memp.c File Reference

#include "net/opt.h"
#include "net/memp.h"
#include "net/sys.h"
#include "net/stats.h"
#include <string.h>
#include "net/pbuf.h"
#include "net/raw.h"
#include "net/udp.h"
#include "net/tcp.h"
#include "net/priv/tcp_priv.h"
#include "net/ip4_frag.h"
#include "net/netbuf.h"
#include "net/api.h"
#include "net/priv/tcpip_priv.h"
#include "net/priv/api_msg.h"
#include "net/sockets.h"
#include "net/netifapi.h"
#include "net/etharp.h"
#include "net/igmp.h"
#include "net/timeouts.h"
#include "netif/ppp/ppp_opts.h"
#include "net/netdb.h"
#include "net/dns.h"
#include "net/priv/nd6_priv.h"
#include "net/ip6_frag.h"
#include "net/mld6.h"
#include "net/priv/memp_std.h"

Include dependency graph for memp.c:

Go to the source code of this file.

Macros
#define	LWIP_MEMPOOL(name, num, size, desc)   LWIP_MEMPOOL_DECLARE(name,num,size,desc)
#define	LWIP_MEMPOOL(name, num, size, desc)   &memp_ ## name,

Functions
void	memp_free (memp_t type, void *mem)
void	memp_free_pool (const struct memp_desc *desc, void *mem)
void	memp_init (void)
void	memp_init_pool (const struct memp_desc *desc)
void *	memp_malloc (memp_t type)
void *	memp_malloc_pool (const struct memp_desc *desc)

Variables
const struct memp_desc *const	memp_pools [MEMP_MAX]

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 [1/2]

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

Definition at line 78 of file memp.c.

LWIP_MEMPOOL [2/2]

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

Definition at line 78 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 469 of file memp.c.

References LWIP_ERROR, MEMP_MAX, memp_pools, NULL, and memp_desc::tab.

Referenced by pbuf_free(), and tcpip_callbackmsg_delete().

memp_free_pool()

void memp_free_pool	(	const struct memp_desc *	desc,
		void *	mem
	)

Put a custom pool element back into its pool.

Parameters

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

Definition at line 452 of file memp.c.

References LWIP_ASSERT, and NULL.

memp_init()

void memp_init

(

void

)

Initializes lwIP built-in pools. Related functions: memp_malloc, memp_free

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

Definition at line 271 of file memp.c.

References LWIP_ARRAYSIZE, memp_init_pool(), and memp_pools.

Referenced by lwip_init().

Here is the call graph for this function:

memp_init_pool()

void memp_init_pool

(

const struct memp_desc *

desc

)

Initialize custom memory pool. Related functions: memp_malloc_pool, memp_free_pool

Parameters

desc	pool to initialize

Definition at line 230 of file memp.c.

References memp_desc::base, LWIP_MEM_ALIGN, LWIP_UNUSED_ARG, MEMP_OVERFLOW_CHECK, MEMP_SIZE, memp::next, NULL, memp_desc::num, memp_desc::size, and memp_desc::tab.

Referenced by memp_init().

memp_malloc()

void* memp_malloc

(

memp_t

type

)

Get an element from a specific pool.

Parameters

type	the pool to get an element from

Returns

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

Definition at line 385 of file memp.c.

References LWIP_ERROR, MEMP_MAX, and NULL.

Referenced by pbuf_alloc(), and tcpip_callbackmsg_new().

memp_malloc_pool()

void* memp_malloc_pool

(

const struct memp_desc *

desc

)

Get an element from a custom pool.

Parameters

desc	the pool to get an element from

Returns

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

Definition at line 359 of file memp.c.

References LWIP_ASSERT, and NULL.

Variable Documentation

memp_pools

const struct memp_desc* const memp_pools[MEMP_MAX]

Initial value:

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

Definition at line 81 of file memp.c.

Referenced by memp_free(), and memp_init().