NAME

       posix_memalign - aligned memory allocation (ADVANCED REALTIME)

SYNOPSIS

       #include <stdlib.h>

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

DESCRIPTION

       The posix_memalign() function shall allocate size bytes aligned on a boundary specified by alignment, and
       shall  return  a pointer to the allocated memory in memptr. The value of alignment shall be a multiple of
       sizeof( void *), that is also a power of two. Upon successful completion, the value pointed to by  memptr
       shall be a multiple of alignment.

       The free() function shall deallocate memory that has previously been allocated by posix_memalign().

RETURN VALUE

       Upon  successful  completion,  posix_memalign()  shall  return  zero; otherwise, an error number shall be
       returned to indicate the error.

ERRORS

       The posix_memalign() function shall 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.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       The posix_memalign() function is part of the Advisory Information option and need not be provided on  all
       implementations.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       free() , malloc() , the Base Definitions volume of IEEE Std 1003.1-2001, <stdlib.h>

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition,
       Standard  for  Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base
       Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers,
       Inc and The Open Group. In the event of any discrepancy between this version and the  original  IEEE  and
       The  Open  Group  Standard,  the  original  IEEE and The Open Group Standard is the referee document. The
       original Standard can be obtained online at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group                                   2003                                     POSIX_MEMALIGN(P)