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10.46.40 posix_memalign ¶

POSIX specification:
https://pubs.opengroup.org/onlinepubs/9799919799/functions/posix_memalign.html

Gnulib module: posix_memalign

Although this function is superseded by aligned_alloc, it is more portable to older systems that do not support C11. See aligned_alloc.

Portability problems fixed by Gnulib:

• This function returns a null pointer if the size argument is zero: AIX 7.3.
• This function produces misaligned results on some platforms: OpenBSD 6.1.

Portability problems not fixed by Gnulib:

• This function is missing on some platforms: Mac OS X 10.5, FreeBSD 6.0, NetBSD 3.0, OpenBSD 3.8, Minix 3.1.8, AIX 5.1, HP-UX 11, Solaris 10, Cygwin 1.5.x, mingw, MSVC 14, Android 4.1.
• If the alignment and size are absurdly large, this function crashes: glibc 2.40.

The Gnulib module aligned-malloc provides functions for allocating and freeing blocks of suitably aligned memory.

The Gnulib module pagealign_alloc provides a similar API for allocating and freeing blocks of memory aligned on a system page boundary.