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 <chris...@zoulas.com>: > On May 18, 3:40pm, charles.cui1...@gmail.com (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 >
