[Haskell-cafe] Waiting for async exception (and nothing else)

David Turner dct25-561bs at mythic-beasts.com
Wed Aug 5 10:43:22 UTC 2015


Is there an elegant way to have a thread wait for an async exception but
nothing else? I tend to do something like

    forever $ threadDelay 1000000000

but this seems like a bit of a hack. Waiting on an otherwise-unused MVar or
doing 'atomically retry' don't work because GHC kills them off straight

The context is when using an API that only has a 'withMyThingy' wrapper and
no explicit openMyThingy and closeMyThingy alternatives. Perhaps that's an
API problem and the only way to work around this is with something a bit

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