POSIX_MEMALIGN(3) BSD Programmer's Manual POSIX_MEMALIGN(3)
posix_memalign - aligned memory allocation
#include <stdlib.h> int posix_memalign(void **ptr, size_t alignment, size_t size);
The posix_memalign() function allocates size bytes of memory such that the allocation's base address is a multiple of alignment, and returns the allocation in the value pointed to by ptr. The requested alignment must be a power of 2 at least as large as sizeof(void *). Memory that is allocated via posix_memalign() can be used as an argument in subsequent calls to realloc(3) and free(3).
The posix_memalign() function returns the value 0 if successful; other- wise it returns an error value.
The posix_memalign() function will fail if: [EINVAL] The alignment parameter is not a power of 2 at least as large as sizeof(void *). [ENOMEM] Memory allocation error.
free(3), malloc(3), realloc(3)
The posix_memalign() function conforms to IEEE Std 1003.1-2001 ("POSIX").
The posix_memalign() function first appeared in OpenBSD 4.8. MirOS BSD #10-current December 21, 2012 1
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