[GHC] #6061: threadDelay broken on Windows

[GHC]

#6061: threadDelay broken on Windows
---------------------------------+------------------------------------------
    Reporter:  simonmar          |       Owner:  pcapriotti      
        Type:  bug               |      Status:  patch           
    Priority:  highest           |   Milestone:  7.6.1           
   Component:  Compiler          |     Version:  7.4.1           
    Keywords:                    |          Os:  Unknown/Multiple
Architecture:  Unknown/Multiple  |     Failure:  None/Unknown    
  Difficulty:  Unknown           |    Testcase:                  
   Blockedby:                    |    Blocking:                  
     Related:                    |  
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Changes (by pcapriotti):

  * status:  new => patch


Comment:

 I realized that we can actually work around the clock skew issue by
 calculating the delay target directly in the IO manager thread, assuming
 it always wakes up promptly enough to make the difference in timing
 negligible.

 The attached patch fixes the `ThreadDelay001` test for me.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/6061#comment:3>
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