Helper APIs to create heaps and pools and allocate/free buffers from those pools or heaps. More...

Data Structures
struct	wiced_bt_pool_statistics_s
	AIROC Bluetooth buffer pool statistics. More...

struct	wiced_bt_heap_statistics_s
	AIROC Bluetooth heap statistics. More...

struct	wiced_bt_buffer_q_t
	This queue is a general purpose buffer queue, for application use. More...

Macros
#define	wiced_bt_buffer_pool_t wiced_bt_pool_t

#define	WICED_DEFAULT_HEAP ((wiced_bt_heap_t *)NULL)
	If an application wants to get a buffer from the default heap, he can use this. More...

#define	wiced_bt_get_buffer(size) wiced_bt_get_buffer_from_heap(WICED_DEFAULT_HEAP, (size))
	Allocates a buffer from the DEFAULT heap . More...

#define	wiced_memory_allocate(size) wiced_bt_get_buffer(size)
	Function wiced_memory_allocate. More...

#define	wiced_memory_free(memoryBlock) wiced_bt_free_buffer(memoryBlock)
	Function wiced_memory_free. More...

Typedefs
typedef void	wiced_bt_buffer_t
	AIROC Bluetooth Buffer.

typedef struct t_wiced_bt_pool	wiced_bt_pool_t
	AIROC Bluetooth Pool.

typedef struct t_wiced_bt_heap	wiced_bt_heap_t
	AIROC Bluetooth Heap.

typedef struct wiced_bt_pool_statistics_s	wiced_bt_pool_statistics_t
	AIROC Bluetooth buffer pool statistics.

typedef struct wiced_bt_heap_statistics_s	wiced_bt_heap_statistics_t
	AIROC Bluetooth heap statistics.

Functions
uint32_t	wiced_memory_get_free_bytes (void)
	Returns the number of free bytes of RAM left. More...

wiced_bt_heap_t *	wiced_bt_create_heap (const char name, void p_area, int size, wiced_bt_lock_t *p_lock, wiced_bool_t b_make_default)
	Initializes dynamic memory area. More...

void	wiced_bt_delete_heap (wiced_bt_heap_t *p_heap)
	Deletes the heap created with wiced_bt_create_heap. More...

wiced_bt_pool_t *	wiced_bt_create_pool (const char name, uint32_t buffer_size, uint32_t buffer_cnt, wiced_bt_lock_t p_lock)
	Creates a buffer pool for application usage. More...

void	wiced_bt_delete_pool (wiced_bt_pool_t *p_pool)
	Deletes a buffer pool created using wiced_bt_create_pool. More...

wiced_bt_buffer_t *	wiced_bt_get_buffer_from_pool (wiced_bt_pool_t *p_pool)
	Get buffer from requested pool. More...

wiced_bt_buffer_t *	wiced_bt_get_buffer_from_heap (wiced_bt_heap_t *p_heap, uint32_t size)
	Allocates a buffer from the requested heap. More...

uint32_t	wiced_bt_get_pool_free_count (wiced_bt_pool_t *p_pool)
	To get the number of buffers available in the pool. More...

uint32_t	wiced_bt_get_largest_heap_buffer (wiced_bt_heap_t *p_heap)
	To get the size of the largest buffer available in the heap. More...

void	wiced_bt_free_buffer (wiced_bt_buffer_t *p_buf)
	Frees a buffer back to the pool or heap it came from. More...

uint32_t	wiced_bt_get_buffer_size (wiced_bt_buffer_t *p_buf)
	Gets the buffer size. More...

void	wiced_bt_init_q (wiced_bt_buffer_q_t p_q, wiced_bt_lock_t p_lock)
	Called by an application to initialize a AIROC buffer queue. More...

void	wiced_bt_enqueue (wiced_bt_buffer_q_t p_q, wiced_bt_buffer_t p_buf)
	Enqueue a buffer at the tail of the queue. More...

void	wiced_bt_enqueue_head (wiced_bt_buffer_q_t p_q, wiced_bt_buffer_t p_buf)
	Enqueue a buffer at the head of the queue. More...

wiced_bt_buffer_t *	wiced_bt_dequeue (wiced_bt_buffer_q_t *p_q)
	Dequeues a buffer from the head of a queue. More...

wiced_bt_buffer_t *	wiced_bt_remove_from_queue (wiced_bt_buffer_q_t p_q, wiced_bt_buffer_t p_buf)
	Dequeue a buffer from the middle of the queue. More...

wiced_bt_buffer_t *	wiced_bt_getfirst (wiced_bt_buffer_q_t *p_q)
	Return a pointer to the first buffer in a queue. More...

wiced_bt_buffer_t *	wiced_bt_getlast (wiced_bt_buffer_q_t *p_q)
	Return a pointer to the last buffer in a queue. More...

wiced_bt_buffer_t *	wiced_bt_getnext (wiced_bt_buffer_t *p_buf)
	Return a pointer to the next buffer in a queue. More...

uint32_t	wiced_bt_queue_is_empty (wiced_bt_buffer_q_t *p_q)
	Check the status of a queue. More...

uint32_t	wiced_bt_queue_get_count (wiced_bt_buffer_q_t *p_q)
	Get the number of items in the queue. More...

wiced_bt_buffer_t *	wiced_memory_alloc_long_term_mem_block (int size, const char *block_name)
	Allocate long term memory, typically used for control blocks allocated through config, not expected to be freed during the lifetime of the application. More...

void	wiced_memory_free_long_term_mem_block (wiced_bt_buffer_t *p_mem)
	Free long term memory, used to free memory allocated with wiced_memory_allocate_long_term, typically called during application shutdown. More...

wiced_bool_t	wiced_bt_get_heap_statistics (void p_heap, wiced_bt_heap_statistics_t p_stats)
	Get/Print the heap stats. More...

void	wiced_set_exception_callback (pf_wiced_exception pf_handler)
	Set the exception callback. More...

Detailed Description

Helper APIs to create heaps and pools and allocate/free buffers from those pools or heaps.

When a heap or a pool is created, this utility allocates required chunk of memory from the system and manages it for the creator.

Macro Definition Documentation

#define wiced_bt_get_buffer ( size ) wiced_bt_get_buffer_from_heap(WICED_DEFAULT_HEAP, (size))

Allocates a buffer from the DEFAULT heap .

Parameters

[in] size : size to be allocated

Returns: the pointer to the buffer or NULL on failure

#define WICED_DEFAULT_HEAP ((wiced_bt_heap_t *)NULL)

If an application wants to get a buffer from the default heap, he can use this.

#define wiced_memory_allocate ( size ) wiced_bt_get_buffer(size)

Function wiced_memory_allocate.

Allocates memory from Dynamic Memory pools

Parameters

[in] size :size of the memory to be allocated

Returns: pointer to the allocated memory on success NULL on failure

#define wiced_memory_free ( memoryBlock ) wiced_bt_free_buffer(memoryBlock)

Function wiced_memory_free.

Frees the buffer

Parameters

[in] p_buf : free memory allocated from Dynamic Memory pools

Returns: None

Function Documentation

wiced_bt_heap_t* wiced_bt_create_heap	(	const char *	name,
		void *	p_area,
		int	size,
		wiced_bt_lock_t *	p_lock,
		wiced_bool_t	b_make_default
	)

Initializes dynamic memory area.

Application reserves an area for dynamic variable memory allocations with this call. Application can now allocate variable sized buffers as against fixed sized buffer allocations from the pools initialized with calls to wiced_bt_create_pool and allocated using wiced_bt_get_buffer_from_pool.

Parameters

[in]	name	: Friendly name of the heap
[in]	p_area	: Pointer to area to use for the heap. If NULL, AIROC will allocate the area.
[in]	size	: Size the area passed in. If no area passed in, this is the size of the heap desired.
[in]	p_lock	: Pointers to lock functions to use during heap manipulation. If NULL, then it is assumed that the application handles disabling of preemption.
[in]	b_make_default	Flag as to whether the heap will be the default heap.

Returns: wiced_bt_heap_t * - pointer to heap, or NULL if the heap creation failed.

wiced_bt_pool_t* wiced_bt_create_pool	(	const char *	name,
		uint32_t	buffer_size,
		uint32_t	buffer_cnt,
		wiced_bt_lock_t *	p_lock
	)

Creates a buffer pool for application usage.

Parameters

[in]	name	: Friendly name of the heap
[in]	buffer_size	Size of the buffers in the pool
[in]	buffer_cnt	: Number of buffers in the pool
[in]	p_lock	: Pointers to lock functions to use during heap manipulation. If NULL, then it is assumed that the application handles disabling of preemption.

Returns: pointer to the created pool on success, or NULL on failure

void wiced_bt_delete_heap ( wiced_bt_heap_t * p_heap )

Deletes the heap created with wiced_bt_create_heap.

The heap area is freed back to the platform in case the wiced_bt_create_heap was called with p_area set to NULL.

Parameters

[in] p_heap : Heap created with wiced_bt_create_heap

Returns: void

void wiced_bt_delete_pool ( wiced_bt_pool_t * p_pool )

Deletes a buffer pool created using wiced_bt_create_pool.

Parameters

[in] p_pool : pointer of type wiced_bt_pool_t returned through a call to wiced_bt_create_pool

Returns: void

wiced_bt_buffer_t* wiced_bt_dequeue ( wiced_bt_buffer_q_t * p_q )

Dequeues a buffer from the head of a queue.

Parameters

[in] p_q : pointer to a queue.

Returns: NULL if queue is empty, else buffer

void wiced_bt_enqueue	(	wiced_bt_buffer_q_t *	p_q,
		wiced_bt_buffer_t *	p_buf
	)

Enqueue a buffer at the tail of the queue.

Parameters

[in]	p_q	: pointer to a queue.
[in]	p_buf	: address of the buffer to enqueue

Returns: void

void wiced_bt_enqueue_head	(	wiced_bt_buffer_q_t *	p_q,
		wiced_bt_buffer_t *	p_buf
	)

Enqueue a buffer at the head of the queue.

Parameters

[in]	p_q	: pointer to a queue.
[in]	p_buf	: address of the buffer to enqueue

Returns: void

void wiced_bt_free_buffer ( wiced_bt_buffer_t * p_buf )

Frees a buffer back to the pool or heap it came from.

Parameters

[in] p_buf : pointer to the start of the (pool/heap) buffer to be freed

Returns: None

wiced_bt_buffer_t* wiced_bt_get_buffer_from_heap	(	wiced_bt_heap_t *	p_heap,
		uint32_t	size
	)

Allocates a buffer from the requested heap.

Parameters

[in]	p_heap	: pointer to heap from which to get the buffer
[in]	size	: size to be allocated

Returns: the pointer to the buffer or NULL on failure

wiced_bt_buffer_t* wiced_bt_get_buffer_from_pool ( wiced_bt_pool_t * p_pool )

Get buffer from requested pool.

Allocates a buffer from the requested pool.

Parameters

[in] p_pool : pointer to pool from which to get the buffer

Returns: the pointer to the buffer or NULL on failure

uint32_t wiced_bt_get_buffer_size ( wiced_bt_buffer_t * p_buf )

Gets the buffer size.

Parameters

[in] p_buf : pointer to the start of the buffer

Returns: the buffer size

wiced_bool_t wiced_bt_get_heap_statistics	(	void *	p_heap,
		wiced_bt_heap_statistics_t *	p_stats
	)

Get/Print the heap stats.

Parameters

[in]	p_heap	: heap pointer (output of wiced_bt_create_heap)
[out]	p_stats	: pointer to receive the heap statistics

Returns: TRUE in case of valid stats returned in p_stats

uint32_t wiced_bt_get_largest_heap_buffer ( wiced_bt_heap_t * p_heap )

To get the size of the largest buffer available in the heap.

Parameters

[in] p_heap : heap pointer

Returns: the size of the largest buffer available in the heap

uint32_t wiced_bt_get_pool_free_count ( wiced_bt_pool_t * p_pool )

To get the number of buffers available in the pool.

Parameters

[in] p_pool : pool pointer

Returns: the number of buffers available in the pool

wiced_bt_buffer_t* wiced_bt_getfirst ( wiced_bt_buffer_q_t * p_q )

Return a pointer to the first buffer in a queue.

Parameters

[in] p_q : pointer to a queue.

Returns: NULL if queue is empty, else buffer address

wiced_bt_buffer_t* wiced_bt_getlast ( wiced_bt_buffer_q_t * p_q )

Return a pointer to the last buffer in a queue.

Parameters

[in] p_q : pointer to a queue.

Returns: NULL if queue is empty, else buffer address

wiced_bt_buffer_t* wiced_bt_getnext ( wiced_bt_buffer_t * p_buf )

Return a pointer to the next buffer in a queue.

Parameters

[in] p_buf : pointer to the buffer to find the next one from.

Returns: NULL if no more buffers in the queue, else next buffer address

void wiced_bt_init_q	(	wiced_bt_buffer_q_t *	p_q,
		wiced_bt_lock_t *	p_lock
	)

Called by an application to initialize a AIROC buffer queue.

Pointers to lock and unlock functions may be NULL if application has handled preemption outside of the queue management code.

Returns: void

uint32_t wiced_bt_queue_get_count ( wiced_bt_buffer_q_t * p_q )

Get the number of items in the queue.

Parameters

[in] p_q : pointer to a queue.

Returns: number of items in the queue

uint32_t wiced_bt_queue_is_empty ( wiced_bt_buffer_q_t * p_q )

Check the status of a queue.

Parameters

[in] p_q : pointer to a queue.

Returns: TRUE if queue is empty, else FALSE

wiced_bt_buffer_t* wiced_bt_remove_from_queue	(	wiced_bt_buffer_q_t *	p_q,
		wiced_bt_buffer_t *	p_buf
	)

Dequeue a buffer from the middle of the queue.

Parameters

[in]	p_q	: pointer to a queue.
[in]	p_buf	: address of the buffer to dequeue

Returns: NULL if queue is empty, else buffer

wiced_bt_buffer_t* wiced_memory_alloc_long_term_mem_block	(	int	size,
		const char *	block_name
	)

Allocate long term memory, typically used for control blocks allocated through config, not expected to be freed during the lifetime of the application.

Parameters

[in] size : size of memory to be allocated

Returns: pointer to the allocated memory

void wiced_memory_free_long_term_mem_block ( wiced_bt_buffer_t * p_mem )

Free long term memory, used to free memory allocated with wiced_memory_allocate_long_term, typically called during application shutdown.

Parameters

[in] p_mem : pointer memory to be freed

Returns: none

uint32_t wiced_memory_get_free_bytes ( void )

Returns the number of free bytes of RAM left.

Returns: the number of free bytes of RAM left

void wiced_set_exception_callback ( pf_wiced_exception pf_handler )

Set the exception callback.

Parameters

[in] pf_handler : Exception callback function

Returns: void


			AIROC^™ BTSDK v4.2 - Documentation

Data Structures

Macros

Typedefs

Functions

Detailed Description

Macro Definition Documentation

Function Documentation