Re: pthread library related

[Charles Cui <charles.cui1984%gmail.com@localhost>]

Thanks Christos, Martin and SODA for these advices and documents!
I will start to get familiar with freebsd designs and try to contribute as
much
as possible to netbsd community.

2016-05-19 10:36 GMT-07:00 Christos Zoulas <christos%zoulas.com@localhost>:

> On May 18,  3:40pm, charles.cui1984%gmail.com@localhost (Charles Cui) wrote:
> -- Subject: pthread library related
>
> | Hi guys,
> |
> |
> |    I spent some time on pthread libraries in netbsd which is a big part
> in
> | my project, and have some questions to ask.
> | Taking pthread_barrierattr_getpshared, pthread_barrierattr_setpshared
> | as an example. These functions  are used to getting and setting
> barrierattr
> | data structure. netbsd has several fields in the data structure, while
> | freebsd has the only pshared field. I am wondering which fields in the
> | implementation of netbsd can be used as pshare in netbsd?
> | Following are definitions of netbsd vs freebsd, the same problems exist
> in
> | mutexattr, condattr and rwlockattr. Also are there any documents which
> | describe implementation details in netbsd? It would be great if we have.
>
> You can see how FreeBSD is implementing them; it is a lot of code to do
> this and would require some architectural review. The relevant files are:
>
> http://nxr.netbsd.org/xref/src-freebsd/lib/libthr/thread/thr_pshared.c
> http://nxr.netbsd.org/xref/src-freebsd/lib/libthr/thread/thr_barrierattr.c
> http://nxr.netbsd.org/xref/src-freebsd/sys/kern/kern_umtx.c
>
> We don't have such mutex functionality in our kernel. Implementing this
> would be a GSoC project in itself.
>
> christos
>