astobj2.c File Reference

#include "asterisk.h"
#include "asterisk/_private.h"
#include "asterisk/astobj2.h"
#include "asterisk/linkedlists.h"
#include "asterisk/utils.h"
#include "asterisk/cli.h"
#include <execinfo.h>

Include dependency graph for astobj2.c:

Go to the source code of this file.

Data Structures
struct	__priv_data
struct	ao2_container
struct	ao2_lock_priv
struct	ao2_rwlock_priv
struct	astobj2
struct	astobj2_lock
struct	astobj2_rwlock
struct	bucket
struct	bucket_entry
Defines
#define	AO2_MAGIC   0xa570b123
#define	EXTERNAL_OBJ(_p)   ((_p) == NULL ? NULL : (_p)->user_data)
	convert from a pointer _p to an astobj2 object
#define	INTERNAL_OBJ_MUTEX(user_data)   ((struct astobj2_lock *) (((char *) (user_data)) - sizeof(struct astobj2_lock)))
#define	INTERNAL_OBJ_RWLOCK(user_data)   ((struct astobj2_rwlock *) (((char *) (user_data)) - sizeof(struct astobj2_rwlock)))
#define	N1   20
#define	REF_FILE   "/tmp/refs"
Enumerations
enum	ao2_callback_type { DEFAULT, WITH_DATA }
Functions
void *	__ao2_alloc (size_t data_size, ao2_destructor_fn destructor_fn, unsigned int options)
void *	__ao2_alloc_debug (size_t data_size, ao2_destructor_fn destructor_fn, unsigned int options, const char *tag, const char *file, int line, const char *func, int ref_debug)
void *	__ao2_callback (struct ao2_container *c, enum search_flags flags, ao2_callback_fn *cb_fn, void *arg)
void *	__ao2_callback_data (struct ao2_container *c, enum search_flags flags, ao2_callback_data_fn *cb_fn, void *arg, void *data)
void *	__ao2_callback_data_debug (struct ao2_container *c, enum search_flags flags, ao2_callback_data_fn *cb_fn, void *arg, void *data, const char *tag, const char *file, int line, const char *func)
void *	__ao2_callback_debug (struct ao2_container *c, enum search_flags flags, ao2_callback_fn *cb_fn, void *arg, const char *tag, const char *file, int line, const char *func)
void	__ao2_cleanup (void *obj)
void	__ao2_cleanup_debug (void *obj, const char *file, int line, const char *function)
struct ao2_container *	__ao2_container_alloc (unsigned int options, unsigned int n_buckets, ao2_hash_fn *hash_fn, ao2_callback_fn *cmp_fn)
struct ao2_container *	__ao2_container_alloc_debug (unsigned int options, unsigned int n_buckets, ao2_hash_fn *hash_fn, ao2_callback_fn *cmp_fn, const char *tag, const char *file, int line, const char *func, int ref_debug)
struct ao2_container *	__ao2_container_clone (struct ao2_container *orig, enum search_flags flags)
	Create a clone/copy of the given container.
struct ao2_container *	__ao2_container_clone_debug (struct ao2_container *orig, enum search_flags flags, const char *tag, const char *file, int line, const char *func, int ref_debug)
void *	__ao2_find (struct ao2_container *c, const void *arg, enum search_flags flags)
void *	__ao2_find_debug (struct ao2_container *c, const void *arg, enum search_flags flags, const char *tag, const char *file, int line, const char *func)
void *	__ao2_global_obj_ref (struct ao2_global_obj *holder, const char *tag, const char *file, int line, const char *func, const char *name)
void	__ao2_global_obj_release (struct ao2_global_obj *holder, const char *tag, const char *file, int line, const char *func, const char *name)
void *	__ao2_global_obj_replace (struct ao2_global_obj *holder, void *obj, const char *tag, const char *file, int line, const char *func, const char *name)
int	__ao2_global_obj_replace_unref (struct ao2_global_obj *holder, void *obj, const char *tag, const char *file, int line, const char *func, const char *name)
void *	__ao2_iterator_next (struct ao2_iterator *iter)
void *	__ao2_iterator_next_debug (struct ao2_iterator *iter, const char *tag, const char *file, int line, const char *func)
void *	__ao2_link (struct ao2_container *c, void *obj_new, int flags)
void *	__ao2_link_debug (struct ao2_container *c, void *obj_new, int flags, const char *tag, const char *file, int line, const char *func)
int	__ao2_lock (void *user_data, enum ao2_lock_req lock_how, const char *file, const char *func, int line, const char *var)
	Lock an object.
int	__ao2_ref (void *user_data, int delta)
int	__ao2_ref_debug (void *user_data, int delta, const char *tag, const char *file, int line, const char *func)
int	__ao2_trylock (void *user_data, enum ao2_lock_req lock_how, const char *file, const char *func, int line, const char *var)
	Try locking-- (don't block if fail)
void *	__ao2_unlink (struct ao2_container *c, void *user_data, int flags)
void *	__ao2_unlink_debug (struct ao2_container *c, void *user_data, int flags, const char *tag, const char *file, int line, const char *func)
int	__ao2_unlock (void *user_data, const char *file, const char *func, int line, const char *var)
	Unlock an object.
static enum ao2_lock_req	adjust_lock (void *user_data, enum ao2_lock_req lock_how, int keep_stronger)
void	ao2_bt (void)
int	ao2_container_count (struct ao2_container *c)
	Returns the number of elements in a container.
int	ao2_container_dup (struct ao2_container *dest, struct ao2_container *src, enum search_flags flags)
	Copy all object references in the src container into the dest container.
void	ao2_iterator_cleanup (struct ao2_iterator *iter)
void	ao2_iterator_destroy (struct ao2_iterator *iter)
	Destroy a container iterator.
struct ao2_iterator	ao2_iterator_init (struct ao2_container *c, int flags)
	Create an iterator for a container.
int	ao2_match_by_addr (void *user_data, void *arg, int flags)
	another convenience function is a callback that matches on address
void *	ao2_object_get_lockaddr (void *user_data)
	Return the mutex lock address of an object.
int	astobj2_init (void)
static int	cb_true (void *user_data, void *arg, int flags)
	special callback that matches all
static int	cb_true_data (void *user_data, void *arg, void *data, int flags)
	similar to cb_true, but is an ao2_callback_data_fn instead
static int	cd_cb (void *obj, void *arg, int flag)
static int	cd_cb_debug (void *obj, void *arg, int flag)
static void	container_destruct (void *c)
static void	container_destruct_debug (void *c)
static int	dup_obj_cb (void *obj, void *arg, int flags)
static int	hash_zero (const void *user_obj, const int flags)
	always zero hash function
static void *	internal_ao2_alloc (size_t data_size, ao2_destructor_fn destructor_fn, unsigned int options, const char *file, int line, const char *func)
static void *	internal_ao2_callback (struct ao2_container *c, enum search_flags flags, void *cb_fn, void *arg, void *data, enum ao2_callback_type type, const char *tag, const char *file, int line, const char *func)
static struct ao2_container *	internal_ao2_container_alloc (struct ao2_container *c, unsigned int n_buckets, ao2_hash_fn *hash_fn, ao2_callback_fn *cmp_fn)
static void *	internal_ao2_iterator_next (struct ao2_iterator *iter, const char *tag, const char *file, int line, const char *func)
static struct bucket_entry *	internal_ao2_link (struct ao2_container *c, void *user_data, int flags, const char *tag, const char *file, int line, const char *func)
static int	internal_ao2_ref (void *user_data, int delta, const char *file, int line, const char *func)
static struct astobj2 *	INTERNAL_OBJ (void *user_data)
	convert from a pointer _p to a user-defined object

---

Define Documentation

#define AO2_MAGIC   0xa570b123

Definition at line 61 of file astobj2.c.

Referenced by internal_ao2_alloc(), and INTERNAL_OBJ().

#define EXTERNAL_OBJ

(

_p

)

((_p) == NULL ? NULL : (_p)->user_data)

convert from a pointer _p to an astobj2 object

Returns:

the pointer to the user-defined portion.

Definition at line 177 of file astobj2.c.

Referenced by internal_ao2_alloc(), internal_ao2_callback(), and internal_ao2_iterator_next().

#define INTERNAL_OBJ_MUTEX

(

user_data

)

((struct astobj2_lock *) (((char *) (user_data)) - sizeof(struct astobj2_lock)))

Definition at line 130 of file astobj2.c.

Referenced by __ao2_lock(), __ao2_trylock(), __ao2_unlock(), ao2_object_get_lockaddr(), and internal_ao2_ref().

#define INTERNAL_OBJ_RWLOCK

(

user_data

)

((struct astobj2_rwlock *) (((char *) (user_data)) - sizeof(struct astobj2_rwlock)))

Definition at line 133 of file astobj2.c.

Referenced by __ao2_lock(), __ao2_trylock(), __ao2_unlock(), adjust_lock(), and internal_ao2_ref().

#define N1   20

Referenced by ao2_bt().

#define REF_FILE   "/tmp/refs"

Definition at line 34 of file astobj2.c.

Referenced by __ao2_alloc_debug(), and __ao2_ref_debug().

---

Enumeration Type Documentation

enum ao2_callback_type

Enumerator:

DEFAULT
WITH_DATA

Definition at line 167 of file astobj2.c.

                       {
   DEFAULT,
   WITH_DATA,
};

---

Function Documentation

void* __ao2_alloc	(	size_t	data_size,
		ao2_destructor_fn	destructor_fn,
		unsigned int	options
	)

Definition at line 640 of file astobj2.c.

References internal_ao2_alloc().

Referenced by __ao2_container_alloc().

{
   return internal_ao2_alloc(data_size, destructor_fn, options, __FILE__, __LINE__, __FUNCTION__);
}

void* __ao2_alloc_debug	(	size_t	data_size,
		ao2_destructor_fn	destructor_fn,
		unsigned int	options,
		const char *	tag,
		const char *	file,
		int	line,
		const char *	func,
		int	ref_debug
	)

Definition at line 620 of file astobj2.c.

References internal_ao2_alloc(), and REF_FILE.

Referenced by __ao2_container_alloc_debug(), __ast_channel_internal_alloc(), and _moh_class_malloc().

{
   /* allocation */
   void *obj;
   FILE *refo;

   if ((obj = internal_ao2_alloc(data_size, destructor_fn, options, file, line, func)) == NULL) {
      return NULL;
   }

   if (ref_debug && (refo = fopen(REF_FILE, "a"))) {
      fprintf(refo, "%p =1   %s:%d:%s (%s)\n", obj, file, line, func, tag);
      fclose(refo);
   }

   /* return a pointer to the user data */
   return obj;
}

void* __ao2_callback	(	struct ao2_container *	c,
		enum search_flags	flags,
		ao2_callback_fn *	cb_fn,
		void *	arg
	)

Definition at line 1204 of file astobj2.c.

References DEFAULT, and internal_ao2_callback().

Referenced by __ao2_find(), __ao2_unlink(), ao2_container_dup(), and container_destruct().

{
   return internal_ao2_callback(c,flags, cb_fn, arg, NULL, DEFAULT, NULL, NULL, 0, NULL);
}

void* __ao2_callback_data	(	struct ao2_container *	c,
		enum search_flags	flags,
		ao2_callback_data_fn *	cb_fn,
		void *	arg,
		void *	data
	)

Definition at line 1217 of file astobj2.c.

References internal_ao2_callback(), and WITH_DATA.

{
   return internal_ao2_callback(c, flags, cb_fn, arg, data, WITH_DATA, NULL, NULL, 0, NULL);
}

void* __ao2_callback_data_debug	(	struct ao2_container *	c,
		enum search_flags	flags,
		ao2_callback_data_fn *	cb_fn,
		void *	arg,
		void *	data,
		const char *	tag,
		const char *	file,
		int	line,
		const char *	func
	)

Definition at line 1210 of file astobj2.c.

References internal_ao2_callback(), and WITH_DATA.

{
   return internal_ao2_callback(c, flags, cb_fn, arg, data, WITH_DATA, tag, file, line, func);
}

void* __ao2_callback_debug	(	struct ao2_container *	c,
		enum search_flags	flags,
		ao2_callback_fn *	cb_fn,
		void *	arg,
		const char *	tag,
		const char *	file,
		int	line,
		const char *	func
	)

Definition at line 1197 of file astobj2.c.

References DEFAULT, and internal_ao2_callback().

Referenced by __ao2_find_debug(), __ao2_unlink_debug(), and container_destruct_debug().

{
   return internal_ao2_callback(c,flags, cb_fn, arg, NULL, DEFAULT, tag, file, line, func);
}

void __ao2_cleanup

(

void *

obj

)

gcc __attribute__(cleanup()) functions

Note:

they must be able to handle NULL parameters because most of the allocation/find functions can fail and we don't want to try to tear down a NULL

Definition at line 1557 of file astobj2.c.

References ao2_ref.

{
   if (obj) {
      ao2_ref(obj, -1);
   }
}

void __ao2_cleanup_debug	(	void *	obj,
		const char *	file,
		int	line,
		const char *	function
	)

Definition at line 1550 of file astobj2.c.

References __ao2_ref_debug().

{
   if (obj) {
      __ao2_ref_debug(obj, -1, "ao2_cleanup", file, line, function);
   }
}

struct ao2_container* __ao2_container_alloc	(	unsigned int	options,
		unsigned int	n_buckets,
		ao2_hash_fn *	hash_fn,
		ao2_callback_fn *	cmp_fn
	)		[read]

Definition at line 851 of file astobj2.c.

References __ao2_alloc(), container_destruct(), and internal_ao2_container_alloc().

Referenced by __ao2_container_clone(), and internal_ao2_callback().

{
   /* XXX maybe consistency check on arguments ? */
   /* compute the container size */
   const unsigned int num_buckets = hash_fn ? n_buckets : 1;
   size_t container_size = sizeof(struct ao2_container) + num_buckets * sizeof(struct bucket);
   struct ao2_container *c = __ao2_alloc(container_size, container_destruct, options);

   return internal_ao2_container_alloc(c, num_buckets, hash_fn, cmp_fn);
}

struct ao2_container* __ao2_container_alloc_debug	(	unsigned int	options,
		unsigned int	n_buckets,
		ao2_hash_fn *	hash_fn,
		ao2_callback_fn *	cmp_fn,
		const char *	tag,
		const char *	file,
		int	line,
		const char *	func,
		int	ref_debug
	)		[read]

Definition at line 838 of file astobj2.c.

References __ao2_alloc_debug(), container_destruct(), container_destruct_debug(), and internal_ao2_container_alloc().

Referenced by __ao2_container_clone_debug().

{
   /* XXX maybe consistency check on arguments ? */
   /* compute the container size */
   unsigned int num_buckets = hash_fn ? n_buckets : 1;
   size_t container_size = sizeof(struct ao2_container) + num_buckets * sizeof(struct bucket);
   struct ao2_container *c = __ao2_alloc_debug(container_size, ref_debug ? container_destruct_debug : container_destruct, options, tag, file, line, func, ref_debug);

   return internal_ao2_container_alloc(c, num_buckets, hash_fn, cmp_fn);
}

struct ao2_container* __ao2_container_clone	(	struct ao2_container *	orig,
		enum search_flags	flags
	)		[read]

Create a clone/copy of the given container.

Since:

11.0

Parameters:

orig	Container to copy all object references from.
flags	OBJ_NOLOCK if a lock is already held on the container.

Note:

This can potentially be expensive because a malloc is needed for every object in the orig container.

Return values:

Clone	container on success.
NULL	on error.

Definition at line 1477 of file astobj2.c.

References __ao2_container_alloc(), __ao2_ref(), ao2_container_dup(), ao2_unlock, ao2_wrlock, ao2_container::cmp_fn, ao2_container::hash_fn, INTERNAL_OBJ(), ao2_container::n_buckets, OBJ_NOLOCK, __priv_data::options, and astobj2::priv_data.

{
   struct ao2_container *clone;
   struct astobj2 *orig_obj;
   unsigned int options;
   int failed;

   orig_obj = INTERNAL_OBJ(orig);
   if (!orig_obj) {
      return NULL;
   }
   options = orig_obj->priv_data.options;

   /* Create the clone container with the same properties as the original. */
   clone = __ao2_container_alloc(options, orig->n_buckets, orig->hash_fn, orig->cmp_fn);
   if (!clone) {
      return NULL;
   }

   if (flags & OBJ_NOLOCK) {
      ao2_wrlock(clone);
   }
   failed = ao2_container_dup(clone, orig, flags);
   if (flags & OBJ_NOLOCK) {
      ao2_unlock(clone);
   }
   if (failed) {
      /* Object copy into the clone container failed. */
      __ao2_ref(clone, -1);
      clone = NULL;
   }
   return clone;
}

struct ao2_container* __ao2_container_clone_debug	(	struct ao2_container *	orig,
		enum search_flags	flags,
		const char *	tag,
		const char *	file,
		int	line,
		const char *	func,
		int	ref_debug
	)		[read]

Definition at line 1511 of file astobj2.c.

References __ao2_container_alloc_debug(), __ao2_ref(), __ao2_ref_debug(), ao2_container_dup(), ao2_unlock, ao2_wrlock, ao2_container::cmp_fn, ao2_container::hash_fn, INTERNAL_OBJ(), ao2_container::n_buckets, OBJ_NOLOCK, __priv_data::options, and astobj2::priv_data.

{
   struct ao2_container *clone;
   struct astobj2 *orig_obj;
   unsigned int options;
   int failed;

   orig_obj = INTERNAL_OBJ(orig);
   if (!orig_obj) {
      return NULL;
   }
   options = orig_obj->priv_data.options;

   /* Create the clone container with the same properties as the original. */
   clone = __ao2_container_alloc_debug(options, orig->n_buckets, orig->hash_fn,
      orig->cmp_fn, tag, file, line, func, ref_debug);
   if (!clone) {
      return NULL;
   }

   if (flags & OBJ_NOLOCK) {
      ao2_wrlock(clone);
   }
   failed = ao2_container_dup(clone, orig, flags);
   if (flags & OBJ_NOLOCK) {
      ao2_unlock(clone);
   }
   if (failed) {
      /* Object copy into the clone container failed. */
      if (ref_debug) {
         __ao2_ref_debug(clone, -1, tag, file, line, func);
      } else {
         __ao2_ref(clone, -1);
      }
      clone = NULL;
   }
   return clone;
}

void* __ao2_find	(	struct ao2_container *	c,
		const void *	arg,
		enum search_flags	flags
	)

Definition at line 1234 of file astobj2.c.

References __ao2_callback(), and ao2_container::cmp_fn.

Referenced by _get_mohbyname().

{
   void *arged = (void *) arg;/* Done to avoid compiler const warning */

   return __ao2_callback(c, flags, c->cmp_fn, arged);
}

void* __ao2_find_debug	(	struct ao2_container *	c,
		const void *	arg,
		enum search_flags	flags,
		const char *	tag,
		const char *	file,
		int	line,
		const char *	func
	)

the find function just invokes the default callback with some reasonable flags.

Definition at line 1226 of file astobj2.c.

References __ao2_callback_debug(), and ao2_container::cmp_fn.

Referenced by _get_mohbyname().

{
   void *arged = (void *) arg;/* Done to avoid compiler const warning */

   return __ao2_callback_debug(c, flags, c->cmp_fn, arged, tag, file, line, func);
}

void* __ao2_global_obj_ref	(	struct ao2_global_obj *	holder,
		const char *	tag,
		const char *	file,
		int	line,
		const char *	func,
		const char *	name
	)

Definition at line 716 of file astobj2.c.

References __ao2_ref(), __ao2_ref_debug(), __ast_rwlock_rdlock(), __ast_rwlock_unlock(), ast_log(), ao2_global_obj::lock, LOG_ERROR, and ao2_global_obj::obj.

{
   void *obj;

   if (!holder) {
      /* For sanity */
      ast_log(LOG_ERROR, "Must be called with a global object!\n");
      return NULL;
   }

   if (__ast_rwlock_rdlock(file, line, func, &holder->lock, name)) {
      /* Could not get the read lock. */
      return NULL;
   }

   obj = holder->obj;
   if (obj) {
      if (tag) {
         __ao2_ref_debug(obj, +1, tag, file, line, func);
      } else {
         __ao2_ref(obj, +1);
      }
   }

   __ast_rwlock_unlock(file, line, func, &holder->lock, name);

   return obj;
}

void __ao2_global_obj_release	(	struct ao2_global_obj *	holder,
		const char *	tag,
		const char *	file,
		int	line,
		const char *	func,
		const char *	name
	)

Definition at line 646 of file astobj2.c.

References __ao2_ref(), __ao2_ref_debug(), __ast_rwlock_unlock(), __ast_rwlock_wrlock(), ast_log(), ao2_global_obj::lock, LOG_ERROR, and ao2_global_obj::obj.

{
   if (!holder) {
      /* For sanity */
      ast_log(LOG_ERROR, "Must be called with a global object!\n");
      return;
   }
   if (__ast_rwlock_wrlock(file, line, func, &holder->lock, name)) {
      /* Could not get the write lock. */
      return;
   }

   /* Release the held ao2 object. */
   if (holder->obj) {
      if (tag) {
         __ao2_ref_debug(holder->obj, -1, tag, file, line, func);
      } else {
         __ao2_ref(holder->obj, -1);
      }
      holder->obj = NULL;
   }

   __ast_rwlock_unlock(file, line, func, &holder->lock, name);
}

void* __ao2_global_obj_replace	(	struct ao2_global_obj *	holder,
		void *	obj,
		const char *	tag,
		const char *	file,
		int	line,
		const char *	func,
		const char *	name
	)

Definition at line 671 of file astobj2.c.

References __ao2_ref(), __ao2_ref_debug(), __ast_rwlock_unlock(), __ast_rwlock_wrlock(), ast_log(), ao2_global_obj::lock, LOG_ERROR, and ao2_global_obj::obj.

Referenced by __ao2_global_obj_replace_unref().

{
   void *obj_old;

   if (!holder) {
      /* For sanity */
      ast_log(LOG_ERROR, "Must be called with a global object!\n");
      return NULL;
   }
   if (__ast_rwlock_wrlock(file, line, func, &holder->lock, name)) {
      /* Could not get the write lock. */
      return NULL;
   }

   if (obj) {
      if (tag) {
         __ao2_ref_debug(obj, +1, tag, file, line, func);
      } else {
         __ao2_ref(obj, +1);
      }
   }
   obj_old = holder->obj;
   holder->obj = obj;

   __ast_rwlock_unlock(file, line, func, &holder->lock, name);

   return obj_old;
}

int __ao2_global_obj_replace_unref	(	struct ao2_global_obj *	holder,
		void *	obj,
		const char *	tag,
		const char *	file,
		int	line,
		const char *	func,
		const char *	name
	)

Definition at line 700 of file astobj2.c.

References __ao2_global_obj_replace(), __ao2_ref(), and __ao2_ref_debug().

{
   void *obj_old;

   obj_old = __ao2_global_obj_replace(holder, obj, tag, file, line, func, name);
   if (obj_old) {
      if (tag) {
         __ao2_ref_debug(obj_old, -1, tag, file, line, func);
      } else {
         __ao2_ref(obj_old, -1);
      }
      return 1;
   }
   return 0;
}

void* __ao2_iterator_next

(

struct ao2_iterator *

iter

)

Definition at line 1371 of file astobj2.c.

References internal_ao2_iterator_next().

{
   return internal_ao2_iterator_next(iter, NULL, __FILE__, __LINE__, __PRETTY_FUNCTION__);
}

void* __ao2_iterator_next_debug	(	struct ao2_iterator *	iter,
		const char *	tag,
		const char *	file,
		int	line,
		const char *	func
	)

Definition at line 1366 of file astobj2.c.

References internal_ao2_iterator_next().

{
   return internal_ao2_iterator_next(iter, tag, file, line, func);
}

void* __ao2_link	(	struct ao2_container *	c,
		void *	obj_new,
		int	flags
	)

Definition at line 930 of file astobj2.c.

References internal_ao2_link().

Referenced by dup_obj_cb(), and internal_ao2_callback().

{
   return internal_ao2_link(c, obj_new, flags, NULL, __FILE__, __LINE__, __PRETTY_FUNCTION__);
}

void* __ao2_link_debug	(	struct ao2_container *	c,
		void *	obj_new,
		int	flags,
		const char *	tag,
		const char *	file,
		int	line,
		const char *	func
	)

Definition at line 925 of file astobj2.c.

References internal_ao2_link().

Referenced by internal_ao2_callback().

{
   return internal_ao2_link(c, obj_new, flags, tag, file, line, func);
}

int __ao2_lock	(	void *	a,
		enum ao2_lock_req	lock_how,
		const char *	file,
		const char *	func,
		int	line,
		const char *	var
	)

Lock an object.

Parameters:

a	A pointer to the object we want to lock.

Returns:

0 on success, other values on error.

Definition at line 179 of file astobj2.c.

References __ast_pthread_mutex_lock(), __ast_rwlock_rdlock(), __ast_rwlock_wrlock(), __LOG_ERROR, AO2_ALLOC_OPT_LOCK_MASK, AO2_ALLOC_OPT_LOCK_MUTEX, AO2_ALLOC_OPT_LOCK_NOLOCK, AO2_ALLOC_OPT_LOCK_RWLOCK, AO2_LOCK_REQ_MUTEX, AO2_LOCK_REQ_RDLOCK, AO2_LOCK_REQ_WRLOCK, ast_atomic_fetchadd_int(), ast_log(), INTERNAL_OBJ(), INTERNAL_OBJ_MUTEX, INTERNAL_OBJ_RWLOCK, ao2_lock_priv::lock, ao2_rwlock_priv::lock, astobj2_lock::mutex, ao2_rwlock_priv::num_lockers, __priv_data::options, astobj2::priv_data, and astobj2_rwlock::rwlock.

Referenced by _ast_bridge_lock().

{
   struct astobj2 *obj = INTERNAL_OBJ(user_data);
   struct astobj2_lock *obj_mutex;
   struct astobj2_rwlock *obj_rwlock;
   int res = 0;

   if (obj == NULL) {
      return -1;
   }

   switch (obj->priv_data.options & AO2_ALLOC_OPT_LOCK_MASK) {
   case AO2_ALLOC_OPT_LOCK_MUTEX:
      obj_mutex = INTERNAL_OBJ_MUTEX(user_data);
      res = __ast_pthread_mutex_lock(file, line, func, var, &obj_mutex->mutex.lock);
#ifdef AO2_DEBUG
      if (!res) {
         ast_atomic_fetchadd_int(&ao2.total_locked, 1);
      }
#endif
      break;
   case AO2_ALLOC_OPT_LOCK_RWLOCK:
      obj_rwlock = INTERNAL_OBJ_RWLOCK(user_data);
      switch (lock_how) {
      case AO2_LOCK_REQ_MUTEX:
      case AO2_LOCK_REQ_WRLOCK:
         res = __ast_rwlock_wrlock(file, line, func, &obj_rwlock->rwlock.lock, var);
         if (!res) {
            ast_atomic_fetchadd_int(&obj_rwlock->rwlock.num_lockers, -1);
#ifdef AO2_DEBUG
            ast_atomic_fetchadd_int(&ao2.total_locked, 1);
#endif
         }
         break;
      case AO2_LOCK_REQ_RDLOCK:
         res = __ast_rwlock_rdlock(file, line, func, &obj_rwlock->rwlock.lock, var);
         if (!res) {
            ast_atomic_fetchadd_int(&obj_rwlock->rwlock.num_lockers, +1);
#ifdef AO2_DEBUG
            ast_atomic_fetchadd_int(&ao2.total_locked, 1);
#endif
         }
         break;
      }
      break;
   case AO2_ALLOC_OPT_LOCK_NOLOCK:
      /* The ao2 object has no lock. */
      break;
   default:
      ast_log(__LOG_ERROR, file, line, func, "Invalid lock option on ao2 object %p\n",
         user_data);
      return -1;
   }

   return res;
}

int __ao2_ref	(	void *	user_data,
		int	delta
	)

Definition at line 540 of file astobj2.c.

References internal_ao2_ref().

Referenced by __ao2_container_clone(), __ao2_container_clone_debug(), __ao2_global_obj_ref(), __ao2_global_obj_release(), __ao2_global_obj_replace(), __ao2_global_obj_replace_unref(), ao2_container_dup(), cd_cb(), internal_ao2_callback(), internal_ao2_iterator_next(), and internal_ao2_link().

{
   return internal_ao2_ref(user_data, delta, __FILE__, __LINE__, __FUNCTION__);
}

int __ao2_ref_debug	(	void *	user_data,
		int	delta,
		const char *	tag,
		const char *	file,
		int	line,
		const char *	func
	)

Definition at line 515 of file astobj2.c.

References __priv_data::destructor_fn, internal_ao2_ref(), INTERNAL_OBJ(), astobj2::priv_data, __priv_data::ref_counter, and REF_FILE.

Referenced by __ao2_cleanup_debug(), __ao2_container_clone_debug(), __ao2_global_obj_ref(), __ao2_global_obj_release(), __ao2_global_obj_replace(), __ao2_global_obj_replace_unref(), cd_cb_debug(), dialog_ref_debug(), dialog_unref_debug(), internal_ao2_callback(), internal_ao2_iterator_next(), and internal_ao2_link().

{
   struct astobj2 *obj = INTERNAL_OBJ(user_data);

   if (obj == NULL)
      return -1;

   if (delta != 0) {
      FILE *refo = fopen(REF_FILE, "a");
      if (refo) {
         fprintf(refo, "%p %s%d   %s:%d:%s (%s) [@%d]\n", user_data, (delta < 0 ? "" : "+"),
            delta, file, line, func, tag, obj->priv_data.ref_counter);
         fclose(refo);
      }
   }
   if (obj->priv_data.ref_counter + delta == 0 && obj->priv_data.destructor_fn != NULL) { /* this isn't protected with lock; just for o/p */
      FILE *refo = fopen(REF_FILE, "a");
      if (refo) {
         fprintf(refo, "%p **call destructor** %s:%d:%s (%s)\n", user_data, file, line, func, tag);
         fclose(refo);
      }
   }
   return internal_ao2_ref(user_data, delta, file, line, func);
}

int __ao2_trylock	(	void *	a,
		enum ao2_lock_req	lock_how,
		const char *	file,
		const char *	func,
		int	line,
		const char *	var
	)

Try locking-- (don't block if fail)

Parameters:

a	A pointer to the object we want to lock.

Returns:

0 on success, other values on error.

Definition at line 285 of file astobj2.c.

References __ast_pthread_mutex_trylock(), __ast_rwlock_tryrdlock(), __ast_rwlock_trywrlock(), __LOG_ERROR, AO2_ALLOC_OPT_LOCK_MASK, AO2_ALLOC_OPT_LOCK_MUTEX, AO2_ALLOC_OPT_LOCK_NOLOCK, AO2_ALLOC_OPT_LOCK_RWLOCK, AO2_LOCK_REQ_MUTEX, AO2_LOCK_REQ_RDLOCK, AO2_LOCK_REQ_WRLOCK, ast_atomic_fetchadd_int(), ast_log(), INTERNAL_OBJ(), INTERNAL_OBJ_MUTEX, INTERNAL_OBJ_RWLOCK, ao2_lock_priv::lock, ao2_rwlock_priv::lock, astobj2_lock::mutex, ao2_rwlock_priv::num_lockers, __priv_data::options, astobj2::priv_data, and astobj2_rwlock::rwlock.

{
   struct astobj2 *obj = INTERNAL_OBJ(user_data);
   struct astobj2_lock *obj_mutex;
   struct astobj2_rwlock *obj_rwlock;
   int res = 0;

   if (obj == NULL) {
      return -1;
   }

   switch (obj->priv_data.options & AO2_ALLOC_OPT_LOCK_MASK) {
   case AO2_ALLOC_OPT_LOCK_MUTEX:
      obj_mutex = INTERNAL_OBJ_MUTEX(user_data);
      res = __ast_pthread_mutex_trylock(file, line, func, var, &obj_mutex->mutex.lock);
#ifdef AO2_DEBUG
      if (!res) {
         ast_atomic_fetchadd_int(&ao2.total_locked, 1);
      }
#endif
      break;
   case AO2_ALLOC_OPT_LOCK_RWLOCK:
      obj_rwlock = INTERNAL_OBJ_RWLOCK(user_data);
      switch (lock_how) {
      case AO2_LOCK_REQ_MUTEX:
      case AO2_LOCK_REQ_WRLOCK:
         res = __ast_rwlock_trywrlock(file, line, func, &obj_rwlock->rwlock.lock, var);
         if (!res) {
            ast_atomic_fetchadd_int(&obj_rwlock->rwlock.num_lockers, -1);
#ifdef AO2_DEBUG
            ast_atomic_fetchadd_int(&ao2.total_locked, 1);
#endif
         }
         break;
      case AO2_LOCK_REQ_RDLOCK:
         res = __ast_rwlock_tryrdlock(file, line, func, &obj_rwlock->rwlock.lock, var);
         if (!res) {
            ast_atomic_fetchadd_int(&obj_rwlock->rwlock.num_lockers, +1);
#ifdef AO2_DEBUG
            ast_atomic_fetchadd_int(&ao2.total_locked, 1);
#endif
         }
         break;
      }
      break;
   case AO2_ALLOC_OPT_LOCK_NOLOCK:
      /* The ao2 object has no lock. */
      return 0;
   default:
      ast_log(__LOG_ERROR, file, line, func, "Invalid lock option on ao2 object %p\n",
         user_data);
      return -1;
   }


   return res;
}

void* __ao2_unlink	(	struct ao2_container *	c,
		void *	user_data,
		int	flags
	)

Definition at line 960 of file astobj2.c.

References __ao2_callback(), ao2_match_by_addr(), INTERNAL_OBJ(), OBJ_NODATA, OBJ_POINTER, and OBJ_UNLINK.

{
   if (INTERNAL_OBJ(user_data) == NULL) { /* safety check on the argument */
      return NULL;
   }

   flags |= (OBJ_UNLINK | OBJ_POINTER | OBJ_NODATA);
   __ao2_callback(c, flags, ao2_match_by_addr, user_data);

   return NULL;
}

void* __ao2_unlink_debug	(	struct ao2_container *	c,
		void *	user_data,
		int	flags,
		const char *	tag,
		const char *	file,
		int	line,
		const char *	func
	)

Definition at line 947 of file astobj2.c.

References __ao2_callback_debug(), ao2_match_by_addr(), INTERNAL_OBJ(), OBJ_NODATA, OBJ_POINTER, and OBJ_UNLINK.

{
   if (INTERNAL_OBJ(user_data) == NULL) { /* safety check on the argument */
      return NULL;
   }

   flags |= (OBJ_UNLINK | OBJ_POINTER | OBJ_NODATA);
   __ao2_callback_debug(c, flags, ao2_match_by_addr, user_data, tag, file, line, func);

   return NULL;
}

int __ao2_unlock	(	void *	a,
		const char *	file,
		const char *	func,
		int	line,
		const char *	var
	)

Unlock an object.

Parameters:

a	A pointer to the object we want unlock.

Returns:

0 on success, other values on error.

Definition at line 236 of file astobj2.c.

References __ast_pthread_mutex_unlock(), __ast_rwlock_unlock(), __LOG_ERROR, AO2_ALLOC_OPT_LOCK_MASK, AO2_ALLOC_OPT_LOCK_MUTEX, AO2_ALLOC_OPT_LOCK_NOLOCK, AO2_ALLOC_OPT_LOCK_RWLOCK, ast_atomic_fetchadd_int(), ast_log(), INTERNAL_OBJ(), INTERNAL_OBJ_MUTEX, INTERNAL_OBJ_RWLOCK, ao2_lock_priv::lock, ao2_rwlock_priv::lock, astobj2_lock::mutex, ao2_rwlock_priv::num_lockers, __priv_data::options, astobj2::priv_data, and astobj2_rwlock::rwlock.

Referenced by _ast_bridge_unlock().

{
   struct astobj2 *obj = INTERNAL_OBJ(user_data);
   struct astobj2_lock *obj_mutex;
   struct astobj2_rwlock *obj_rwlock;
   int res = 0;
   int current_value;

   if (obj == NULL) {
      return -1;
   }

   switch (obj->priv_data.options & AO2_ALLOC_OPT_LOCK_MASK) {
   case AO2_ALLOC_OPT_LOCK_MUTEX:
      obj_mutex = INTERNAL_OBJ_MUTEX(user_data);
      res = __ast_pthread_mutex_unlock(file, line, func, var, &obj_mutex->mutex.lock);
#ifdef AO2_DEBUG
      if (!res) {
         ast_atomic_fetchadd_int(&ao2.total_locked, -1);
      }
#endif
      break;
   case AO2_ALLOC_OPT_LOCK_RWLOCK:
      obj_rwlock = INTERNAL_OBJ_RWLOCK(user_data);

      current_value = ast_atomic_fetchadd_int(&obj_rwlock->rwlock.num_lockers, -1) - 1;
      if (current_value < 0) {
         /* It was a WRLOCK that we are unlocking.  Fix the count. */
         ast_atomic_fetchadd_int(&obj_rwlock->rwlock.num_lockers, -current_value);
      }
      res = __ast_rwlock_unlock(file, line, func, &obj_rwlock->rwlock.lock, var);
#ifdef AO2_DEBUG
      if (!res) {
         ast_atomic_fetchadd_int(&ao2.total_locked, -1);
      }
#endif
      break;
   case AO2_ALLOC_OPT_LOCK_NOLOCK:
      /* The ao2 object has no lock. */
      break;
   default:
      ast_log(__LOG_ERROR, file, line, func, "Invalid lock option on ao2 object %p\n",
         user_data);
      res = -1;
      break;
   }
   return res;
}

static enum ao2_lock_req adjust_lock	(	void *	user_data,
		enum ao2_lock_req	lock_how,
		int	keep_stronger
	)		[static]

Definition at line 360 of file astobj2.c.

References AO2_ALLOC_OPT_LOCK_MASK, AO2_ALLOC_OPT_LOCK_MUTEX, AO2_ALLOC_OPT_LOCK_NOLOCK, AO2_ALLOC_OPT_LOCK_RWLOCK, AO2_LOCK_REQ_MUTEX, AO2_LOCK_REQ_RDLOCK, AO2_LOCK_REQ_WRLOCK, ao2_rdlock, ao2_unlock, ao2_wrlock, ast_log(), INTERNAL_OBJ(), INTERNAL_OBJ_RWLOCK, LOG_ERROR, ao2_rwlock_priv::num_lockers, __priv_data::options, astobj2::priv_data, and astobj2_rwlock::rwlock.

Referenced by internal_ao2_callback(), internal_ao2_iterator_next(), and internal_ao2_link().

{
   struct astobj2 *obj = INTERNAL_OBJ(user_data);
   struct astobj2_rwlock *obj_rwlock;
   enum ao2_lock_req orig_lock;

   switch (obj->priv_data.options & AO2_ALLOC_OPT_LOCK_MASK) {
   case AO2_ALLOC_OPT_LOCK_RWLOCK:
      obj_rwlock = INTERNAL_OBJ_RWLOCK(user_data);
      if (obj_rwlock->rwlock.num_lockers < 0) {
         orig_lock = AO2_LOCK_REQ_WRLOCK;
      } else {
         orig_lock = AO2_LOCK_REQ_RDLOCK;
      }
      switch (lock_how) {
      case AO2_LOCK_REQ_MUTEX:
         lock_how = AO2_LOCK_REQ_WRLOCK;
         /* Fall through */
      case AO2_LOCK_REQ_WRLOCK:
         if (lock_how != orig_lock) {
            /* Switch from read lock to write lock. */
            ao2_unlock(user_data);
            ao2_wrlock(user_data);
         }
         break;
      case AO2_LOCK_REQ_RDLOCK:
         if (!keep_stronger && lock_how != orig_lock) {
            /* Switch from write lock to read lock. */
            ao2_unlock(user_data);
            ao2_rdlock(user_data);
         }
         break;
      }
      break;
   default:
      ast_log(LOG_ERROR, "Invalid lock option on ao2 object %p\n", user_data);
      /* Fall through */
   case AO2_ALLOC_OPT_LOCK_NOLOCK:
   case AO2_ALLOC_OPT_LOCK_MUTEX:
      orig_lock = AO2_LOCK_REQ_MUTEX;
      break;
   }

   return orig_lock;
}

void ao2_bt

(

void

)

Definition at line 113 of file astobj2.c.

References ast_bt_get_symbols(), ast_std_free(), ast_verbose(), and N1.

{
   int c, i;
#define N1  20
   void *addresses[N1];
   char **strings;

   c = backtrace(addresses, N1);
   strings = ast_bt_get_symbols(addresses,c);
   ast_verbose("backtrace returned: %d\n", c);
   for(i = 0; i < c; i++) {
      ast_verbose("%d: %p %s\n", i, addresses[i], strings[i]);
   }
   ast_std_free(strings);
}

int ao2_container_count

(

struct ao2_container *

c

)

Returns the number of elements in a container.

return the number of elements in the container

Definition at line 866 of file astobj2.c.

References ao2_container::elements.

Referenced by __ast_data_register(), __ast_manager_event_multichan(), __queues_show(), _sip_show_peers(), action_confbridgekick(), action_confbridgelist(), action_confbridgelistrooms(), action_confbridgesetsinglevideosrc(), action_confbridgestartrecord(), action_confbridgestoprecord(), action_lock_unlock_helper(), action_mute_unmute_helper(), ast_active_channels(), ast_data_search_match(), ast_format_cap_get_type(), ast_format_cap_identical(), ast_format_cap_is_empty(), ast_format_cap_joint(), ast_get_namedgroups(), ast_merge_contexts_and_delete(), ast_namedgroups_intersect(), ast_srtp_unprotect(), ast_tone_zone_count(), build_format_list_array(), calc_metric(), cc_cli_output_status(), cleanup(), cli_fax_show_sessions(), cli_tps_report(), data_odbc_provider_handler(), data_provider_release(), data_provider_release_all(), do_timing(), endelm(), func_confbridge_info(), get_device_state_causing_channels(), get_unused_callno(), handle_cli_iax2_show_callno_limits(), handle_manager_show_events(), handle_show_hint(), handle_show_hints(), handle_statechange(), hints_data_provider_get(), joint_copy_helper(), list_hash_cb(), locals_show(), lock_broker(), match_filter(), meetme_data_provider_get(), member_add_to_queue(), pthread_timer_open(), queue_exec(), queue_function_mem_read(), queues_data_provider_get_helper(), sla_in_use(), try_calling(), unload_module(), and xmpp_show_clients().

{
   return c->elements;
}

int ao2_container_dup	(	struct ao2_container *	dest,
		struct ao2_container *	src,
		enum search_flags	flags
	)

Copy all object references in the src container into the dest container.

Since:

11.0

Parameters:

dest	Container to copy src object references into.
src	Container to copy all object references from.
flags	OBJ_NOLOCK if a lock is already held on both containers. Otherwise, the src container is locked first.

Precondition:

The dest container must be empty. If the duplication fails, the dest container will be returned empty.

Note:

This can potentially be expensive because a malloc is needed for every object in the src container.

Return values:

0	on success.
-1	on error.

Definition at line 1450 of file astobj2.c.

References __ao2_callback(), __ao2_ref(), ao2_rdlock, ao2_unlock, ao2_wrlock, dup_obj_cb(), OBJ_MULTIPLE, OBJ_NODATA, OBJ_NOLOCK, and OBJ_UNLINK.

Referenced by __ao2_container_clone(), and __ao2_container_clone_debug().

{
   void *obj;
   int res = 0;

   if (!(flags & OBJ_NOLOCK)) {
      ao2_rdlock(src);
      ao2_wrlock(dest);
   }
   obj = __ao2_callback(src, OBJ_NOLOCK, dup_obj_cb, dest);
   if (obj) {
      /* Failed to put this obj into the dest container. */
      __ao2_ref(obj, -1);

      /* Remove all items from the dest container. */
      __ao2_callback(dest, OBJ_NOLOCK | OBJ_UNLINK | OBJ_NODATA | OBJ_MULTIPLE, NULL,
         NULL);
      res = -1;
   }
   if (!(flags & OBJ_NOLOCK)) {
      ao2_unlock(dest);
      ao2_unlock(src);
   }

   return res;
}

void ao2_iterator_cleanup

(

struct ao2_iterator *

iter

)

Definition at line 1564 of file astobj2.c.

References ao2_iterator_destroy().

{
   if (iter) {
      ao2_iterator_destroy(iter);
   }
}

void ao2_iterator_destroy

(

struct ao2_iterator *

iter

)

Destroy a container iterator.

destroy an iterator

Definition at line 1259 of file astobj2.c.

References AO2_ITERATOR_MALLOCD, ao2_ref, ast_free, ao2_iterator::c, and ao2_iterator::flags.

Referenced by __ast_data_search_cmp_structure(), __ast_manager_event_multichan(), __data_result_print_cli(), __iax2_show_peers(), __queues_show(), _sip_show_peers(), aco_set_defaults(), action_confbridgelistrooms(), action_meetmelist(), add_ice_to_sdp(), alias_show(), ao2_iterator_cleanup(), ast_channel_iterator_destroy(), ast_data_iterator_end(), ast_data_search_match(), ast_format_cap_get_type(), ast_format_cap_has_joint(), ast_format_cap_has_type(), ast_format_cap_identical(), ast_format_cap_iter_end(), ast_format_cap_joint(), ast_format_cap_to_old_bitfield(), ast_merge_contexts_and_delete(), ast_msg_var_iterator_destroy(), ast_pickup_find_by_group(), ast_print_namedgroups(), ast_srtp_unprotect(), ast_var_indications(), ast_var_indications_table(), astman_verify_session_readpermissions(), astman_verify_session_writepermissions(), authenticate(), authenticate_reply(), build_dialplan_useage_map(), build_format_list_array(), calendar_query_exec(), check_access(), clear_queue(), clear_stats(), cli_console_active(), cli_display_named_acl_list(), cli_fax_show_sessions(), cli_list_devices(), cli_tps_report(), compare_weight(), complete_confbridge_name(), complete_core_id(), complete_core_show_hint(), complete_country(), complete_iax2_peers(), complete_iax2_unregister(), complete_queue(), complete_queue_remove_member(), complete_sip_peer(), complete_sip_registered_peer(), complete_sip_user(), complete_sipch(), complete_userno(), conf_queue_dtmf(), config_hook_exec(), data_filter_find(), data_get_xml_add_child(), data_odbc_provider_handler(), data_provider_print_cli(), data_provider_release_all(), data_result_generate_node(), data_result_manager_output(), delete_profiles(), delete_routes(), delete_users(), destroy_pvts(), dialgroup_read(), do_parking_thread(), dump_queue_members(), extension_state_cb(), fax_session_tab_complete(), find_call(), find_queue_by_name_rt(), find_ringing_channel(), find_session(), find_session_by_nonce(), free_members(), get_device_state_causing_channels(), get_member_status(), handle_cli_confbridge_list(), handle_cli_iax2_show_callno_limits(), handle_cli_iax2_show_users(), handle_cli_indication_show(), handle_cli_moh_show_classes(), handle_cli_moh_show_files(), handle_cli_odbc_show(), handle_cli_status(), handle_feature_show(), handle_manager_show_event(), handle_manager_show_events(), handle_parkedcalls(), handle_presencechange(), handle_show_calendar(), handle_show_calendars(), handle_show_hint(), handle_show_hints(), handle_show_named_acl_cmd(), handle_show_routes(), handle_showmanconn(), handle_skel_show_games(), handle_skel_show_levels(), handle_statechange(), hints_data_provider_get(), iax2_getpeername(), iax2_getpeertrunk(), interface_exists(), jingle_add_google_candidates_to_transport(), jingle_add_ice_udp_candidates_to_transport(), jingle_request(), joint_copy_helper(), kill_duplicate_offers(), local_devicestate(), locals_show(), manager_iax2_show_peer_list(), manager_optimize_away(), manager_parking_status(), manager_queues_status(), manager_queues_summary(), manager_sip_peer_status(), meetme_menu_admin_extended(), meetme_show_cmd(), moh_rescan_files(), msg_func_write(), num_available_members(), peers_data_provider_get(), poke_all_peers(), pp_each_user_helper(), prune_peers(), prune_users(), purge_sessions(), queue_function_mem_read(), queue_function_qac_dep(), queue_function_queuememberlist(), queues_data_provider_get(), queues_data_provider_get_helper(), reload(), rt_handle_member_record(), set_member_paused(), set_member_value(), sip_keepalive_all_peers(), sip_poke_all_peers(), sip_prune_realtime(), sip_show_channel(), sip_show_history(), sip_show_inuse(), sip_show_tcp(), sip_show_users(), sla_calc_station_delays(), sla_change_trunk_state(), sla_queue_event_conf(), sla_show_stations(), sla_show_trunks(), stop_streams(), tps_taskprocessor_tab_complete(), try_calling(), unload_module(), update_queue(), update_realtime_members(), users_data_provider_get(), xmpp_pubsub_create_affiliations(), xmpp_show_buddies(), and xmpp_show_clients().

{
   ao2_ref(iter->c, -1);
   if (iter->flags & AO2_ITERATOR_MALLOCD) {
      ast_free(iter);
   } else {
      iter->c = NULL;
   }
}

struct ao2_iterator ao2_iterator_init	(	struct ao2_container *	c,
		int	flags
	)		[read]

Create an iterator for a container.

initialize an iterator so we start from the first object

Definition at line 1244 of file astobj2.c.

References ao2_ref, ao2_iterator::c, and ao2_iterator::flags.

Referenced by __ast_data_search_cmp_structure(), __ast_manager_event_multichan(), __data_result_print_cli(), __iax2_show_peers(), __queues_show(), aco_set_defaults(), action_confbridgelistrooms(), action_meetmelist(), add_ice_to_sdp(), alias_show(), ast_channel_iterator_all_new(), ast_data_iterator_init(), ast_data_search_match(), ast_format_cap_get_type(), ast_format_cap_has_joint(), ast_format_cap_has_type(), ast_format_cap_identical(), ast_format_cap_iter_start(), ast_format_cap_joint(), ast_format_cap_to_old_bitfield(), ast_merge_contexts_and_delete(), ast_msg_var_iterator_init(), ast_pickup_find_by_group(), ast_print_namedgroups(), ast_srtp_unprotect(), ast_tone_zone_iterator_init(), astman_verify_session_readpermissions(), astman_verify_session_writepermissions(), authenticate(), authenticate_reply(), build_dialplan_useage_map(), build_format_list_array(), calendar_query_exec(), check_access(), clear_queue(), clear_stats(), cli_console_active(), cli_display_named_acl_list(), cli_fax_show_sessions(), cli_list_devices(), cli_tps_report(), compare_weight(), complete_confbridge_name(), complete_core_id(), complete_core_show_hint(), complete_country(), complete_iax2_peers(), complete_iax2_unregister(), complete_queue(), complete_queue_remove_member(), complete_sip_peer(), complete_sip_registered_peer(), complete_sip_user(), complete_sipch(), complete_userno(), conf_queue_dtmf(), config_hook_exec(), data_filter_find(), data_get_xml_add_child(), data_odbc_provider_handler(), data_provider_print_cli(), data_provider_release_all(), data_result_generate_node(), data_result_manager_output(), delete_profiles(), delete_routes(), delete_users(), destroy_pvts(), dialgroup_read(), do_parking_thread(), dump_queue_members(), extension_state_cb(), fax_session_tab_complete(), find_queue_by_name_rt(), find_ringing_channel(), find_session(), find_session_by_nonce(), free_members(), get_device_state_causing_channels(), get_member_status(), handle_cli_confbridge_list(), handle_cli_iax2_show_callno_limits(), handle_cli_iax2_show_users(), handle_cli_moh_show_classes(), handle_cli_moh_show_files(), handle_cli_odbc_show(), handle_cli_status(), handle_feature_show(), handle_manager_show_event(), handle_parkedcalls(), handle_presencechange(), handle_show_calendar(), handle_show_calendars(), handle_show_hint(), handle_show_hints(), handle_show_named_acl_cmd(), handle_show_routes(), handle_showmanconn(), handle_skel_show_games(), handle_skel_show_levels(), handle_statechange(), hints_data_provider_get(), iax2_getpeername(), iax2_getpeertrunk(), interface_exists(), internal_ao2_callback(), jingle_add_google_candidates_to_transport(), jingle_add_ice_udp_candidates_to_transport(), jingle_request(), joint_copy_helper(), local_devicestate(), locals_show(), manager_iax2_show_peer_list(), manager_optimize_away(), manager_parking_status(), manager_parkinglot_list(), manager_queues_status(), manager_queues_summary(), manager_sip_peer_status(), meetme_menu_admin_extended(), meetme_show_cmd(), moh_rescan_files(), msg_func_write(), num_available_members(), peers_data_provider_get(), poke_all_peers(), pp_each_user_helper(), prune_peers(), prune_users(), purge_sessions(), queue_function_mem_read(), queue_function_qac_dep(), queue_function_queuememberlist(), queues_data_provider_get(), queues_data_provider_get_helper(), reload(), rt_handle_member_record(), set_member_paused(), set_member_value(), sip_keepalive_all_peers(), sip_poke_all_peers(), sip_prune_realtime(), sip_show_channel(), sip_show_history(), sip_show_inuse(), sip_show_tcp(), sip_show_users(), sla_calc_station_delays(), sla_change_trunk_state(), sla_queue_event_conf(), sla_show_stations(), sla_show_trunks(), stop_streams(), tps_taskprocessor_tab_complete(), try_calling(), unload_module(), update_queue(), update_realtime_members(), users_data_provider_get(), xmpp_pubsub_create_affiliations(), xmpp_show_buddies(), and xmpp_show_clients().

{
   struct ao2_iterator a = {
      .c = c,
      .flags = flags
   };

   ao2_ref(c, +1);

   return a;
}

int ao2_match_by_addr	(	void *	user_data,
		void *	arg,
		int	flags
	)

another convenience function is a callback that matches on address

A common ao2_callback is one that matches by address.

Definition at line 938 of file astobj2.c.

References CMP_MATCH, and CMP_STOP.

Referenced by __ao2_unlink(), __ao2_unlink_debug(), load_module(), and load_odbc_config().

{
   return (user_data == arg) ? (CMP_MATCH | CMP_STOP) : 0;
}

void* ao2_object_get_lockaddr

(

void *

obj

)

Return the mutex lock address of an object.

Parameters:

[in]

obj

A pointer to the object we want.

Returns:

the address of the mutex lock, else NULL.

This function comes in handy mainly for debugging locking situations, where the locking trace code reports the lock address, this allows you to correlate against object address, to match objects to reported locks.

Since:

1.6.1

Definition at line 406 of file astobj2.c.

References AO2_ALLOC_OPT_LOCK_MASK, AO2_ALLOC_OPT_LOCK_MUTEX, INTERNAL_OBJ(), INTERNAL_OBJ_MUTEX, ao2_lock_priv::lock, astobj2_lock::mutex, __priv_data::options, and astobj2::priv_data.

Referenced by bridge_channel_join_multithreaded(), bridge_channel_join_singlethreaded(), and db_sync_thread().

{
   struct astobj2 *obj = INTERNAL_OBJ(user_data);
   struct astobj2_lock *obj_mutex;

   if (obj == NULL) {
      return NULL;
   }

   switch (obj->priv_data.options & AO2_ALLOC_OPT_LOCK_MASK) {
   case AO2_ALLOC_OPT_LOCK_MUTEX:
      obj_mutex = INTERNAL_OBJ_MUTEX(user_data);
      return &obj_mutex->mutex.lock;
   default:
      break;
   }

   return NULL;
}

int astobj2_init

(

void

)

Provided by astobj2.c

Definition at line 1721 of file astobj2.c.

References ARRAY_LEN, ast_cli_register_multiple(), and ast_register_atexit().

Referenced by main().

{
#ifdef AO2_DEBUG
   ast_cli_register_multiple(cli_astobj2, ARRAY_LEN(cli_astobj2));
   ast_register_atexit(astobj2_cleanup);
#endif

   return 0;
}

static int cb_true	(	void *	user_data,
		void *	arg,
		int	flags
	)		[static]

special callback that matches all

Definition at line 975 of file astobj2.c.

References CMP_MATCH.

Referenced by internal_ao2_callback().

{
   return CMP_MATCH;
}

static int cb_true_data	(	void *	user_data,
		void *	arg,
		void *	data,
		int	flags
	)		[static]

similar to cb_true, but is an ao2_callback_data_fn instead

Definition at line 983 of file astobj2.c.

References CMP_MATCH.

Referenced by internal_ao2_callback().

{
   return CMP_MATCH;
}

static int cd_cb	(	void *	obj,
		void *	arg,
		int	flag
	)		[static]

Definition at line 1379 of file astobj2.c.

References __ao2_ref().

Referenced by container_destruct().

{
   __ao2_ref(obj, -1);
   return 0;
}

static int cd_cb_debug	(	void *	obj,
		void *	arg,
		int	flag
	)		[static]

Definition at line 1385 of file astobj2.c.

References __ao2_ref_debug().

Referenced by container_destruct_debug().

{
   __ao2_ref_debug(obj, -1, "deref object via container destroy",  __FILE__, __LINE__, __PRETTY_FUNCTION__);
   return 0;
}

static void container_destruct

(

void *

c

)

[static]

Definition at line 1391 of file astobj2.c.

References __ao2_callback(), ast_atomic_fetchadd_int(), ast_free, AST_LIST_REMOVE_HEAD, ao2_container::buckets, cd_cb(), bucket_entry::entry, ao2_container::n_buckets, and OBJ_UNLINK.

Referenced by __ao2_container_alloc(), and __ao2_container_alloc_debug().

{
   struct ao2_container *c = _c;
   int i;

   __ao2_callback(c, OBJ_UNLINK, cd_cb, NULL);

   for (i = 0; i < c->n_buckets; i++) {
      struct bucket_entry *current;

      while ((current = AST_LIST_REMOVE_HEAD(&c->buckets[i], entry))) {
         ast_free(current);
      }
   }

#ifdef AO2_DEBUG
   ast_atomic_fetchadd_int(&ao2.total_containers, -1);
#endif
}

static void container_destruct_debug

(

void *

c

)

[static]

Definition at line 1411 of file astobj2.c.

References __ao2_callback_debug(), ast_atomic_fetchadd_int(), ast_free, AST_LIST_REMOVE_HEAD, ao2_container::buckets, cd_cb_debug(), bucket_entry::entry, ao2_container::n_buckets, and OBJ_UNLINK.

Referenced by __ao2_container_alloc_debug().

{
   struct ao2_container *c = _c;
   int i;

   __ao2_callback_debug(c, OBJ_UNLINK, cd_cb_debug, NULL, "container_destruct_debug called", __FILE__, __LINE__, __PRETTY_FUNCTION__);

   for (i = 0; i < c->n_buckets; i++) {
      struct bucket_entry *current;

      while ((current = AST_LIST_REMOVE_HEAD(&c->buckets[i], entry))) {
         ast_free(current);
      }
   }

#ifdef AO2_DEBUG
   ast_atomic_fetchadd_int(&ao2.total_containers, -1);
#endif
}

static int dup_obj_cb	(	void *	obj,
		void *	arg,
		int	flags
	)		[static]

Definition at line 1443 of file astobj2.c.

References __ao2_link(), CMP_MATCH, CMP_STOP, and OBJ_NOLOCK.

Referenced by ao2_container_dup().

{
   struct ao2_container *dest = arg;

   return __ao2_link(dest, obj, OBJ_NOLOCK) ? 0 : (CMP_MATCH | CMP_STOP);
}

static int hash_zero	(	const void *	user_obj,
		const int	flags
	)		[static]

always zero hash function

it is convenient to have a hash function that always returns 0. This is basically used when we want to have a container that is a simple linked list.

Returns:

0

Definition at line 808 of file astobj2.c.

Referenced by internal_ao2_container_alloc().

{
   return 0;
}

static void* internal_ao2_alloc	(	size_t	data_size,
		ao2_destructor_fn	destructor_fn,
		unsigned int	options,
		const char *	file,
		int	line,
		const char *	func
	)		[static]

Definition at line 545 of file astobj2.c.

References __ast_calloc(), __AST_DEBUG_MALLOC, __LOG_DEBUG, AO2_ALLOC_OPT_LOCK_MASK, AO2_ALLOC_OPT_LOCK_MUTEX, AO2_ALLOC_OPT_LOCK_NOLOCK, AO2_ALLOC_OPT_LOCK_RWLOCK, AO2_MAGIC, ast_atomic_fetchadd_int(), ast_calloc, ast_log(), ast_mutex_init, ast_rwlock_init, __priv_data::data_size, __priv_data::destructor_fn, EXTERNAL_OBJ, ao2_lock_priv::lock, ao2_rwlock_priv::lock, __priv_data::magic, astobj2_lock::mutex, __priv_data::options, astobj2::priv_data, astobj2_lock::priv_data, astobj2_rwlock::priv_data, __priv_data::ref_counter, and astobj2_rwlock::rwlock.

Referenced by __ao2_alloc(), and __ao2_alloc_debug().

{
   /* allocation */
   struct astobj2 *obj;
   struct astobj2_lock *obj_mutex;
   struct astobj2_rwlock *obj_rwlock;

   if (data_size < sizeof(void *)) {
      /*
       * We always alloc at least the size of a void *,
       * for debugging purposes.
       */
      data_size = sizeof(void *);
   }

   switch (options & AO2_ALLOC_OPT_LOCK_MASK) {
   case AO2_ALLOC_OPT_LOCK_MUTEX:
#if defined(__AST_DEBUG_MALLOC)
      obj_mutex = __ast_calloc(1, sizeof(*obj_mutex) + data_size, file, line, func);
#else
      obj_mutex = ast_calloc(1, sizeof(*obj_mutex) + data_size);
#endif
      if (obj_mutex == NULL) {
         return NULL;
      }

      ast_mutex_init(&obj_mutex->mutex.lock);
      obj = (struct astobj2 *) &obj_mutex->priv_data;
      break;
   case AO2_ALLOC_OPT_LOCK_RWLOCK:
#if defined(__AST_DEBUG_MALLOC)
      obj_rwlock = __ast_calloc(1, sizeof(*obj_rwlock) + data_size, file, line, func);
#else
      obj_rwlock = ast_calloc(1, sizeof(*obj_rwlock) + data_size);
#endif
      if (obj_rwlock == NULL) {
         return NULL;
      }

      ast_rwlock_init(&obj_rwlock->rwlock.lock);
      obj = (struct astobj2 *) &obj_rwlock->priv_data;
      break;
   case AO2_ALLOC_OPT_LOCK_NOLOCK:
#if defined(__AST_DEBUG_MALLOC)
      obj = __ast_calloc(1, sizeof(*obj) + data_size, file, line, func);
#else
      obj = ast_calloc(1, sizeof(*obj) + data_size);
#endif
      if (obj == NULL) {
         return NULL;
      }
      break;
   default:
      /* Invalid option value. */
      ast_log(__LOG_DEBUG, file, line, func, "Invalid lock option requested\n");
      return NULL;
   }

   /* Initialize common ao2 values. */
   obj->priv_data.ref_counter = 1;
   obj->priv_data.destructor_fn = destructor_fn;   /* can be NULL */
   obj->priv_data.data_size = data_size;
   obj->priv_data.options = options;
   obj->priv_data.magic = AO2_MAGIC;

#ifdef AO2_DEBUG
   ast_atomic_fetchadd_int(&ao2.total_objects, 1);
   ast_atomic_fetchadd_int(&ao2.total_mem, data_size);
   ast_atomic_fetchadd_int(&ao2.total_refs, 1);
#endif

   /* return a pointer to the user data */
   return EXTERNAL_OBJ(obj);
}

static void* internal_ao2_callback	(	struct ao2_container *	c,
		enum search_flags	flags,
		void *	cb_fn,
		void *	arg,
		void *	data,
		enum ao2_callback_type	type,
		const char *	tag,
		const char *	file,
		int	line,
		const char *	func
	)		[static]

Browse the container using different stategies accoding the flags.

Returns:

Is a pointer to an object or to a list of object if OBJ_MULTIPLE is specified. Luckily, for debug purposes, the added args (tag, file, line, func) aren't an excessive load to the system, as the callback should not be called as often as, say, the ao2_ref func is called.

Definition at line 996 of file astobj2.c.

References __ao2_container_alloc(), __ao2_link(), __ao2_link_debug(), __ao2_ref(), __ao2_ref_debug(), adjust_lock(), AO2_ALLOC_OPT_LOCK_NOLOCK, ao2_iterator_init(), AO2_ITERATOR_MALLOCD, AO2_ITERATOR_UNLINK, AO2_LOCK_REQ_MUTEX, AO2_LOCK_REQ_RDLOCK, AO2_LOCK_REQ_WRLOCK, ao2_rdlock, ao2_ref, ao2_unlock, ao2_wrlock, ast_atomic_fetchadd_int(), ast_calloc, ast_free, AST_LIST_REMOVE_CURRENT, AST_LIST_TRAVERSE_SAFE_BEGIN, AST_LIST_TRAVERSE_SAFE_END, bucket_entry::astobj, ao2_container::buckets, cb_true(), cb_true_data(), CMP_MATCH, CMP_STOP, ao2_container::elements, bucket_entry::entry, EXTERNAL_OBJ, ao2_container::hash_fn, INTERNAL_OBJ(), last, match(), ao2_container::n_buckets, OBJ_CONTINUE, OBJ_KEY, OBJ_MULTIPLE, OBJ_NODATA, OBJ_NOLOCK, OBJ_POINTER, OBJ_UNLINK, ao2_container::version, and WITH_DATA.

Referenced by __ao2_callback(), __ao2_callback_data(), __ao2_callback_data_debug(), and __ao2_callback_debug().

{
   int i, start, last;  /* search boundaries */
   enum ao2_lock_req orig_lock;
   void *ret = NULL;
   ao2_callback_fn *cb_default = NULL;
   ao2_callback_data_fn *cb_withdata = NULL;
   struct ao2_container *multi_container = NULL;
   struct ao2_iterator *multi_iterator = NULL;

   if (INTERNAL_OBJ(c) == NULL) {   /* safety check on the argument */
      return NULL;
   }

   /*
    * This logic is used so we can support OBJ_MULTIPLE with OBJ_NODATA
    * turned off.  This if statement checks for the special condition
    * where multiple items may need to be returned.
    */
   if ((flags & (OBJ_MULTIPLE | OBJ_NODATA)) == OBJ_MULTIPLE) {
      /* we need to return an ao2_iterator with the results,
       * as there could be more than one. the iterator will
       * hold the only reference to a container that has all the
       * matching objects linked into it, so when the iterator
       * is destroyed, the container will be automatically
       * destroyed as well.
       */
      multi_container = __ao2_container_alloc(AO2_ALLOC_OPT_LOCK_NOLOCK, 1, NULL, NULL);
      if (!multi_container) {
         return NULL;
      }
      if (!(multi_iterator = ast_calloc(1, sizeof(*multi_iterator)))) {
         ao2_ref(multi_container, -1);
         return NULL;
      }
   }

   /* override the match function if necessary */
   if (cb_fn == NULL) { /* if NULL, match everything */
      if (type == WITH_DATA) {
         cb_withdata = cb_true_data;
      } else {
         cb_default = cb_true;
      }
   } else {
      /* We do this here to avoid the per object casting penalty (even though
         that is probably optimized away anyway). */
      if (type == WITH_DATA) {
         cb_withdata = cb_fn;
      } else {
         cb_default = cb_fn;
      }
   }

   /*
    * XXX this can be optimized.
    * If we have a hash function and lookup by pointer,
    * run the hash function. Otherwise, scan the whole container
    * (this only for the time being. We need to optimize this.)
    */
   if ((flags & (OBJ_POINTER | OBJ_KEY))) {
      /* we know hash can handle this case */
      start = i = c->hash_fn(arg, flags & (OBJ_POINTER | OBJ_KEY)) % c->n_buckets;
   } else {
      /* don't know, let's scan all buckets */
      start = i = -1;      /* XXX this must be fixed later. */
   }

   /* determine the search boundaries: i..last-1 */
   if (i < 0) {
      start = i = 0;
      last = c->n_buckets;
   } else if ((flags & OBJ_CONTINUE)) {
      last = c->n_buckets;
   } else {
      last = i + 1;
   }

   /* avoid modifications to the content */
   if (flags & OBJ_NOLOCK) {
      if (flags & OBJ_UNLINK) {
         orig_lock = adjust_lock(c, AO2_LOCK_REQ_WRLOCK, 1);
      } else {
         orig_lock = adjust_lock(c, AO2_LOCK_REQ_RDLOCK, 1);
      }
   } else {
      orig_lock = AO2_LOCK_REQ_MUTEX;
      if (flags & OBJ_UNLINK) {
         ao2_wrlock(c);
      } else {
         ao2_rdlock(c);
      }
   }

   for (; i < last ; i++) {
      /* scan the list with prev-cur pointers */
      struct bucket_entry *cur;

      AST_LIST_TRAVERSE_SAFE_BEGIN(&c->buckets[i], cur, entry) {
         int match = (CMP_MATCH | CMP_STOP);

         if (type == WITH_DATA) {
            match &= cb_withdata(EXTERNAL_OBJ(cur->astobj), arg, data, flags);
         } else {
            match &= cb_default(EXTERNAL_OBJ(cur->astobj), arg, flags);
         }

         /* we found the object, performing operations according flags */
         if (match == 0) { /* no match, no stop, continue */
            continue;
         } else if (match == CMP_STOP) {  /* no match but stop, we are done */
            i = last;
            break;
         }

         /* we have a match (CMP_MATCH) here */
         if (!(flags & OBJ_NODATA)) {  /* if must return the object, record the value */
            /* it is important to handle this case before the unlink */
            ret = EXTERNAL_OBJ(cur->astobj);
            if (!(flags & (OBJ_UNLINK | OBJ_MULTIPLE))) {
               if (tag) {
                  __ao2_ref_debug(ret, 1, tag, file, line, func);
               } else {
                  __ao2_ref(ret, 1);
               }
            }
         }

         /* If we are in OBJ_MULTIPLE mode and OBJ_NODATA is off,
          * link the object into the container that will hold the results.
          */
         if (ret && (multi_container != NULL)) {
            if (tag) {
               __ao2_link_debug(multi_container, ret, flags, tag, file, line, func);
            } else {
               __ao2_link(multi_container, ret, flags);
            }
            ret = NULL;
         }

         if (flags & OBJ_UNLINK) {  /* must unlink */
            /* we are going to modify the container, so update version */
            ast_atomic_fetchadd_int(&c->version, 1);
            AST_LIST_REMOVE_CURRENT(entry);
            /* update number of elements */
            ast_atomic_fetchadd_int(&c->elements, -1);

            /* - When unlinking and not returning the result, (OBJ_NODATA), the ref from the container
             * must be decremented.
             * - When unlinking with OBJ_MULTIPLE the ref from the original container
             * must be decremented regardless if OBJ_NODATA is used. This is because the result is
             * returned in a new container that already holds its own ref for the object. If the ref
             * from the original container is not accounted for here a memory leak occurs. */
            if (flags & (OBJ_NODATA | OBJ_MULTIPLE)) {
               if (tag)
                  __ao2_ref_debug(EXTERNAL_OBJ(cur->astobj), -1, tag, file, line, func);
               else
                  __ao2_ref(EXTERNAL_OBJ(cur->astobj), -1);
            }
            ast_free(cur); /* free the link record */
         }

         if ((match & CMP_STOP) || !(flags & OBJ_MULTIPLE)) {
            /* We found our only (or last) match, so force an exit from
               the outside loop. */
            i = last;
            break;
         }
      }
      AST_LIST_TRAVERSE_SAFE_END;

      if (ret) {
         break;
      }

      if (i == c->n_buckets - 1 && (flags & OBJ_POINTER) && (flags & OBJ_CONTINUE)) {
         /* Move to the beginning to ensure we check every bucket */
         i = -1;
         last = start;
      }
   }

   if (flags & OBJ_NOLOCK) {
      adjust_lock(c, orig_lock, 0);
   } else {
      ao2_unlock(c);
   }

   /* if multi_container was created, we are returning multiple objects */
   if (multi_container != NULL) {
      *multi_iterator = ao2_iterator_init(multi_container,
         AO2_ITERATOR_UNLINK | AO2_ITERATOR_MALLOCD);
      ao2_ref(multi_container, -1);
      return multi_iterator;
   } else {
      return ret;
   }
}

static struct ao2_container* internal_ao2_container_alloc	(	struct ao2_container *	c,
		unsigned int	n_buckets,
		ao2_hash_fn *	hash_fn,
		ao2_callback_fn *	cmp_fn
	)		[static, read]

Definition at line 816 of file astobj2.c.

References ast_atomic_fetchadd_int(), ao2_container::cmp_fn, ao2_container::hash_fn, hash_zero(), ao2_container::n_buckets, and ao2_container::version.

Referenced by __ao2_container_alloc(), and __ao2_container_alloc_debug().

{
   /* XXX maybe consistency check on arguments ? */
   /* compute the container size */

   if (!c) {
      return NULL;
   }

   c->version = 1;   /* 0 is a reserved value here */
   c->n_buckets = hash_fn ? n_buckets : 1;
   c->hash_fn = hash_fn ? hash_fn : hash_zero;
   c->cmp_fn = cmp_fn;

#ifdef AO2_DEBUG
   ast_atomic_fetchadd_int(&ao2.total_containers, 1);
#endif

   return c;
}

static void* internal_ao2_iterator_next	(	struct ao2_iterator *	iter,
		const char *	tag,
		const char *	file,
		int	line,
		const char *	func
	)		[static]

Definition at line 1272 of file astobj2.c.

References __ao2_ref(), __ao2_ref_debug(), adjust_lock(), AO2_ITERATOR_DONTLOCK, AO2_ITERATOR_UNLINK, AO2_LOCK_REQ_MUTEX, AO2_LOCK_REQ_RDLOCK, AO2_LOCK_REQ_WRLOCK, ao2_rdlock, ao2_unlock, ao2_wrlock, ast_atomic_fetchadd_int(), ast_free, AST_LIST_NEXT, AST_LIST_REMOVE, AST_LIST_TRAVERSE, bucket_entry::astobj, ao2_iterator::bucket, ao2_container::buckets, ao2_iterator::c, ao2_iterator::c_version, ao2_container::elements, bucket_entry::entry, EXTERNAL_OBJ, ao2_iterator::flags, INTERNAL_OBJ(), ao2_container::n_buckets, ao2_iterator::obj, bucket_entry::version, ao2_container::version, and ao2_iterator::version.

Referenced by __ao2_iterator_next(), and __ao2_iterator_next_debug().

{
   int lim;
   enum ao2_lock_req orig_lock;
   struct bucket_entry *p = NULL;
   void *ret;

   if (INTERNAL_OBJ(iter->c) == NULL) {
      return NULL;
   }

   if (iter->flags & AO2_ITERATOR_DONTLOCK) {
      if (iter->flags & AO2_ITERATOR_UNLINK) {
         orig_lock = adjust_lock(iter->c, AO2_LOCK_REQ_WRLOCK, 1);
      } else {
         orig_lock = adjust_lock(iter->c, AO2_LOCK_REQ_RDLOCK, 1);
      }
   } else {
      orig_lock = AO2_LOCK_REQ_MUTEX;
      if (iter->flags & AO2_ITERATOR_UNLINK) {
         ao2_wrlock(iter->c);
      } else {
         ao2_rdlock(iter->c);
      }
   }

   /* optimization. If the container is unchanged and
    * we have a pointer, try follow it
    */
   if (iter->c->version == iter->c_version && (p = iter->obj)) {
      if ((p = AST_LIST_NEXT(p, entry))) {
         goto found;
      }
      /* nope, start from the next bucket */
      iter->bucket++;
      iter->version = 0;
      iter->obj = NULL;
   }

   lim = iter->c->n_buckets;

   /* Browse the buckets array, moving to the next
    * buckets if we don't find the entry in the current one.
    * Stop when we find an element with version number greater
    * than the current one (we reset the version to 0 when we
    * switch buckets).
    */
   for (; iter->bucket < lim; iter->bucket++, iter->version = 0) {
      /* scan the current bucket */
      AST_LIST_TRAVERSE(&iter->c->buckets[iter->bucket], p, entry) {
         if (p->version > iter->version) {
            goto found;
         }
      }
   }

found:
   if (p) {
      ret = EXTERNAL_OBJ(p->astobj);
      if (iter->flags & AO2_ITERATOR_UNLINK) {
         /* we are going to modify the container, so update version */
         ast_atomic_fetchadd_int(&iter->c->version, 1);
         AST_LIST_REMOVE(&iter->c->buckets[iter->bucket], p, entry);
         /* update number of elements */
         ast_atomic_fetchadd_int(&iter->c->elements, -1);
         iter->version = 0;
         iter->obj = NULL;
         iter->c_version = iter->c->version;
         ast_free(p);
      } else {
         iter->version = p->version;
         iter->obj = p;
         iter->c_version = iter->c->version;

         /* inc refcount of returned object */
         if (tag) {
            __ao2_ref_debug(ret, 1, tag, file, line, func);
         } else {
            __ao2_ref(ret, 1);
         }
      }
   } else {
      ret = NULL;
   }

   if (iter->flags & AO2_ITERATOR_DONTLOCK) {
      adjust_lock(iter->c, orig_lock, 0);
   } else {
      ao2_unlock(iter->c);
   }

   return ret;
}

static struct bucket_entry* internal_ao2_link	(	struct ao2_container *	c,
		void *	user_data,
		int	flags,
		const char *	tag,
		const char *	file,
		int	line,
		const char *	func
	)		[static, read]

Definition at line 874 of file astobj2.c.

References __ao2_ref(), __ao2_ref_debug(), adjust_lock(), AO2_LOCK_REQ_MUTEX, AO2_LOCK_REQ_WRLOCK, ao2_unlock, ao2_wrlock, ast_atomic_fetchadd_int(), ast_calloc, AST_LIST_INSERT_TAIL, bucket_entry::astobj, ao2_container::buckets, ao2_container::elements, bucket_entry::entry, ao2_container::hash_fn, INTERNAL_OBJ(), ao2_container::n_buckets, OBJ_NOLOCK, OBJ_POINTER, bucket_entry::version, and ao2_container::version.

Referenced by __ao2_link(), and __ao2_link_debug().

{
   int i;
   enum ao2_lock_req orig_lock;
   /* create a new list entry */
   struct bucket_entry *p;
   struct astobj2 *obj = INTERNAL_OBJ(user_data);

   if (obj == NULL) {
      return NULL;
   }

   if (INTERNAL_OBJ(c) == NULL) {
      return NULL;
   }

   p = ast_calloc(1, sizeof(*p));
   if (!p) {
      return NULL;
   }

   i = abs(c->hash_fn(user_data, OBJ_POINTER));

   if (flags & OBJ_NOLOCK) {
      orig_lock = adjust_lock(c, AO2_LOCK_REQ_WRLOCK, 1);
   } else {
      ao2_wrlock(c);
      orig_lock = AO2_LOCK_REQ_MUTEX;
   }

   i %= c->n_buckets;
   p->astobj = obj;
   p->version = ast_atomic_fetchadd_int(&c->version, 1);
   AST_LIST_INSERT_TAIL(&c->buckets[i], p, entry);
   ast_atomic_fetchadd_int(&c->elements, 1);

   if (tag) {
      __ao2_ref_debug(user_data, +1, tag, file, line, func);
   } else {
      __ao2_ref(user_data, +1);
   }

   if (flags & OBJ_NOLOCK) {
      adjust_lock(c, orig_lock, 0);
   } else {
      ao2_unlock(c);
   }

   return p;
}

static int internal_ao2_ref	(	void *	user_data,
		int	delta,
		const char *	file,
		int	line,
		const char *	func
	)		[static]

Definition at line 426 of file astobj2.c.

References __LOG_ERROR, AO2_ALLOC_OPT_LOCK_MASK, AO2_ALLOC_OPT_LOCK_MUTEX, AO2_ALLOC_OPT_LOCK_NOLOCK, AO2_ALLOC_OPT_LOCK_RWLOCK, ast_atomic_fetchadd_int(), ast_free, ast_log(), ast_mutex_destroy, ast_rwlock_destroy, __priv_data::data_size, __priv_data::destructor_fn, INTERNAL_OBJ(), INTERNAL_OBJ_MUTEX, INTERNAL_OBJ_RWLOCK, ao2_lock_priv::lock, ao2_rwlock_priv::lock, astobj2_lock::mutex, __priv_data::options, astobj2::priv_data, __priv_data::ref_counter, and astobj2_rwlock::rwlock.

Referenced by __ao2_ref(), and __ao2_ref_debug().

{
   struct astobj2 *obj = INTERNAL_OBJ(user_data);
   struct astobj2_lock *obj_mutex;
   struct astobj2_rwlock *obj_rwlock;
   int current_value;
   int ret;

   if (obj == NULL) {
      return -1;
   }

   /* if delta is 0, just return the refcount */
   if (delta == 0) {
      return obj->priv_data.ref_counter;
   }

   /* we modify with an atomic operation the reference counter */
   ret = ast_atomic_fetchadd_int(&obj->priv_data.ref_counter, delta);
   current_value = ret + delta;

#ifdef AO2_DEBUG
   ast_atomic_fetchadd_int(&ao2.total_refs, delta);
#endif

   if (0 < current_value) {
      /* The object still lives. */
      return ret;
   }

   /* this case must never happen */
   if (current_value < 0) {
      ast_log(__LOG_ERROR, file, line, func,
         "Invalid refcount %d on ao2 object %p\n", current_value, user_data);
   }

   /* last reference, destroy the object */
   if (obj->priv_data.destructor_fn != NULL) {
      obj->priv_data.destructor_fn(user_data);
   }

#ifdef AO2_DEBUG
   ast_atomic_fetchadd_int(&ao2.total_mem, - obj->priv_data.data_size);
   ast_atomic_fetchadd_int(&ao2.total_objects, -1);
#endif

   switch (obj->priv_data.options & AO2_ALLOC_OPT_LOCK_MASK) {
   case AO2_ALLOC_OPT_LOCK_MUTEX:
      obj_mutex = INTERNAL_OBJ_MUTEX(user_data);
      ast_mutex_destroy(&obj_mutex->mutex.lock);

      /*
       * For safety, zero-out the astobj2_lock header and also the
       * first word of the user-data, which we make sure is always
       * allocated.
       */
      memset(obj_mutex, '\0', sizeof(*obj_mutex) + sizeof(void *) );
      ast_free(obj_mutex);
      break;
   case AO2_ALLOC_OPT_LOCK_RWLOCK:
      obj_rwlock = INTERNAL_OBJ_RWLOCK(user_data);
      ast_rwlock_destroy(&obj_rwlock->rwlock.lock);

      /*
       * For safety, zero-out the astobj2_rwlock header and also the
       * first word of the user-data, which we make sure is always
       * allocated.
       */
      memset(obj_rwlock, '\0', sizeof(*obj_rwlock) + sizeof(void *) );
      ast_free(obj_rwlock);
      break;
   case AO2_ALLOC_OPT_LOCK_NOLOCK:
      /*
       * For safety, zero-out the astobj2 header and also the first
       * word of the user-data, which we make sure is always
       * allocated.
       */
      memset(obj, '\0', sizeof(*obj) + sizeof(void *) );
      ast_free(obj);
      break;
   default:
      ast_log(__LOG_ERROR, file, line, func,
         "Invalid lock option on ao2 object %p\n", user_data);
      break;
   }

   return ret;
}

static struct astobj2* INTERNAL_OBJ

(

void *

user_data

)

[static, read]

convert from a pointer _p to a user-defined object

Returns:

the pointer to the astobj2 structure

Definition at line 141 of file astobj2.c.

References AO2_MAGIC, ast_assert, ast_log(), LOG_ERROR, __priv_data::magic, and astobj2::priv_data.

Referenced by __ao2_container_clone(), __ao2_container_clone_debug(), __ao2_lock(), __ao2_ref_debug(), __ao2_trylock(), __ao2_unlink(), __ao2_unlink_debug(), __ao2_unlock(), adjust_lock(), ao2_object_get_lockaddr(), internal_ao2_callback(), internal_ao2_iterator_next(), internal_ao2_link(), and internal_ao2_ref().

{
   struct astobj2 *p;

   if (!user_data) {
      ast_log(LOG_ERROR, "user_data is NULL\n");
      return NULL;
   }

   p = (struct astobj2 *) ((char *) user_data - sizeof(*p));
   if (AO2_MAGIC != p->priv_data.magic) {
      if (p->priv_data.magic) {
         ast_log(LOG_ERROR, "bad magic number 0x%x for object %p\n",
            p->priv_data.magic, user_data);
      } else {
         ast_log(LOG_ERROR,
            "bad magic number for object %p. Object is likely destroyed.\n",
            user_data);
      }
      ast_assert(0);
      return NULL;
   }

   return p;
}