futexes, PI and uclibc

Rob Landley rob at landley.net
Wed Aug 29 10:24:45 UTC 2007


On Monday 27 August 2007 5:01:13 pm Steven Rostedt wrote:
> Hi all,
>
> I'm writing a chapter in the upcoming revision of Building Embedded Linux
> Systems. In the chapter I talk about futexes and the new Priority
> Inheritance support (robust futexes as well).  This is only supported if
> the libc supports it too. So my question is,
>
> 1) Does uClibc support futexes

The NPTL branch (which is slated to become 0.9.30) does.  0.9.29 doesn't.

http://kernel.org/doc/ols/2006/linuxsymposium_procv1-pages-409-420.pdf
http://kernel.org/doc/ols/2006/slides/sjh-ols-2006-presentation.odp

> 2) Does it support PI futexes
> 3) Does it support robust futexes
> 4) if not, will it support it in the future

Not sure about #2 and #3, but #4 is "yes".

Rob
-- 
"One of my most productive days was throwing away 1000 lines of code."
  - Ken Thompson.



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