aligned_malloc.c File Reference

#include <assert.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdlib.h>
#include "aligned_malloc.h"
#include "malloc.h"

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Macros
#define	align_up(num, align)   (((num) + ((align)-1)) & ~((align)-1))
	Simple macro for making sure memory addresses are aligned to the nearest power of two. More...
#define	PTR_OFFSET_SZ   sizeof(offset_t)
	Macro for accessing the size of our current pointer offset. More...

Typedefs
typedef uint16_t	offset_t
	Number of bytes we're using for storing the aligned pointer offset. More...

Functions
void *	aligned_malloc (size_t align, size_t size)
	We will call malloc with extra bytes for our header and the offset required to guarantee the desired alignment. More...
void	aligned_free (void *ptr)
	aligned_free works like free(), but we work backwards from the returned pointer to find the correct offset and pointer location to return to free() Note that it is VERY BAD to call free() on an aligned_malloc() pointer. More...

Macro Definition Documentation

align_up

#define align_up	(		num,
			align
	)		(((num) + ((align)-1)) & ~((align)-1))

Simple macro for making sure memory addresses are aligned to the nearest power of two.

PTR_OFFSET_SZ

#define PTR_OFFSET_SZ   sizeof(offset_t)

Macro for accessing the size of our current pointer offset.

Typedef Documentation

offset_t

typedef uint16_t offset_t

Number of bytes we're using for storing the aligned pointer offset.

Function Documentation

aligned_free()

void aligned_free

(

void *

ptr

)

aligned_free works like free(), but we work backwards from the returned pointer to find the correct offset and pointer location to return to free() Note that it is VERY BAD to call free() on an aligned_malloc() pointer.

Free aligned memory.

References assert, free(), and p.

Referenced by aligned_malloc_test(), embutil::aligned_sptr(), embutil::aligned_uptr(), and posix_memalign_test().

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aligned_malloc()

void* aligned_malloc	(	size_t	align,
		size_t	size
	)

We will call malloc with extra bytes for our header and the offset required to guarantee the desired alignment.

Allocated aligned memory.

References align_up, assert, malloc(), NULL, p, and PTR_OFFSET_SZ.

Referenced by aligned_malloc_test(), embutil::aligned_sptr(), embutil::aligned_uptr(), and posix_memalign().

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