Returns a 64-bit integer hopefully uniquely identifying the thread.
To be used in debugging output and logging only. The returned value is just a cast of a pointer to the 64-bit integer.
There is no guarantee that calling util_gthread_id on one thread first and later after that thread has dies on another won't return the same integer.
On Linux and Win32, known to really return a unique id for each thread existing at a certain time. No guarantee that ids won't be reused after a thread has terminated, though.
| thread |
A Thread pointer |
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A 64-bit integer. |