memp.c File Reference

#include "lwip/opt.h"
#include "lwip/memp.h"
#include "lwip/pbuf.h"
#include "lwip/udp.h"
#include "lwip/raw.h"
#include "lwip/tcp_impl.h"
#include "lwip/igmp.h"
#include "lwip/api.h"
#include "lwip/api_msg.h"
#include "lwip/tcpip.h"
#include "lwip/sys.h"
#include "lwip/timers.h"
#include "lwip/stats.h"
#include "netif/etharp.h"
#include "lwip/ip_frag.h"
#include "lwip/snmp_structs.h"
#include "lwip/snmp_msg.h"
#include "lwip/dns.h"
#include "netif/ppp_oe.h"
#include <string.h>
#include "lwip/memp_std.h"

Include dependency graph for memp.c:

Go to the source code of this file.

Data Structures
struct	memp

Macros
#define	MEMP_SIZE   0
#define	MEMP_ALIGN_SIZE(x)   (LWIP_MEM_ALIGN_SIZE(x))
#define	LWIP_MEMPOOL(name, num, size, desc)   LWIP_MEM_ALIGN_SIZE(size),
#define	LWIP_MEMPOOL(name, num, size, desc)   (num),
#define	LWIP_MEMPOOL(name, num, size, desc)   + ( (num) * (MEMP_SIZE + MEMP_ALIGN_SIZE(size) ) )

Functions
void	memp_init (void)
void *	memp_malloc (memp_t type)
void	memp_free (memp_t type, void *mem)

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.

Macro Definition Documentation

LWIP_MEMPOOL [1/3]

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

LWIP_MEMPOOL [2/3]

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

LWIP_MEMPOOL [3/3]

#define LWIP_MEMPOOL	(		name,
			num,
			size,
			desc
	)		+ ( (num) * (MEMP_SIZE + MEMP_ALIGN_SIZE(size) ) )

MEMP_ALIGN_SIZE

#define MEMP_ALIGN_SIZE

(

x

)

(LWIP_MEM_ALIGN_SIZE(x))

Definition at line 111 of file memp.c.

MEMP_SIZE

#define MEMP_SIZE   0

Definition at line 110 of file memp.c.

Function Documentation

memp_free()

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 435 of file memp.c.

memp_init()

void memp_init

(

void

)

Initialize this module.

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

Definition at line 338 of file memp.c.

memp_malloc()

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 390 of file memp.c.