Is this library threadsafe?

[nixomose]

There's nothing obvious to lead me to believe that it is not thread safe (like a initialization section) but I can't find anywhere where it explicitly states that the hash function XXH64 is threadsafe. Can you confirm this?

[Cyan4973]

Yes, XXH64() is totally thread safe, using no resource beyond its own small stack variables.

Streaming variant XXH64_reset() is multi-threadable.
It requires a state XXH64_state_t, each thread shall have its own state.

[nixomose]

very cool, thanks for the quick response.