- Generated by
1.18.0
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sdk-core v2026.11.05
PS2 SDK - core tier (build-critical EE/IOP modules)
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#include "lwip/opt.h"#include "lwip/mem.h"#include "lwip/def.h"#include "lwip/sys.h"#include "lwip/stats.h"#include "lwip/err.h"#include <stdio.h>#include <string.h>Go to the source code of this file.
Classes | |
| struct | mem |
Macros | |
| #define | LWIP_MEM_ILLEGAL_FREE(msg) |
| #define | MEM_STATS_INC_LOCKED(x) |
| #define | MEM_STATS_INC_USED_LOCKED(x, y) |
| #define | MEM_STATS_DEC_USED_LOCKED(x, y) |
| #define | MEM_SANITY_OFFSET 0 |
| #define | MEM_SANITY_OVERHEAD 0 |
| #define | MIN_SIZE 12 |
| #define | MIN_SIZE_ALIGNED LWIP_MEM_ALIGN_SIZE(MIN_SIZE) |
| #define | SIZEOF_STRUCT_MEM LWIP_MEM_ALIGN_SIZE(sizeof(struct mem)) |
| #define | MEM_SIZE_ALIGNED LWIP_MEM_ALIGN_SIZE(MEM_SIZE) |
| #define | LWIP_RAM_HEAP_POINTER ram_heap |
| #define | LWIP_MEM_FREE_DECL_PROTECT() |
| #define | LWIP_MEM_FREE_PROTECT() |
| #define | LWIP_MEM_FREE_UNPROTECT() |
| #define | LWIP_MEM_ALLOC_DECL_PROTECT() |
| #define | LWIP_MEM_ALLOC_PROTECT() |
| #define | LWIP_MEM_ALLOC_UNPROTECT() |
| #define | LWIP_MEM_LFREE_VOLATILE |
| #define | MEM_SANITY() |
| #define | mem_overflow_init_element(mem, size) |
| #define | mem_overflow_check_element(mem) |
Functions | |
| LWIP_DECLARE_MEMORY_ALIGNED (ram_heap, MEM_SIZE_ALIGNED+(2U *SIZEOF_STRUCT_MEM)) | |
| void | mem_init (void) |
| void | mem_free (void *rmem) |
| void * | mem_trim (void *rmem, mem_size_t new_size) |
| void * | mem_malloc (mem_size_t size_in) |
| void * | mem_calloc (mem_size_t count, mem_size_t size) |
Dynamic memory manager
This is a lightweight replacement for the standard C library malloc().
If you want to use the standard C library malloc() instead, define MEM_LIBC_MALLOC to 1 in your lwipopts.h
To let mem_malloc() use pools (prevents fragmentation and is much faster than a heap but might waste some memory), define MEM_USE_POOLS to 1, define MEMP_USE_CUSTOM_POOLS to 1 and create a file "lwippools.h" that includes a list of pools like this (more pools can be added between _START and _END):
Define three pools with sizes 256, 512, and 1512 bytes LWIP_MALLOC_MEMPOOL_START LWIP_MALLOC_MEMPOOL(20, 256) LWIP_MALLOC_MEMPOOL(10, 512) LWIP_MALLOC_MEMPOOL(5, 1512) LWIP_MALLOC_MEMPOOL_END
Definition in file mem.c.
| #define LWIP_MEM_FREE_PROTECT | ( | ) |
| #define LWIP_MEM_FREE_UNPROTECT | ( | ) |
| #define MEM_SIZE_ALIGNED LWIP_MEM_ALIGN_SIZE(MEM_SIZE) |
| #define MEM_STATS_DEC_USED_LOCKED | ( | x, | |
| y ) |
| #define MEM_STATS_INC_LOCKED | ( | x | ) |
| #define MEM_STATS_INC_USED_LOCKED | ( | x, | |
| y ) |
| #define MIN_SIZE 12 |
| #define MIN_SIZE_ALIGNED LWIP_MEM_ALIGN_SIZE(MIN_SIZE) |
| #define SIZEOF_STRUCT_MEM LWIP_MEM_ALIGN_SIZE(sizeof(struct mem)) |
| LWIP_DECLARE_MEMORY_ALIGNED | ( | ram_heap | , |
| MEM_SIZE_ALIGNED+ | 2U *SIZEOF_STRUCT_MEM ) |
If you want to relocate the heap to external memory, simply define LWIP_RAM_HEAP_POINTER as a void-pointer to that location. If so, make sure the memory at that location is big enough (see below on how that space is calculated). the heap. we need one struct mem at the end and some room for alignment
| void * mem_calloc | ( | mem_size_t | count, |
| mem_size_t | size ) |
Contiguously allocates enough space for count objects that are size bytes of memory each and returns a pointer to the allocated memory.
The allocated memory is filled with bytes of value zero.
| count | number of objects to allocate |
| size | size of the objects to allocate |
| void mem_free | ( | void * | rmem | ) |
Put a struct mem back on the heap
| rmem | is the data portion of a struct mem as returned by a previous call to mem_malloc() |
| void mem_init | ( | void | ) |
| void * mem_malloc | ( | mem_size_t | size_in | ) |
Allocate a block of memory with a minimum of 'size' bytes.
| size_in | is the minimum size of the requested block in bytes. |
Note that the returned value will always be aligned (as defined by MEM_ALIGNMENT).
| void * mem_trim | ( | void * | rmem, |
| mem_size_t | new_size ) |
Shrink memory returned by mem_malloc().
| rmem | pointer to memory allocated by mem_malloc the is to be shrunk |
| new_size | required size after shrinking (needs to be smaller than or equal to the previous size) |
1.18.0