[GHC] #3937: Cannot killThread in listen/accept on Windows threaded runtime

[GHC]

#3937: Cannot killThread in listen/accept on Windows threaded runtime
-------------------------------+--------------------------------------------
    Reporter:  guest           |        Owner:               
        Type:  bug             |       Status:  new          
    Priority:  normal          |    Milestone:  6.14.1       
   Component:  Runtime System  |      Version:  6.12.1       
    Keywords:                  |   Difficulty:               
          Os:  Windows         |     Testcase:               
Architecture:  x86             |      Failure:  Runtime crash
-------------------------------+--------------------------------------------
Changes (by simonmar):

  * milestone:  => 6.14.1


Comment:

 This is because on Windows we don't delegate blocking IO operations to an
 IO manager thread, as we do on Unix systems.  Hopefully this will be fixed
 in 6.14.1 (maybe that's optimistic as nobody has volunteered to build a
 Windows version of the IO manager yet, but still).

 One workaround is to explicitly fork a thread and pass the result back in
 an `MVar`. It's easy to abstract this into a little function.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3937#comment:1>
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