pthread_barrier_* API implementation

Václav Haisman
Tue Feb 2 12:50:00 GMT 2016

On 1 February 2016 at 08:38, Yaakov Selkowitz <> wrote:
> On 2016-02-01 00:41, Václav Haisman wrote:
>> On ([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/
> 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

Well, I tried and I started adding the functions into the
file (
Then I noticed I do not know where to put the necessary structures.
Newlib headers seem to already contain some definitions of
pthread_barrier_t and pthread_barrierattr_t. The organization of the
source escapes me.


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