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05.09.2008 at 09:19AM PDT, ID: 23389984 | Points: 250
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Attachment Details
Thread name
Zone: Microsoft Visual C++.Net
Does anyone know is there anyway to reterive a Thread Name

e.g. GetThreadname
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Question Stats
Zone: Microsoft
Question Asked By: FORNOW
Question Asked On: 05.09.2008
Participating Experts: 3
Points: 250
Views: 0
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05.09.2008 at 09:32AM PDT, ID: 21534470
roytal:

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05.09.2008 at 09:43AM PDT, ID: 21534579
evilrix:

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05.09.2008 at 09:59AM PDT, ID: 21534713

Rank: Guru

jaime_olivares:

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05.09.2008 at 03:35PM PDT, ID: 21536801
FORNOW:

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05.11.2008 at 02:13AM PDT, ID: 21541915
evilrix:

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05.11.2008 at 02:42AM PDT, ID: 21541962
FORNOW:

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05.11.2008 at 10:39AM PDT, ID: 21543025
evilrix:

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05.11.2008 at 10:41AM PDT, ID: 21543031
evilrix:

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05.11.2008 at 12:23PM PDT, ID: 21543226
FORNOW:

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05.11.2008 at 02:50PM PDT, ID: 21543619
evilrix:

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05.11.2008 at 03:42PM PDT, ID: 21543790
FORNOW:

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05.11.2008 at 03:50PM PDT, ID: 21543813
evilrix:

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05.11.2008 at 04:07PM PDT, ID: 21543857
FORNOW:

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05.11.2008 at 10:23PM PDT, ID: 21544787
evilrix:

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05.12.2008 at 12:15AM PDT, ID: 21545080
evilrix:

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05.12.2008 at 09:19AM PDT, ID: 21548253
FORNOW:

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05.09.2008 at 09:32AM PDT, ID: 21534470
roytal:
IMHO a thread has no attribute like name. Maybe ID retrieved with GetThreadId() is good enough?
 
05.09.2008 at 09:43AM PDT, ID: 21534579
evilrix:
>> Does anyone know is there anyway to reterive a Thread Name
Threads don't  have names. Theads are just paths of execution in a process, each with its own context (state info). If you want it to have a name you'll need to give it a name when you spin it... passing it into the threadproc (or thread functor) as userdata.
 
05.09.2008 at 09:59AM PDT, ID: 21534713

Rank: Guru

jaime_olivares:
Thread don't have names but Thread-class objects do (.Name property). Just in case you have created a thread with this .net class, you can get a reference to the objects and recover the name.
 
05.09.2008 at 03:35PM PDT, ID: 21536801
FORNOW:
The reason I ask Becuae in the DLL that is called I would line to know which thread I am processing

in The DLL_THEAD_ATTACH when i go throght VS  debugger I execute the CreateThread get the dwThreaid before conrol is trasnfered to the DLL and subsequently DLL_THREAD_ATTACH

iI figure if there was someway I could indentify the thread before DLL and DLL_THREAD_ATTACH message is execured I could identify the thread  
 
05.11.2008 at 02:13AM PDT, ID: 21541915
evilrix:
Well, as roytal eluded, threads have ids so you could use that or, as I stated above, if you need some specific format you can name them yourself by passing in the name as user data when you start the thread.
 
05.11.2008 at 02:42AM PDT, ID: 21541962
FORNOW:
If by UserData you mean pass it to the started thread function specfied on the CreateThread or in my Case I apoligize _beginthreadex (as the C++ DLL which I am writting is for  a C app) and i guess uses the CRT (C run time library) that gets executed (the started function) after the DLL_THREAD_ATTACH message has been processed

I need something I can do wih the threadid as that is returned to me before DLL_THREAD_ATTACH message is processed
 
05.11.2008 at 10:39AM PDT, ID: 21543025
evilrix:
>>  need something I can do wih the threadid as that is returned to me before DLL_THREAD_ATTACH message is processed
Then why not just use GetCurrentThreadId Function?

http://msdn.microsoft.com/en-us/library/ms683183.aspx
 
05.11.2008 at 10:41AM PDT, ID: 21543031
evilrix:
>> Then why not just use GetCurrentThreadId Function?
Of course, once a thread is terminated the thread ID can be recycled so you cannot assume it will be unique for the life of the process only the life of the thread!
 
05.11.2008 at 12:23PM PDT, ID: 21543226
FORNOW:
I tried GetCurrentThread and from there walking the Stack via VIa StackWalk unfortunatlly I ended

up going all the way to KiApcDispatch a APC type call meaning Async Procedure Call

That sort of kills the stack chain \\

was looking for another way to identify the thread if I have the threadid I figured I could set the thread name via SetthreadName and in DLL_THREAD_ATTACH  somehow reterive un fortunatly it doesn't look doable what I want to do
 
05.11.2008 at 02:50PM PDT, ID: 21543619
evilrix:
Did you try GetCurrentThreadId () like I suggested? If that doesn't work you are really out of options I think.
 
05.11.2008 at 03:42PM PDT, ID: 21543790
FORNOW:
I have many threads Just want to Process a few

I get the threaid before contol is transfered to the DLL via DLL_THREAD_ATTACH

the only way I can think of doing what I want is Doing some low level API's

PsAGetThreadByThreaid of course for this I have to raise to IRQL level getting the  TLS array pointer in the ETHREAD block maybe setting the name there
 
05.11.2008 at 03:50PM PDT, ID: 21543813
evilrix:
>> the only way I can think of doing what I want is Doing some low level API's

Ok, I shall ask you one last time before I abandon this question...

*** Did you try GetCurrentThreadId () like I suggested? ***
 
05.11.2008 at 04:07PM PDT, ID: 21543857
FORNOW:
The GetCurrentThreadId works but it does nothing for me its just a number

I have few threads I am looking to somehow identify them
 
05.11.2008 at 10:23PM PDT, ID: 21544787
evilrix:
>> The GetCurrentThreadId works but it does nothing for me its just a number
Ok, well that is about as good as it gets... there is no other way to identify a thread unless you name it yourself.
 
05.12.2008 at 12:15AM PDT, ID: 21545080
evilrix:
>> well that is about as good as it gets
You could use a map of thread id to thread name. This map would need to be visible to all threads and would need protecting via a mutex to prevent race conditions when accessing it. The idea is that when you spin up a thread you start it in a wait state, you (from the parent) insert the id and the name into the map and then unwait the thread. When the thread needs to know its name it can refer to the map. When the thread terminates it should remove its entry from the map.

http://www.cplusplus.com/reference/stl/map/
 
05.12.2008 at 09:19AM PDT, ID: 21548253
FORNOW:
What can I do with a threadid I have that before control id transfered to DLL_THREAD_ATTACH

The TLS functions e.g. alloc, get and set all work in the context of the current thread can I use the TLS functions for another thread If I have the threadid that would help  
 
 
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