Re: [Dazuko-help] dazuko and threads

[John Ogness]

Hi,

There is a new pre-release of Dazuko available: 1.2.2-pre3

http://savannah.gnu.org/download/dazuko/dazuko-1.2.2-pre3.tar.gz

This version has full multi-thread support through a new ThreadSafe API
(_TS). This interface is exactly the same from the standard interface
except:

1. All functions have _TS at the end
2. All functions require a pointer to a dazuko_t structure
3. dazukoInitialization() is a new function to initialize the dazuko_t
structure

Each thread should have its own dazuko_t structure, which is used when
calling the Dazuko functions. A multi-threaded example program is also
included (example_mt.c). Please have a look at it for usage.

If you encounter any problems with this implementation, please let me know.

John Ogness


John Ogness wrote:
> Hi,
> 
> Yes, there are still problems with multiple threads. The current CVS
> version handles them correctly, however it implements a "controversial"
> solution. The next pre-release 1.2.2-pre3 will include perfect thread
> support and I can even supply sample code.
> 
> I am going on vacation for 2.5 weeks, so this new version probably won't
> be available until mid-August. You could, however, check out the CVS
> version and try it out.
> 
> cvs -z3 -d:pserver:address@hidden:/cvsroot/dazuko co dazuko
> 
> John Ogness
> 
> 
> Frantisek Mensik wrote:
> 
>>Hi,
>>I'm sorry. I didn't notice that I had an older version of dazuko. You
>>are right, it works correctly in the newer 1.2.2-pre2 version.
>>But I've noticed that there have been still active dazuko registrations
>>after the program abnormal termination (if it doesn't call
>>dazukoUnregister function).
>>
>>-F.Mensik
>>
>>John Ogness wrote:
>>
>>
>>>Hi,
>>>
>>>What kinds of errors were you getting? Dazuko identifies registered
>>>processes by PID. Since each thread in Linux has its own PID, it must
>>>register separately. Threads of a registered process will not be
>>>recognized as registered.
>>>
>>>If you compile Dazuko using with the -DDEBUG flag, then Dazuko will
>>>output more information about what is going on. It might help to make
>>>things clearer.
>>>
>>>John Ogness
>>>
>>>
>>>Frantisek Mensik wrote:
>>>
>>>
>>>>Hi,
>>>>I've tryed it in a test application and I couldn't register in second
>>>>and third threads. Wouldn't it be better to register only once in a main
>>>>thread, than create threads (pthread_create) which would get access from
>>>>included files.
>>>>
>>>>-Frantisek Mensik
>>>>
>>>>
>>>>John Ogness wrote:
>>>>
>>>>
>>>>
>>>>>Hi,
>>>>>
>>>>>Yes, each thread may register with Dazuko. However, each thread is then
>>>>>also responsible for handling file access control.
>>>>>
>>>>>John Ogness
>>>>>
>>>>>
>>>>>Frantisek Mensik wrote:
>>>>>
>>>>>
>>>>>
>>>>>>Hi,
>>>>>>if I have an application with more threads, is it possible to register
>>>>>>dazuko from each thread?
>>>>>>Thanks for an answer,
>>>>>>-F.M.

-- 
Dazuko Maintainer