Tablebase and concurrency

[TomSteu]

Hello everyone,

I have a question regarding the use of Tablebase in a concurrent environment. I'm worried that there might be interference if several threads or processes are trying to read and write to the .tab file simultaneously. I wonder if there are any mechanisms like locks in place to prevent such a scenario. Is it safe to use Tablebase :

• with several threads in tform
• with several processes in pform
• when several processes for the single threaded form are running simultaneously

cheers,
Tom

[jodavies]

Your first two options are fine, and I think in these cases only the master thread does any writing to the tablebase file. You should not use the third option.

#531 will provide the ability to use read-only tablebase files if one wants to protect the file from "accidental damage".

[TomSteu]

I suspected as much, thank you for the fast answer!