Callback multiplexer

cb_mux provides utilities for storing, retrieving, and managing callback information in a singly linked list. More...

Detailed Description

cb_mux provides utilities for storing, retrieving, and managing callback information in a singly linked list.

If an API provides the ability to call multiple callbacks, cb_mux can simplify handling of an arbitrary number of callbacks by requiring memory for a cb_mux entry to be passed along with other arguments. The cb_mux entry is then attached to a list using cb_mux_add. The code implementing that API can manage the list using the various utility functions that cb_mux provides.

Files
file	cb_mux.h
	cb_mux interface definitions

Data Structures
struct	cb_mux
	cb_mux list entry structure More...

Typedefs
typedef unsigned int	cb_mux_cbid_t
	cb_mux identifier type
typedef void(*	cb_mux_cb_t) (void *)
	cb_mux callback type
typedef struct cb_mux	cb_mux_t
	cb_mux list entry structure
typedef void(*	cb_mux_iter_t) (cb_mux_t *, void *)
	cb_mux iterate function callback type for cb_mux_iter

Functions
void	cb_mux_add (cb_mux_t **head, cb_mux_t *entry)
	Add a new entry to the end of a cb_mux list. More...
void	cb_mux_del (cb_mux_t **head, cb_mux_t *entry)
	Remove a entry from a cb_mux list. More...
cb_mux_t *	cb_mux_find_cbid (cb_mux_t *head, cb_mux_cbid_t cbid_val)
	Find an entry in the list by ID. More...
cb_mux_t *	cb_mux_find_low (cb_mux_t *head)
	Find the entry with the lowest ID. More...
cb_mux_t *	cb_mux_find_high (cb_mux_t *head)
	Find the entry with the highest ID. More...
cb_mux_cbid_t	cb_mux_find_free_id (cb_mux_t *head)
	Find the lowest unused ID. More...
void	cb_mux_iter (cb_mux_t *head, cb_mux_iter_t func, void *arg)
	Run a function on every item in the cb_mux list. More...

Function Documentation

cb_mux_add()

void cb_mux_add	(	cb_mux_t **	head,
		cb_mux_t *	entry
	)

Add a new entry to the end of a cb_mux list.

Parameters

[in]	head	double pointer to first list entry
[in]	entry	entry to add

cb_mux_del()

void cb_mux_del	(	cb_mux_t **	head,
		cb_mux_t *	entry
	)

Remove a entry from a cb_mux list.

Parameters

[in]	head	double pointer to first list entry
[in]	entry	entry to remove

cb_mux_find_cbid()

cb_mux_t* cb_mux_find_cbid	(	cb_mux_t *	head,
		cb_mux_cbid_t	cbid_val
	)

Find an entry in the list by ID.

Parameters

[in]	head	pointer to first list entry
[in]	cbid_val	ID to find

Returns

pointer to the list entry

cb_mux_find_free_id()

cb_mux_cbid_t cb_mux_find_free_id

(

cb_mux_t *

head

)

Find the lowest unused ID.

Returns highest possible ID on failure

Parameters

[in]

head

pointer to first list entry

Returns

lowest unused ID

cb_mux_find_high()

cb_mux_t* cb_mux_find_high

(

cb_mux_t *

head

)

Find the entry with the highest ID.

If there are multiple hits, this returns the oldest.

Parameters

[in]

head

pointer to first list entry

Returns

pointer to the list entry

cb_mux_find_low()

cb_mux_t* cb_mux_find_low

(

cb_mux_t *

head

)

Find the entry with the lowest ID.

If there are multiple hits, this returns the oldest.

Parameters

[in]

head

pointer to first list entry

Returns

pointer to the list entry

cb_mux_iter()

void cb_mux_iter	(	cb_mux_t *	head,
		cb_mux_iter_t	func,
		void *	arg
	)

Run a function on every item in the cb_mux list.

Parameters

[in]	head	pointer to first list entry
[in]	func	function to run on each entry
[in]	arg	argument for the function