posix_memalign(3p) - phpMan

POSIX_MEMALIGN(3P)         POSIX Programmer's Manual        POSIX_MEMALIGN(3P)

PROLOG
       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
       implementation of this interface may differ (consult the  corresponding
       Linux  manual page for details of Linux behavior), or the interface may
       not be implemented on Linux.
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 com-
       pletion, the value pointed to by memptr shall be a multiple  of  align-
       ment.
       The  free()  function  shall deallocate memory that has previously been
       allocated by posix_memalign().
RETURN VALUE
       Upon successful completion, posix_memalign() shall return zero;  other-
       wise, 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 mul-
              tiple of sizeof( void *).
       ENOMEM There is insufficient memory available with the requested align-
              ment.

       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(3P)