JuliaLang
Implement Once type for pthread_once like functionality
This is a way to start the discussion. It uses a very pthread_once API. We might want to go fancier and also maybe move the callback to inside the struct. I'm not sure what do people prefer
One important design question still left is. What happens if we error here. IMO we should set a flag that this failed and error. The flag would also make anyone else that calls this also error. Hopefully avoiding executing code in a bad state.
One important design question still left is. What happens if we error here. IMO we should set a flag that this failed and error. The flag would also make anyone else that calls this also error. Hopefully avoiding executing code in a bad state.
Perhaps we actually store the error? So anybody who comes along later can be thrown the same error instead of just a generic thing?
