[Haskell-cafe] Installing a top-level handler on an existing thread
leon.p.smith at gmail.com
Mon Jan 24 14:02:38 CET 2011
I've been toying with a little thread manager library, and for
sanity's sake I really need a way to install another top-level
exception handler on an existing thread. I don't want to replace
any other handlers, just put my own handler around the thread's
continuation. Of course, it would be pretty easy to do if the IO
monad had a nice efficient implementation of call/cc and call/cc1,
although I don't need the full power of continuations.
I really don't want to create my own "Thread" monad (which could use
ContT), I want to be able to do it on plain old IO threads. Is
there any way to do this in GHC?
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