astobj2_container_private.h File Reference

Common, private definitions for astobj2 containers. More...

#include "asterisk/astobj2.h"

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Data Structures
struct	ao2_container
	Generic container type. More...
struct	ao2_container_methods
struct	ao2_container_node
	Generic container node. More...

Macros
#define	__container_unlink_node(node, flags)    __container_unlink_node_debug(node, flags, NULL, __FILE__, __LINE__, __PRETTY_FUNCTION__)
#define	AO2_TRAVERSAL_STATE_SIZE   100

Typedefs
typedef struct ao2_container *(*	ao2_container_alloc_empty_clone_fn) (struct ao2_container *self, const char *tag, const char *file, int line, const char *func)
	Create an empty copy of this container.
typedef void(*	ao2_container_destroy_fn) (struct ao2_container *self)
	Destroy this container.
typedef void(*	ao2_container_display) (struct ao2_container *self, void *where, ao2_prnt_fn *prnt, ao2_prnt_obj_fn *prnt_obj)
	Display contents of the specified container.
typedef void(*	ao2_container_find_cleanup_fn) (void *v_state)
	Cleanup the container traversal state.
typedef struct ao2_container_node *(*	ao2_container_find_first_fn) (struct ao2_container *self, enum search_flags flags, void *arg, void *v_state)
	Find the first container node in a traversal.
typedef struct ao2_container_node *(*	ao2_container_find_next_fn) (struct ao2_container *self, void *v_state, struct ao2_container_node *prev)
	Find the next container node in a traversal.
typedef enum ao2_container_insert(*	ao2_container_insert_fn) (struct ao2_container *self, struct ao2_container_node *node)
	Insert a node into this container.
typedef int(*	ao2_container_integrity) (struct ao2_container *self)
	Perform an integrity check on the specified container.
typedef struct ao2_container_node *(*	ao2_container_new_node_fn) (struct ao2_container *self, void *obj_new, const char *tag, const char *file, int line, const char *func)
	Create a new container node.
typedef void(*	ao2_container_statistics) (struct ao2_container *self, void *where, ao2_prnt_fn *prnt)
	Display statistics of the specified container.
typedef struct ao2_container_node *(*	ao2_iterator_next_fn) (struct ao2_container *self, struct ao2_container_node *prev, enum ao2_iterator_flags flags)
	Find the next non-empty iteration node in the container.
typedef void(*	ao2_link_node_stat_fn) (struct ao2_container *container, struct ao2_container_node *node)
typedef void(*	ao2_unlink_node_stat_fn) (struct ao2_container *container, struct ao2_container_node *node)

Enumerations
enum	ao2_callback_type { AO2_CALLBACK_DEFAULT , AO2_CALLBACK_WITH_DATA }
enum	ao2_container_insert { AO2_CONTAINER_INSERT_NODE_INSERTED , AO2_CONTAINER_INSERT_NODE_OBJ_REPLACED , AO2_CONTAINER_INSERT_NODE_REJECTED }
enum	ao2_unlink_node_flags { AO2_UNLINK_NODE_UNLINK_OBJECT = (1 << 0) , AO2_UNLINK_NODE_NOUNREF_OBJECT = (1 << 1) , AO2_UNLINK_NODE_UNREF_NODE = (1 << 2) , AO2_UNLINK_NODE_DEC_COUNT = (1 << 3) }

Functions
int	__container_unlink_node_debug (struct ao2_container_node *node, uint32_t flags, const char *tag, const char *file, int line, const char *func)
void	container_destruct (void *_c)
int	container_init (void)

Detailed Description

Common, private definitions for astobj2 containers.

Author

Richard Mudgett rmudg.nosp@m.ett@.nosp@m.digiu.nosp@m.m.co.nosp@m.m

Definition in file astobj2_container_private.h.

Macro Definition Documentation

__container_unlink_node

#define __container_unlink_node	(		node,
			flags
	)		__container_unlink_node_debug(node, flags, NULL, __FILE__, __LINE__, __PRETTY_FUNCTION__)

Definition at line 310 of file astobj2_container_private.h.

AO2_TRAVERSAL_STATE_SIZE

#define AO2_TRAVERSAL_STATE_SIZE   100

Allow enough room for container specific traversal state structs

Definition at line 60 of file astobj2_container_private.h.

Typedef Documentation

ao2_container_alloc_empty_clone_fn

typedef struct ao2_container *(* ao2_container_alloc_empty_clone_fn) (struct ao2_container *self, const char *tag, const char *file, int line, const char *func)

Create an empty copy of this container.

Parameters

self	Container to operate upon.
tag	used for debugging.
file	Debug file name invoked from
line	Debug line invoked from
func	Debug function name invoked from

Returns

empty-container on success.

Return values

NULL

on error.

Definition at line 82 of file astobj2_container_private.h.

ao2_container_destroy_fn

typedef void(* ao2_container_destroy_fn) (struct ao2_container *self)

Destroy this container.

Parameters

self	Container to operate upon.

Definition at line 82 of file astobj2_container_private.h.

ao2_container_display

typedef void(* ao2_container_display) (struct ao2_container *self, void *where, ao2_prnt_fn *prnt, ao2_prnt_obj_fn *prnt_obj)

Display contents of the specified container.

Parameters

self	Container to dump.
where	User data needed by prnt to determine where to put output.
prnt	Print output callback function to use.
prnt_obj	Callback function to print the given object's key. (NULL if not available)

Definition at line 179 of file astobj2_container_private.h.

ao2_container_find_cleanup_fn

typedef void(* ao2_container_find_cleanup_fn) (void *v_state)

Cleanup the container traversal state.

Parameters

v_state

Traversal state to cleanup.

Definition at line 154 of file astobj2_container_private.h.

ao2_container_find_first_fn

typedef struct ao2_container_node *(* ao2_container_find_first_fn) (struct ao2_container *self, enum search_flags flags, void *arg, void *v_state)

Find the first container node in a traversal.

Parameters

self	Container to operate upon.
flags	search_flags to control traversing the container
arg	Comparison callback arg parameter.
v_state	Traversal state to restart container traversal.

Returns

node-ptr of found node (Reffed).

Return values

NULL	when no node found.

Definition at line 82 of file astobj2_container_private.h.

ao2_container_find_next_fn

typedef struct ao2_container_node *(* ao2_container_find_next_fn) (struct ao2_container *self, void *v_state, struct ao2_container_node *prev)

Find the next container node in a traversal.

Parameters

self	Container to operate upon.
v_state	Traversal state to restart container traversal.
prev	Previous node returned by the traversal search functions. The ref ownership is passed back to this function.

Returns

node-ptr of found node (Reffed).

Return values

NULL	when no node found.

Definition at line 82 of file astobj2_container_private.h.

ao2_container_insert_fn

typedef enum ao2_container_insert(* ao2_container_insert_fn) (struct ao2_container *self, struct ao2_container_node *node)

Insert a node into this container.

Parameters

self	Container to operate upon.
node	Container node to insert into the container.

Returns

enum ao2_container_insert value.

Definition at line 82 of file astobj2_container_private.h.

ao2_container_integrity

typedef int(* ao2_container_integrity) (struct ao2_container *self)

Perform an integrity check on the specified container.

Parameters

self	Container to check integrity.

Note

The container is already locked for reading.

Return values

0	on success.
-1	on error.

Definition at line 202 of file astobj2_container_private.h.

ao2_container_new_node_fn

typedef struct ao2_container_node *(* ao2_container_new_node_fn) (struct ao2_container *self, void *obj_new, const char *tag, const char *file, int line, const char *func)

Create a new container node.

Parameters

self	Container to operate upon.
obj_new	Object to put into the node.
tag	used for debugging.
file	Debug file name invoked from
line	Debug line invoked from
func	Debug function name invoked from

Returns

initialized-node on success.

Return values

NULL

on error.

Definition at line 82 of file astobj2_container_private.h.

ao2_container_statistics

typedef void(* ao2_container_statistics) (struct ao2_container *self, void *where, ao2_prnt_fn *prnt)

Display statistics of the specified container.

Parameters

self	Container to display statistics.
where	User data needed by prnt to determine where to put output.
prnt	Print output callback function to use.

Note

The container is already locked for reading.

Definition at line 190 of file astobj2_container_private.h.

ao2_iterator_next_fn

typedef struct ao2_container_node *(* ao2_iterator_next_fn) (struct ao2_container *self, struct ao2_container_node *prev, enum ao2_iterator_flags flags)

Find the next non-empty iteration node in the container.

Parameters

self	Container to operate upon.
prev	Previous node returned by the iterator.
flags	search_flags to control iterating the container. Only AO2_ITERATOR_DESCENDING is useful by the method.

Note

The container is already locked.

Returns

node on success.

Return values

NULL	on error or no more nodes in the container.

Definition at line 154 of file astobj2_container_private.h.

ao2_link_node_stat_fn

typedef void(* ao2_link_node_stat_fn) (struct ao2_container *container, struct ao2_container_node *node)

Definition at line 212 of file astobj2_container_private.h.

ao2_unlink_node_stat_fn

typedef void(* ao2_unlink_node_stat_fn) (struct ao2_container *container, struct ao2_container_node *node)

Definition at line 222 of file astobj2_container_private.h.

Enumeration Type Documentation

ao2_callback_type

enum ao2_callback_type

Enumerator
AO2_CALLBACK_DEFAULT
AO2_CALLBACK_WITH_DATA

Definition at line 45 of file astobj2_container_private.h.

                       {
    AO2_CALLBACK_DEFAULT,
    AO2_CALLBACK_WITH_DATA,
};

ao2_container_insert

enum ao2_container_insert

Enumerator
AO2_CONTAINER_INSERT_NODE_INSERTED	The node was inserted into the container.
AO2_CONTAINER_INSERT_NODE_OBJ_REPLACED	The node object replaced an existing node object.
AO2_CONTAINER_INSERT_NODE_REJECTED	The node was rejected (duplicate).

Definition at line 50 of file astobj2_container_private.h.

                          {
    /*! The node was inserted into the container. */
    AO2_CONTAINER_INSERT_NODE_INSERTED,
    /*! The node object replaced an existing node object. */
    AO2_CONTAINER_INSERT_NODE_OBJ_REPLACED,
    /*! The node was rejected (duplicate). */
    AO2_CONTAINER_INSERT_NODE_REJECTED,
};

ao2_unlink_node_flags

enum ao2_unlink_node_flags

Enumerator
AO2_UNLINK_NODE_UNLINK_OBJECT	Remove the node from the object's weak link list OR unref the object if it's a strong reference.
AO2_UNLINK_NODE_NOUNREF_OBJECT	Modified unlink_object to skip the unref of the object.
AO2_UNLINK_NODE_UNREF_NODE	Unref the node.
AO2_UNLINK_NODE_DEC_COUNT	Decrement the container's element count.

Definition at line 33 of file astobj2_container_private.h.

                           {
    /*! Remove the node from the object's weak link list
     * OR unref the object if it's a strong reference. */
    AO2_UNLINK_NODE_UNLINK_OBJECT = (1 << 0),
    /*! Modified unlink_object to skip the unref of the object. */
    AO2_UNLINK_NODE_NOUNREF_OBJECT = (1 << 1),
    /*! Unref the node. */
    AO2_UNLINK_NODE_UNREF_NODE = (1 << 2),
    /*! Decrement the container's element count. */
    AO2_UNLINK_NODE_DEC_COUNT = (1 << 3),
};

Function Documentation

__container_unlink_node_debug()

int __container_unlink_node_debug	(	struct ao2_container_node *	node,
		uint32_t	flags,
		const char *	tag,
		const char *	file,
		int	line,
		const char *	func
	)

Definition at line 39 of file astobj2_container.c.

{
    struct ao2_container *container = node->my_container;
 
    if (container == NULL && (flags & AO2_UNLINK_NODE_DEC_COUNT)) {
        return 0;
    }
 
    if ((flags & AO2_UNLINK_NODE_UNLINK_OBJECT)
        && !(flags & AO2_UNLINK_NODE_NOUNREF_OBJECT)) {
        __ao2_ref(node->obj, -1, tag ?: "Remove obj from container", file, line, func);
    }
 
    node->obj = NULL;
 
    if (flags & AO2_UNLINK_NODE_DEC_COUNT) {
        ast_atomic_fetchadd_int(&container->elements, -1);
#if defined(AO2_DEBUG)
        {
            int empty = container->nodes - container->elements;
 
            if (container->max_empty_nodes < empty) {
                container->max_empty_nodes = empty;
            }
            if (container->v_table->unlink_stat) {
                container->v_table->unlink_stat(container, node);
            }
        }
#endif  /* defined(AO2_DEBUG) */
    }
 
    if (flags & AO2_UNLINK_NODE_UNREF_NODE) {
        /* Remove node from container */
        ao2_ref(node, -1);
    }
 
    return 1;
}

References __ao2_ref(), ao2_ref, AO2_UNLINK_NODE_DEC_COUNT, AO2_UNLINK_NODE_NOUNREF_OBJECT, AO2_UNLINK_NODE_UNLINK_OBJECT, AO2_UNLINK_NODE_UNREF_NODE, ast_atomic_fetchadd_int(), container, ao2_container::elements, NULL, and ao2_container::v_table.

Referenced by __ao2_iterator_next(), and internal_ao2_traverse().

container_destruct()

void container_destruct

(

void *

_c

)

Definition at line 635 of file astobj2_container.c.

{
    struct ao2_container *c = _c;
 
    /* Unlink any stored objects in the container. */
    c->destroying = 1;
    ao2_t_callback(c, OBJ_UNLINK | OBJ_NODATA | OBJ_MULTIPLE, NULL, NULL,
        "container_destruct called");
 
    /* Perform any extra container cleanup. */
    if (c->v_table && c->v_table->destroy) {
        c->v_table->destroy(c);
    }
 
#if defined(AO2_DEBUG)
    ast_atomic_fetchadd_int(&ao2.total_containers, -1);
#endif
}

References ao2_t_callback, ast_atomic_fetchadd_int(), c, NULL, OBJ_MULTIPLE, OBJ_NODATA, and OBJ_UNLINK.

Referenced by __ao2_container_alloc_hash(), and __ao2_container_alloc_rbtree().

container_init()

int container_init

(

void

)

Definition at line 1181 of file astobj2_container.c.

{
#if defined(AO2_DEBUG)
    reg_containers = ao2_t_container_alloc_list(AO2_ALLOC_OPT_LOCK_RWLOCK,
        AO2_CONTAINER_ALLOC_OPT_DUPS_REPLACE, ao2_reg_sort_cb, NULL,
        "Container registration container.");
    if (!reg_containers) {
        return -1;
    }
 
    ast_cli_register_multiple(cli_astobj2, ARRAY_LEN(cli_astobj2));
    ast_register_cleanup(container_cleanup);
#endif  /* defined(AO2_DEBUG) */
 
    return 0;
}

References AO2_ALLOC_OPT_LOCK_RWLOCK, AO2_CONTAINER_ALLOC_OPT_DUPS_REPLACE, ao2_t_container_alloc_list, ARRAY_LEN, ast_cli_register_multiple, ast_register_cleanup(), and NULL.

Referenced by astobj2_init().