rosmem.c File Reference

#include "lwip/opt.h"
#include "lwip/def.h"
#include "lwip/mem.h"

Include dependency graph for rosmem.c:

Go to the source code of this file.

Macros
#define	LWIP_TAG   'PIwl'

Functions
void *	malloc (mem_size_t size)
void *	calloc (mem_size_t count, mem_size_t size)
void	free (void *mem)
void *	realloc (void *mem, size_t size)

Macro Definition Documentation

LWIP_TAG

#define LWIP_TAG   'PIwl'

Definition at line 7 of file rosmem.c.

Function Documentation

calloc()

void* calloc	(	mem_size_t	count,
		mem_size_t	size
	)

Definition at line 17 of file rosmem.c.

{
    void *mem = malloc(count * size);
    
    if (!mem) return NULL;
    
    RtlZeroMemory(mem, count * size);
    
    return mem;
}

free()

void free

(

void *

mem

)

Definition at line 29 of file rosmem.c.

{
    ExFreePoolWithTag(mem, LWIP_TAG);
}

Referenced by realloc().

malloc()

void* malloc

(

mem_size_t

size

)

Definition at line 11 of file rosmem.c.

{
    return ExAllocatePoolWithTag(NonPagedPool, size, LWIP_TAG);
}

Referenced by calloc(), and realloc().

realloc()

void* realloc	(	void *	mem,
		size_t	size
	)

Definition at line 36 of file rosmem.c.

{
    void* new_mem;
    
    /* realloc() with a NULL mem pointer acts like a call to malloc() */
    if (mem == NULL) {
        return malloc(size);
    }
    
    /* realloc() with a size 0 acts like a call to free() */
    if (size == 0) {
        free(mem);
        return NULL;
    }
    
    /* Allocate the new buffer first */
    new_mem = malloc(size);
    if (new_mem == NULL) {
        /* The old buffer is still intact */
        return NULL;
    }
    
    /* Copy the data over */
    RtlCopyMemory(new_mem, mem, size);
    
    /* Deallocate the old buffer */
    free(mem);

    /* Return the newly allocated block */
    return new_mem;
}