POSIX_MEMALIGN man page on Archlinux

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

       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.

       posix_memalign — aligned memory allocation (ADVANCED REALTIME)

       #include <stdlib.h>

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

       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 power of
       two multiple of sizeof(void *).

       Upon  successful	 completion, the value pointed to by memptr shall be a
       multiple of alignment.

       If the size of the space requested is 0, the  behavior  is  implementa‐
       tion-defined;  the  value  returned  in	memptr	shall be either a null
       pointer or a unique pointer.

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

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

       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‐

       The following sections are informative.


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



       free(), malloc()

       The Base Definitions volume of POSIX.1‐2008, <stdlib.h>

       Portions	 of  this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
       --  Portable  Operating	System	Interface (POSIX), The Open Group Base
       Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
       cal  and	 Electronics  Engineers,  Inc  and  The	 Open Group.  (This is
       POSIX.1-2008 with the 2013 Technical Corrigendum	 1  applied.)  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.unix.org/online.html .

       Any typographical or formatting errors that appear  in  this  page  are
       most likely to have been introduced during the conversion of the source
       files to man page format. To report such errors,	 see  https://www.ker‐
       nel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group		     2013		    POSIX_MEMALIGN(3P)

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