posix_memalign(3p) - phpMan

POSIX_MEMALIGN(P)                                            POSIX_MEMALIGN(P)



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 spec-
       ified 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  mul-
       tiple 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 .



POSIX                                2003                    POSIX_MEMALIGN(P)

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