[Haskell-cafe] two problems with Data.Binary and Data.ByteString
newsham at lava.net
Tue Aug 12 20:34:44 EDT 2008
>>> Log: savedState.bin: openFile: resource busy (file is locked)
>>> this does not occur if the program wasnt loaded. My best guess here
>>> is that B.readFile isnt completing and closing the file for some
>>> reason. Is there a good way to force this?
>> Lazy IO. So force the result to be evaluated, and then close the handle,
>> or use strict bytestring reading.
> There is no visible handle. It's all hidden in readFile.
> I will try forcing the data.
I tried to force the data with:
loadState db = do
d <- decode <$> B.readFile stateFile
let force = sum $ M.elems $ M.size `fmap` d
force `seq` atomically $ writeTVar db d
and I get the same error when trying to writeFile after doing
>> -- Don
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