Net stack with AutoIP enabled
Dependencies:
mbed
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memp.c File Reference
Dynamic pool memory manager.
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Go to the source code of this file.
Functions
static int memp_sanity (void)
Check that memp-lists don't form a circle.
static void memp_overflow_check_element (struct memp *p, u16_t memp_size)
Check if a memp element was victim of an overflow (e.g.
static void memp_overflow_check_all (void)
Do an overflow check for all elements in every pool.
static void memp_overflow_init (void)
Initialize the restricted areas of all memp elements in every pool.
void memp_init (void)
Initialize this module.
void * memp_malloc (memp_t type) memp_malloc_fn(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.
static const char * memp_desc [MEMP_MAX]
This array holds a textual description of each pool.
static u8_t *const memp_bases []
This array holds the base of each memory pool.
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 .
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 382 of file memp.c .
Initialize this module.
Carves out memp_memory into linked lists for each pool-type.
Definition at line 285 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
memp_overflow_check_all
(
void
)
[static]
static void memp_overflow_check_element
(
struct memp *
p ,
u16_t
memp_size
)
[static]
Check if a memp element was victim of an overflow (e.g.
the restricted area after it has been altered)
Parameters:
p the memp element to check
memp_size the element size of the pool p comes from
Definition at line 208 of file memp.c .
static void memp_overflow_init
(
void
)
[static]
Initialize the restricted areas of all memp elements in every pool.
Definition at line 255 of file memp.c .
static int memp_sanity
(
void
)
[static]
Check that memp-lists don't form a circle.
Definition at line 181 of file memp.c .
Variable Documentation
u8_t memp_memory [MEM_ALIGNMENT - 1 #define LWIP_MEMPOOL(name,num,size,desc) + ( (num) * (MEMP_SIZE + MEMP_ALIGN_SIZE(size) ) )#include "lwip/memp_std.h"] MEM_POSITION [static]
This array holds the first free element of each pool.
This is the actual memory used by the pools (all pools in one big block).
Elements form a linked list.
Definition at line 116 of file memp.c .
Initial value: {
#define LWIP_MEMPOOL(name,num,size,desc) memp_memory_ ## name ## _base,
#include "lwip/memp_std.h"
} MEM_POSITION
This array holds the base of each memory pool.
Definition at line 161 of file memp.c .
Initial value: {
#define LWIP_MEMPOOL(name,num,size,desc) (desc),
#include "lwip/memp_std.h"
}
This array holds a textual description of each pool.
Definition at line 143 of file memp.c .
Initial value: {
#define LWIP_MEMPOOL(name,num,size,desc) (num),
#include "lwip/memp_std.h"
}
This array holds the number of elements in each pool.
Definition at line 136 of file memp.c .
Initial value: {
#define LWIP_MEMPOOL(name,num,size,desc) LWIP_MEM_ALIGN_SIZE(size),
#include "lwip/memp_std.h"
}
This array holds the element sizes of each pool.
Definition at line 128 of file memp.c .