Glib: Gthread: unique thread id question

[avpak ngs ru]

Hello!

Is there any function that provides unique id for each 
thread?
In documentation I've read about GThread structure and 
g_thread_self() function.
Although there is no statement that GThread* returned by 
g_thread_self() is unique for calling thread.
Small test example has revealed that g_thread_self() is 
unique for any thread created with g_thread_create().
But for threads created with pthread_create() I've seen 
that sometimes g_thread_self() returned same pointer for 
different threads.
   Anton Pak