Re: pthread library related

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

If there are no comments for these two patches.
I will move forward for other parts.

Sounds good?

2016-06-01 19:28 GMT-07:00 Charles Cui <charles.cui1984%gmail.com@localhost>:

> Hi guys,
>
>    I have attached patches based on comments from Christos.
> The new patch used atomic_inc_uint_nv to limit the number of
> sems used by each process. I have tested these patches.
> They worked.
>
> 2016-05-30 14:19 GMT-07:00 Charles Cui <charles.cui1984%gmail.com@localhost>:
>
>> good to know atomic_inc_uint_nv is implemented using cas.
>> I will update the patch and send you guys later (being careful about the
>> format)
>>
>> Thanks Charles
>>
>> 2016-05-30 13:46 GMT-07:00 Christos Zoulas <christos%zoulas.com@localhost>:
>>
>>> On May 30,  1:43pm, charles.cui1984%gmail.com@localhost (Charles Cui) wrote:
>>> -- Subject: Re: pthread library related
>>>
>>> | I am not familiar with _nv() (are there examples in the netbsd code
>>> base? I
>>> | searched _nv() in nxr, but did not found anything meaningful.),
>>> | but if you want to use atomic operations, one possible way is
>>> | compare-and-swap (CAS).
>>> | it has stronger guarantee than atomic inc or atomic dec, but also
>>> larger
>>> | overhead.
>>>
>>> man atomic_inc_uint_nv
>>>
>>> http://nxr.netbsd.org/xref/src/sys/fs/tmpfs/tmpfs_mem.c#185
>>>
>>> christos
>>>
>>
>>
>