
-size_t talloc_reference_count(const void *ptr)
-{
- struct talloc_chunk *tc = talloc_chunk_from_ptr(ptr);
- struct talloc_reference_handle *h;
- size_t ret = 0;
-
- for (h=tc->refs;h;h=h->next) {
- ret++;
- }
- return ret;
-}
-
-/*
- report on memory usage by all children of a pointer, giving a full tree view
-*/
-void talloc_report_depth_cb(const void *ptr, int depth, int max_depth,
- void (*callback)(const void *ptr,
- int depth, int max_depth,
- int is_ref,
- void *private_data),
- void *private_data)
-{
- struct talloc_chunk *c, *tc;
-
- if (ptr == NULL) {
- ptr = null_context;
- }
- if (ptr == NULL) return;
-
- tc = talloc_chunk_from_ptr(ptr);
-
- if (tc->flags & TALLOC_FLAG_LOOP) {
- return;
- }
-
- callback(ptr, depth, max_depth, 0, private_data);
-
- if (max_depth >= 0 && depth >= max_depth) {
- return;
- }
-
- tc->flags |= TALLOC_FLAG_LOOP;
- for (c=tc->child;c;c=c->next) {
- if (c->name == TALLOC_MAGIC_REFERENCE) {
- struct talloc_reference_handle *h = (struct talloc_reference_handle *)TC_PTR_FROM_CHUNK(c);
- callback(h->ptr, depth + 1, max_depth, 1, private_data);
- } else {
- talloc_report_depth_cb(TC_PTR_FROM_CHUNK(c), depth + 1, max_depth, callback, private_data);
- }
- }
- tc->flags &= ~TALLOC_FLAG_LOOP;
-}
-
-static void talloc_report_depth_FILE_helper(const void *ptr, int depth, int max_depth, int is_ref, void *_f)
-{
- const char *name = talloc_get_name(ptr);
- FILE *f = (FILE *)_f;
-
- if (is_ref) {
- fprintf(f, "%*sreference to: %s\n", depth*4, "", name);
- return;
- }
-
- if (depth == 0) {
- fprintf(f,"%stalloc report on '%s' (total %6lu bytes in %3lu blocks)\n",
- (max_depth < 0 ? "full " :""), name,
- (unsigned long)talloc_total_size(ptr),
- (unsigned long)talloc_total_blocks(ptr));
- return;
- }
-
- fprintf(f, "%*s%-30s contains %6lu bytes in %3lu blocks (ref %d) %p\n",
- depth*4, "",
- name,
- (unsigned long)talloc_total_size(ptr),
- (unsigned long)talloc_total_blocks(ptr),
- (int)talloc_reference_count(ptr), ptr);
-
-#if 0
- fprintf(f, "content: ");
- if (talloc_total_size(ptr)) {
- int tot = talloc_total_size(ptr);
- int i;
-
- for (i = 0; i < tot; i++) {
- if ((((char *)ptr)[i] > 31) && (((char *)ptr)[i] < 126)) {
- fprintf(f, "%c", ((char *)ptr)[i]);
- } else {
- fprintf(f, "~%02x", ((char *)ptr)[i]);
- }
- }
- }
- fprintf(f, "\n");
-#endif
-}
-
-/*
- report on memory usage by all children of a pointer, giving a full tree view
-*/
-void talloc_report_depth_file(const void *ptr, int depth, int max_depth, FILE *f)
-{
- talloc_report_depth_cb(ptr, depth, max_depth, talloc_report_depth_FILE_helper, f);
- fflush(f);
-}
-
-/*
- report on memory usage by all children of a pointer, giving a full tree view
-*/
-void talloc_report_full(const void *ptr, FILE *f)
-{
- talloc_report_depth_file(ptr, 0, -1, f);
-}
-
-/*
- report on memory usage by all children of a pointer
-*/
-void talloc_report(const void *ptr, FILE *f)
-{
- talloc_report_depth_file(ptr, 0, 1, f);
-}
-
-/*
- report on any memory hanging off the null context
-*/
-static void talloc_report_null(void)
-{
- if (talloc_total_size(null_context) != 0) {
- talloc_report(null_context, stderr);
- }
-}
-
-/*
- report on any memory hanging off the null context
-*/
-static void talloc_report_null_full(void)
-{
- if (talloc_total_size(null_context) != 0) {
- talloc_report_full(null_context, stderr);
- }
-}
-
-/*
- enable tracking of the NULL context
-*/
-void talloc_enable_null_tracking(void)
-{
- if (null_context == NULL) {
- null_context = _talloc_named_const(NULL, 0, "null_context");
- }
-}
-
-/*
- disable tracking of the NULL context
-*/
-void talloc_disable_null_tracking(void)
-{
- _talloc_free(null_context);
- null_context = NULL;
-}
-
-/*
- enable leak reporting on exit
-*/
-void talloc_enable_leak_report(void)
-{
- talloc_enable_null_tracking();
- atexit(talloc_report_null);
-}
-
-/*
- enable full leak reporting on exit
-*/
-void talloc_enable_leak_report_full(void)
-{
- talloc_enable_null_tracking();
- atexit(talloc_report_null_full);
-}
-
-/*
- talloc and zero memory.
-*/
-void *_talloc_zero(const void *ctx, size_t size, const char *name)
-{
- void *p = _talloc_named_const(ctx, size, name);
-
- if (p) {
- memset(p, '\0', size);
- }
-
- return p;
-}
-
-/*
- memdup with a talloc.
-*/
-void *_talloc_memdup(const void *t, const void *p, size_t size, const char *name)
-{
- void *newp = _talloc_named_const(t, size, name);
-
- if (likely(newp)) {
- memcpy(newp, p, size);
- }
-
- return newp;
-}
-
-static inline char *__talloc_strlendup(const void *t, const char *p, size_t len)
-{
- char *ret;
-
- ret = (char *)__talloc(t, len + 1);
- if (unlikely(!ret)) return NULL;
-
- memcpy(ret, p, len);
- ret[len] = 0;
-
- _talloc_set_name_const(ret, ret);
- return ret;
-}
-
-/*
- strdup with a talloc
-*/
-char *talloc_strdup(const void *t, const char *p)
-{
- if (unlikely(!p)) return NULL;
- return __talloc_strlendup(t, p, strlen(p));
-}
-
-/*
- strndup with a talloc
-*/
-char *talloc_strndup(const void *t, const char *p, size_t n)
-{
- if (unlikely(!p)) return NULL;
- return __talloc_strlendup(t, p, strnlen(p, n));
-}
-
-static inline char *__talloc_strlendup_append(char *s, size_t slen,
- const char *a, size_t alen)
-{
- char *ret;
-
- ret = talloc_realloc(NULL, s, char, slen + alen + 1);
- if (unlikely(!ret)) return NULL;
-
- /* append the string and the trailing \0 */
- memcpy(&ret[slen], a, alen);
- ret[slen+alen] = 0;
-
- _talloc_set_name_const(ret, ret);
- return ret;
-}
-
-/*
- * Appends at the end of the string.
- */
-char *talloc_strdup_append(char *s, const char *a)
-{
- if (unlikely(!s)) {
- return talloc_strdup(NULL, a);
- }
-
- if (unlikely(!a)) {
- return s;
- }
-
- return __talloc_strlendup_append(s, strlen(s), a, strlen(a));
-}
-
-/*
- * Appends at the end of the talloc'ed buffer,
- * not the end of the string.
- */
-char *talloc_strdup_append_buffer(char *s, const char *a)
-{
- size_t slen;
-
- if (unlikely(!s)) {
- return talloc_strdup(NULL, a);
- }
-
- if (unlikely(!a)) {
- return s;
- }
-
- slen = talloc_get_size(s);
- if (likely(slen > 0)) {
- slen--;
- }
-
- return __talloc_strlendup_append(s, slen, a, strlen(a));
-}
-
-/*
- * Appends at the end of the string.
- */
-char *talloc_strndup_append(char *s, const char *a, size_t n)
-{
- if (unlikely(!s)) {
- return talloc_strdup(NULL, a);
- }
-
- if (unlikely(!a)) {
- return s;
- }
-
- return __talloc_strlendup_append(s, strlen(s), a, strnlen(a, n));
-}
-
-/*
- * Appends at the end of the talloc'ed buffer,
- * not the end of the string.
- */
-char *talloc_strndup_append_buffer(char *s, const char *a, size_t n)
-{
- size_t slen;
-
- if (unlikely(!s)) {
- return talloc_strdup(NULL, a);
- }
-
- if (unlikely(!a)) {
- return s;
- }
-
- slen = talloc_get_size(s);
- if (likely(slen > 0)) {
- slen--;
- }
-
- return __talloc_strlendup_append(s, slen, a, strnlen(a, n));
-}
-
-#ifndef HAVE_VA_COPY
-#ifdef HAVE___VA_COPY
-#define va_copy(dest, src) __va_copy(dest, src)
-#else
-#define va_copy(dest, src) (dest) = (src)
-#endif
-#endif
-
-char *talloc_vasprintf(const void *t, const char *fmt, va_list ap)
-{
- int len;
- char *ret;
- va_list ap2;
- char c;
-
- /* this call looks strange, but it makes it work on older solaris boxes */
- va_copy(ap2, ap);
- len = vsnprintf(&c, 1, fmt, ap2);
- va_end(ap2);
- if (unlikely(len < 0)) {
- return NULL;
- }
-
- ret = (char *)__talloc(t, len+1);
- if (unlikely(!ret)) return NULL;
-
- va_copy(ap2, ap);
- vsnprintf(ret, len+1, fmt, ap2);
- va_end(ap2);
-
- _talloc_set_name_const(ret, ret);
- return ret;
-}
-
-
-/*
- Perform string formatting, and return a pointer to newly allocated
- memory holding the result, inside a memory pool.
- */
-char *talloc_asprintf(const void *t, const char *fmt, ...)
-{
- va_list ap;
- char *ret;
-
- va_start(ap, fmt);
- ret = talloc_vasprintf(t, fmt, ap);
- va_end(ap);
- return ret;
-}
-
-static inline char *__talloc_vaslenprintf_append(char *s, size_t slen,
- const char *fmt, va_list ap)
- PRINTF_ATTRIBUTE(3,0);
-
-static inline char *__talloc_vaslenprintf_append(char *s, size_t slen,
- const char *fmt, va_list ap)
-{
- ssize_t alen;
- va_list ap2;
- char c;
-
- va_copy(ap2, ap);
- alen = vsnprintf(&c, 1, fmt, ap2);
- va_end(ap2);
-
- if (alen <= 0) {
- /* Either the vsnprintf failed or the format resulted in
- * no characters being formatted. In the former case, we
- * ought to return NULL, in the latter we ought to return
- * the original string. Most current callers of this
- * function expect it to never return NULL.
- */
- return s;
- }
-
- s = talloc_realloc(NULL, s, char, slen + alen + 1);
- if (!s) return NULL;
-
- va_copy(ap2, ap);
- vsnprintf(s + slen, alen + 1, fmt, ap2);
- va_end(ap2);
-
- _talloc_set_name_const(s, s);
- return s;
-}
-
-/**
- * Realloc @p s to append the formatted result of @p fmt and @p ap,
- * and return @p s, which may have moved. Good for gradually
- * accumulating output into a string buffer. Appends at the end
- * of the string.
- **/
-char *talloc_vasprintf_append(char *s, const char *fmt, va_list ap)
-{
- if (unlikely(!s)) {
- return talloc_vasprintf(NULL, fmt, ap);
- }
-
- return __talloc_vaslenprintf_append(s, strlen(s), fmt, ap);
-}
-
-/**
- * Realloc @p s to append the formatted result of @p fmt and @p ap,
- * and return @p s, which may have moved. Always appends at the
- * end of the talloc'ed buffer, not the end of the string.
- **/
-char *talloc_vasprintf_append_buffer(char *s, const char *fmt, va_list ap)
-{
- size_t slen;
-
- if (unlikely(!s)) {
- return talloc_vasprintf(NULL, fmt, ap);
- }
-
- slen = talloc_get_size(s);
- if (likely(slen > 0)) {
- slen--;
- }
-
- return __talloc_vaslenprintf_append(s, slen, fmt, ap);
-}
-
-/*
- Realloc @p s to append the formatted result of @p fmt and return @p
- s, which may have moved. Good for gradually accumulating output
- into a string buffer.
- */
-char *talloc_asprintf_append(char *s, const char *fmt, ...)
-{
- va_list ap;
-
- va_start(ap, fmt);
- s = talloc_vasprintf_append(s, fmt, ap);
- va_end(ap);
- return s;
-}
-
-/*
- Realloc @p s to append the formatted result of @p fmt and return @p
- s, which may have moved. Good for gradually accumulating output
- into a buffer.
- */
-char *talloc_asprintf_append_buffer(char *s, const char *fmt, ...)
-{
- va_list ap;
-
- va_start(ap, fmt);
- s = talloc_vasprintf_append_buffer(s, fmt, ap);
- va_end(ap);
- return s;
-}
-
-/*
- alloc an array, checking for integer overflow in the array size
-*/
-void *_talloc_array(const void *ctx, size_t el_size, unsigned count, const char *name)
-{
- if (count >= MAX_TALLOC_SIZE/el_size) {
- return NULL;
- }
- return _talloc_named_const(ctx, el_size * count, name);
-}
-
-/*
- alloc an zero array, checking for integer overflow in the array size
-*/
-void *_talloc_zero_array(const void *ctx, size_t el_size, unsigned count, const char *name)
-{
- if (count >= MAX_TALLOC_SIZE/el_size) {
- return NULL;
- }
- return _talloc_zero(ctx, el_size * count, name);
-}
-
-/*
- realloc an array, checking for integer overflow in the array size
-*/
-void *_talloc_realloc_array(const void *ctx, void *ptr, size_t el_size, unsigned count, const char *name)
-{
- if (count >= MAX_TALLOC_SIZE/el_size) {
- return NULL;
- }
- return _talloc_realloc(ctx, ptr, el_size * count, name);
-}
-
-/*
- a function version of talloc_realloc(), so it can be passed as a function pointer
- to libraries that want a realloc function (a realloc function encapsulates
- all the basic capabilities of an allocation library, which is why this is useful)
-*/
-void *talloc_realloc_fn(const void *context, void *ptr, size_t size)
-{
- return _talloc_realloc(context, ptr, size, NULL);
-}
-
-
-static int talloc_autofree_destructor(void *ptr)
-{
- autofree_context = NULL;
- return 0;
-}
-
-static void talloc_autofree(void)
-{
- _talloc_free(autofree_context);
-}
-
-/*
- return a context which will be auto-freed on exit
- this is useful for reducing the noise in leak reports
-*/
-void *talloc_autofree_context(void)
-{
- if (autofree_context == NULL) {
- autofree_context = _talloc_named_const(NULL, 0, "autofree_context");
- talloc_set_destructor(autofree_context, talloc_autofree_destructor);
- atexit(talloc_autofree);
- }
- return autofree_context;
-}
-
-size_t talloc_get_size(const void *context)
-{
- struct talloc_chunk *tc;
-
- if (context == NULL)
- return 0;
-
- tc = talloc_chunk_from_ptr(context);
-
- return tc->size;
-}
-
-/*
- find a parent of this context that has the given name, if any
-*/
-void *talloc_find_parent_byname(const void *context, const char *name)
-{
- struct talloc_chunk *tc;
-
- if (context == NULL) {
- return NULL;
- }
-
- tc = talloc_chunk_from_ptr(context);
- while (tc) {
- if (tc->name && strcmp(tc->name, name) == 0) {
- return TC_PTR_FROM_CHUNK(tc);
- }
- while (tc && tc->prev) tc = tc->prev;
- if (tc) {
- tc = tc->parent;
- }
- }
- return NULL;
-}
-
-/*
- show the parentage of a context
-*/
-void talloc_show_parents(const void *context, FILE *file)
-{
- struct talloc_chunk *tc;
-
- if (context == NULL) {
- fprintf(file, "talloc no parents for NULL\n");
- return;
- }
-
- tc = talloc_chunk_from_ptr(context);
- fprintf(file, "talloc parents of '%s'\n", talloc_get_name(context));
- while (tc) {
- fprintf(file, "\t'%s'\n", talloc_get_name(TC_PTR_FROM_CHUNK(tc)));
- while (tc && tc->prev) tc = tc->prev;
- if (tc) {
- tc = tc->parent;
- }
- }
- fflush(file);
-}
-
-/*
- return 1 if ptr is a parent of context
-*/
-int talloc_is_parent(const void *context, const void *ptr)
-{
- struct talloc_chunk *tc;
-
- if (context == NULL) {
- return 0;
- }
-
- tc = talloc_chunk_from_ptr(context);
- while (tc) {
- if (TC_PTR_FROM_CHUNK(tc) == ptr) return 1;
- while (tc && tc->prev) tc = tc->prev;
- if (tc) {
- tc = tc->parent;
- }
- }
- return 0;
-}