Messages in this thread | | | From | Arnd Bergmann <> | Subject | Re: implementing Futex | Date | Fri, 14 Aug 2009 15:33:16 +0200 |
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On Friday 14 August 2009, Michael Schnell wrote: > Arnd Bergmann wrote: > > The man page says that the last parameter is ignored for op=FUTEX_WAKE, > > which is correct. The code that you were looking at however is for > > of=FUTEX_WAKE_OP, which is not documented as of manpages-3.22. > > > > It was added by Jakub back in 2005, but if he wrote a documentation > > for it, it never went into the man pages package. On a similar > > note, Ingo also added other futex operations that are not documented > > yet. > > > > Thus in any documented software, the quite complex stuff in > "futex_atomic_op_inuser", which is provided in several different > "futex.h" files for all those architectures never is used ?
No, my point was that futex_atomic_op_inuser is indeed used correctly, it's just not documented. See http://lwn.net/Articles/148830/ for the initial posting
> Is there any viable use for this ?
glibc heavily uses it for the pthreads implementation.
> Would it not be appropriate either to do a documentation or to remove it ?
Adding documentation, yes.
Arnd <><
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