posix_memalign.c File Reference

#include <aligned_malloc.h>
#include <assert.h>
#include <errno.h>
#include <stddef.h>

Include dependency graph for posix_memalign.c:

Macros
#define	IS_POWER_2(x)   (!((x) & ((x)-1)))

Functions
int	posix_memalign (void **__memptr, size_t __alignment, size_t __size)
	Posix Memory Alignment Extension. More...

Macro Definition Documentation

IS_POWER_2

#define IS_POWER_2

(

x

)

(!((x) & ((x)-1)))

Function Documentation

posix_memalign()

int posix_memalign	(	void **	memptr,
		size_t	alignment,
		size_t	size
	)

Posix Memory Alignment Extension.

Generated aligned memory. This function forwards the request to aligned malloc. Allocated memory must be freed with aligned_free().

Parameters

memptr	A pointer to the pointer which will store the aligned memory. The memory must be freed with aligned_free(). memptr must not be NULL.
alignment	The target alignment for the memory. Must be a power of 2.
size	The size of the allocation. Must be > 0.

Precondition

memptr is not NULL. alignment is power-of-2. size > 0.

Returns

ENOMEM if memory could not be allocated, EINVAL if alignment is not a power-of-2, and 0 on successful allocation.

References aligned_malloc(), assert, EINVAL, ENOMEM, IS_POWER_2, NULL, and r.

Referenced by posix_memalign_test().

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