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Asked: 2026-05-30T15:12:42+00:00

What I am looking for is a simple function of type: alive :: ThreadID

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What I am looking for is a simple function of type:

alive :: ThreadID -> IO Bool
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  1. Editorial Team

    This is not possible with the standard base libraries as far as I know, but you can use the GHC specific API to get a thread’s status:

    import GHC.Conc

alive :: ThreadID -> IO Bool
alive = fmap (== ThreadRunning) . threadStatus
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