posix_memalign(3C) Standard C Library Functions posix_memalign(3C)NAMEposix_memalign - aligned memory allocation
SYNOPSIS
#include <sys/mman.h>
int posix_memalign(void **memptr, size_t alignment, size_t size);
DESCRIPTION
The posix_memalign() function allocates size bytes aligned on a bound‐
ary specified by alignment, and returns a pointer to the allocated mem‐
ory in memptr. The value of alignment must be a power of two multiple
of sizeof(void *).
Upon successful completion, the value pointed to by memptr will be a
multiple of alignment.
If the size of the space requested is 0, the value returned in memptr
will be a null pointer.
The free(3C) function will deallocate memory that has previously been
allocated by posix_memalign().
RETURN VALUES
Upon successful completion, posix_memalign() returns zero. Otherwise,
an error number is returned to indicate the error.
ERRORS
The posix_memalign() function will fail if:
EINVAL The value of the alignment parameter is not a power of two
multiple of sizeof(void *).
ENOMEM There is insufficient memory available with the requested
alignment.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│Interface Stability │Committed │
├─────────────────────────────┼─────────────────────────────┤
│MT-Level │MT-Safe │
├─────────────────────────────┼─────────────────────────────┤
│Standard │See standards(5). │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOfree(3C), malloc(3C), memalign(3C), attributes(5), standards(5)SunOS 5.11 14 Jul 2008 posix_memalign(3C)
