o $Th@s*ddlmZddlmZGdddZdS))Lock)Callablec@s4eZdZdZd ddZdegdfdefddZdS) OncezExecute a function exactly once and block all callers until the function returns Same as golang's `sync.Once `_ returnNcCst|_d|_dS)NF)r_lock_done)selfr Y/home/air/segue/gemini/back/venv/lib/python3.10/site-packages/opentelemetry/util/_once.py__init__s z Once.__init__funccCsZ|jrdS|j|js|d|_ WddSWddS1s&wYdS)zExecute ``func`` if it hasn't been executed or return. Will block until ``func`` has been called by one thread. Returns: Whether or not ``func`` was executed in this call FTN)rr)rr r r r do_onces  z Once.do_once)rN)__name__ __module__ __qualname____doc__r rboolr r r r r rs rN) threadingrtypingrrr r r r s