Mercurial > hg > octave-lyh > gnulib-hg
changeset 16121:d2f39a0d2549
pagealign_alloc: Doc and comments.
* doc/posix-functions/posix_memalign.texi: Refer to the pagealign_alloc
module.
* lib/pagealign_alloc.c (pagealign_alloc): Add comment.
| author | Bruno Haible <bruno@clisp.org> |
|---|---|
| date | Sat, 26 Nov 2011 00:24:43 +0100 |
| parents | ff91f9a60967 |
| children | e3e8e2fc21a9 |
| files | ChangeLog doc/posix-functions/posix_memalign.texi lib/pagealign_alloc.c |
| diffstat | 3 files changed, 13 insertions(+), 0 deletions(-) [+] |
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--- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,10 @@ +2011-11-25 Bruno Haible <bruno@clisp.org> + + pagealign_alloc: Doc and comments. + * doc/posix-functions/posix_memalign.texi: Refer to the pagealign_alloc + module. + * lib/pagealign_alloc.c (pagealign_alloc): Add comment. + 2011-11-25 Jim Meyering <meyering@redhat.com> test-update-copyright.sh: avoid false-positive failure
--- a/doc/posix-functions/posix_memalign.texi +++ b/doc/posix-functions/posix_memalign.texi @@ -17,3 +17,6 @@ MacOS X 10.5, FreeBSD 6.0, NetBSD 3.0, OpenBSD 3.8, Minix 3.1.8, AIX 5.1, HP-UX 11, IRIX 6.5, OSF/1 5.1, Solaris 10, Cygwin 1.5.x, mingw, MSVC 9, Interix 3.5, BeOS. @end itemize + +The Gnulib module @code{pagealign_alloc} provides a similar API +that returns memory aligned on a system page boundary.
--- a/lib/pagealign_alloc.c +++ b/lib/pagealign_alloc.c @@ -123,6 +123,9 @@ pagealign_alloc (size_t size) { void *ret; + /* We prefer the mmap() approach over the posix_memalign() or malloc() + based approaches, since the latter often waste an entire memory page + per call. */ #if HAVE_MMAP # ifdef HAVE_MAP_ANONYMOUS const int fd = -1;