pthread_barrier_* API implementation

[Yaakov Selkowitz]

On 2016-02-01 00:41, Václav Haisman wrote:
> On rakudo.org ([1]) pages, I have noticed that the pthread_barrier_*
> POSIX API is missing from Cygwin. I took a look at NetBSD and FreeBSD
> implementations of it. It seemed to me that creating POSIX barrier on
> top of POSIX mutex and POSIX conditional variable is not that hard ([2]).
>
> Now, the question is whether this is acceptable and whether it should be
> part of Newlib or directly part of Cygwin?

IMO a barriers implementation would be welcome.  winsup/cygwin/thread.cc 
would be the place for it.

> Second, if I should pursue that, or if anyone who knows either Newlib or
> Cygwin better than I wants to mould the source into an acceptable form.
> I would not mind somebody else doing it. :D

PTC. :-)

> I have, in the past, contributed small patches to Cygwin and I had done
> the necessary copyright assignment paper work, so copyright should not
> be a problem.

That would certainly be a prerequisite.

-- 
Yaakov