TLSF-based malloc.

TLSF-based global memory allocator. More...

Detailed Description

TLSF-based global memory allocator.

This is a malloc/free implementation built on top of the TLSF allocator. It defines a global tlsf_control block and performs allocations on that block. This implementation replaces the system malloc

Additionally, the calls to TLSF are wrapped in irq_disable()/irq_restore(), to make it thread-safe.

If this module is used as the system memory allocator, then the global memory control block should be initialized as the first thing before the stdlib is used. Boards should use tlsf_add_global_pool() at startup to add all the memory regions they want to make available for dynamic allocation via malloc().

Files
file	tlsf-malloc.h
	TLSF-based global memory allocator.
file	tlsf-malloc-internal.h

Data Structures
struct	tlsf_size_container_t
	Struct to hold the total sizes of free and used blocks Used for tlsf_size_walker() More...

Functions
void	tlsf_size_walker (void *ptr, size_t size, int used, void *user)
	Walk the memory pool to print all block sizes and to calculate the total amount of free and used block sizes.
int	tlsf_add_global_pool (void *mem, size_t bytes)
	Add an area of memory to the global allocator pool.
tlsf_t	_tlsf_get_global_control (void)
	Get a pointer to the global tlsf_control block.

Function Documentation

_tlsf_get_global_control()

tlsf_t _tlsf_get_global_control

(

void

)

Get a pointer to the global tlsf_control block.

Use for debugging purposes only.

tlsf_add_global_pool()

int tlsf_add_global_pool	(	void *	mem,
		size_t	bytes
	)

Add an area of memory to the global allocator pool.

The first time this function is called, it will automatically perform a tlsf_create() on the global tlsf_control block.

Warning

If this module is used, then this function MUST be called at least once, before any allocations take place.

Parameters

mem	Pointer to memory area. Should be aligned to 4 bytes.
bytes	Size in bytes of the memory area.

Returns

0 on success, nonzero on failure.

tlsf_size_walker()

void tlsf_size_walker	(	void *	ptr,
		size_t	size,
		int	used,
		void *	user
	)

Walk the memory pool to print all block sizes and to calculate the total amount of free and used block sizes.

Note

This function is passed to tlsf_walk_pool()

Parameters

ptr	Pointer to the current block.
size	Size of the current block at ptr.
used	Shows whether the current block is used or free.
user	Custom data expected to be of type pointer to tlsf_size_container_t