Thread IDs

[Peter Nguyen]

I was more wondering how to get the numerical ID of the thread after  
i've created one. Is it possible to obtain that at all?

Peter

On 19/01/2010, at 8:06 PM, Stefan Kalkowski wrote:

> Hi Peter,
>
> On Tuesday, 19. January 2010 06:30:22 Peter Nguyen wrote:
>> Hi,
>>
>> So I've done some more messing around with genode (running on top  
>> of OKL4),
>> more specifically creating some threads, and testing the  
>> functionality in
>> general. I'm wondering how i can go about obtaining the thread's ID  
>> and
>> printing it out. I've noticed that there are functions that are  
>> within the
>> Thread class that can get me a Native_thread_id, but currently I  
>> can't seem
>> to do much with it.
>>
>> Speaking of the native thread, is that type related to L4? Can I  
>> actually
>> get a numerical value for that ID?
>
> that's right, 'Native_thread_id' is the platform-specific thread
> representation, so in the OKL4-case it is 'L4_ThreadId_t' indeed. The
> kernel-specific thread id in Genode/OKL4 is a member of  
> 'Thread_state' a
> thread property, that can be obtained via the cpu-session interface.
>
> Although, it is recommended to use only generic Genode abstractions  
> to stay
> platform-independent, if you've to deal with the kernel-api  
> directly, you
> might use the cpu-session interface to gain some platform-specific  
> thread
> data within 'Thread_state'.
>
> Here is some example code, printing all OKL4 thread IDs of one cpu- 
> session:
>
>  int i;
>  Genode::Thread_state state;
>  Genode::Thread_capability tcap = Genode::env()->cpu_session()- 
> >first();
>  while(tcap.valid())
>  {
>     Genode::env()->cpu_session()->state(tcap, &state);
>     PDBG("tid of thread no. %d is %lx", i, state.tid.raw);
>     tcap = Genode::env()->cpu_session()->next(tcap);
>     ++i;
>  }
>
> Thereby, the order of the threads given by cpu-session's iterator  
> isn't
> necessarily the order of the thread's creation time!
>
> Regards
> Stefan
>
>>
>> Peter
>>
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>
>
>
> -- 
> Stefan Kalkowski
> Genode Labs Developer
> http://genode-labs.com
>
> ------------------------------------------------------------------------------
> Throughout its 18-year history, RSA Conference consistently attracts  
> the
> world's best and brightest in the field, creating opportunities for  
> Conference
> attendees to learn about information security's most important  
> issues through
> interactions with peers, luminaries and emerging and established  
> companies.
> http://p.sf.net/sfu/rsaconf-dev2dev
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