KE_MEM
[KERNEL]

Heap management module. More...

Collaboration diagram for KE_MEM:

Data Structures
struct	mblock_free
	Free memory block delimiter structure (size must be word multiple). More...
struct	mblock_used
	Used memory block delimiter structure (size must be word multiple). More...
Defines
#define	KE_HEAP_SIZE NX_HEAP_SIZE
	Heap size for nX.
Functions
struct mblock_free *	ke_mem_init (void)
	Heap initialization.
void *	ke_malloc (uint32_t size)
	Allocation of a block of memory.
void	ke_free (void *mem_ptr)
	Freeing of a block of memory.
Variables
uint8_t	ke_mem_heap [KE_HEAP_SIZE]
	Data area reserved for the kernel heap.

Detailed Description

Heap management module.

The KEMEM module implements heap management functions that allow initializing heap, allocating and freeing memory.

void ke_free ( void * mem_ptr )

Freeing of a block of memory.

Free the memory area pointed by mem_ptr : mark the block as free and insert it in the pool of free block.

Parameters:

[in] mem_ptr Pointer to the memory area that need to be freed.

void * ke_malloc ( uint32_t size )

Allocation of a block of memory.

Allocates a memory block whose size is size; if no memory is available return NULL

Parameters:

[in] size Size of the memory area that need to be allocated.

struct mblock_free * ke_mem_init ( void ) [read]

Heap initialization.

This function performs the following operations:

sanity checks
check memory allocated is at least large enough to hold two block descriptors to hold start and end
initialize the first and last descriptors
save the pointer to the first free descriptor