[omniORB] Getting thread id for a service call

[Le Flour]

Hi all,
i would like to pause a service call during its execution. I am 
currently using Native Posix Thread Library and i cannot manage to get 
the thread id (with getpid which return the process id) and use the 
common signal's calls(with SIGSTOP and SIGCONT)
How could i get the current thread id corresponding to a service call in 
order to play with this id to pause this thread ?
In advance , thanks a lot for your anwser.
      Cheers
            Thierry Le Flour