memp.c File Reference

Dynamic pool memory manager. More...

Go to the source code of this file.

Functions
void	memp_init (void)
	Initialize this module.
void *	memp_malloc (memp_t type)
	Get an element from a specific pool.
void	memp_free (memp_t type, void *mem)
	Put an element back into its pool.
Variables
static struct memp *memp_tab[MEMP_MAX]	MEM_POSITION
	This array holds the first free element of each pool.
static const u16_t	memp_sizes [MEMP_MAX]
	This array holds the element sizes of each pool.
static const u16_t	memp_num [MEMP_MAX]
	This array holds the number of elements in each pool.

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Detailed Description

Dynamic pool memory manager.

lwIP has dedicated pools for many structures (netconn, protocol control blocks, packet buffers, ...). All these pools are managed here.

Definition in file memp.c.

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Function Documentation

void memp_free	(	memp_t	type,
		void *	mem
	)

Put an element back into its pool.

Parameters:

type	the pool where to put mem
mem	the memp element to free

Definition at line 434 of file memp.c.

void memp_init

(

void

)

Initialize this module.

Carves out memp_memory into linked lists for each pool-type.

Definition at line 337 of file memp.c.

void* memp_malloc

(

memp_t

type )

Get an element from a specific pool.

Parameters:

type	the pool to get an element from

the debug version has two more parameters:

Parameters:

file	file name calling this function
line	number of line where this function is called

Returns:

a pointer to the allocated memory or a NULL pointer on error

Definition at line 389 of file memp.c.

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Variable Documentation

u8_t memp_memory [MEM_ALIGNMENT - 1 #define LWIP_MEMPOOL(name,num,size,desc) ] MEM_POSITION [static]

This array holds the first free element of each pool.

This array holds a textual description of each pool.

Elements form a linked list.

This is the actual memory used by the pools (all pools in one big block).

Definition at line 117 of file memp.c.

const u16_t memp_num[MEMP_MAX] [static]

Initial value:

 {
#define LWIP_MEMPOOL(name,num,size,desc)  

}

This array holds the number of elements in each pool.

Definition at line 137 of file memp.c.

const u16_t memp_sizes[MEMP_MAX] [static]

Initial value:

 {
#define LWIP_MEMPOOL(name,num,size,desc)  

}

This array holds the element sizes of each pool.

Definition at line 129 of file memp.c.