libstud-uuid

A portable, dependency-free, MIT-licensed UUID generation library for C++ that tries to make reasonably sure the generated IDs are unique.

Specifically, the implementation calls platform-specific APIs that were carefully analyzed for uniqueness guarantees (good source of randomness, time collision prevention, etc). If an API does not explicitly provide such guarantees or if such guarantees are only provided for certain UUID versions, then the implementation will refuse to return such a UUID if a strong uniqueness was requested.