[GHC] #5926: Add strict versions of modifyIORef and atomicModifyIORef

[GHC]

#5926: Add strict versions of modifyIORef and atomicModifyIORef
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  Reporter:  joeyadams                |          Owner:  simonmar        
      Type:  feature request          |         Status:  closed          
  Priority:  normal                   |      Milestone:  7.6.1           
 Component:  libraries/base           |        Version:  7.4.1           
Resolution:  fixed                    |       Keywords:                  
        Os:  Unknown/Multiple         |   Architecture:  Unknown/Multiple
   Failure:  Runtime performance bug  |     Difficulty:  Unknown         
  Testcase:                           |      Blockedby:                  
  Blocking:                           |        Related:                  
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Comment(by dons):

 For historical reference, see this 2009 thread on the issue (I was trying
 to find this thread, but google doesn't seem to like to index it).

 * [http://www.haskell.org/pipermail/haskell-cafe/2009-June/063137.html
 IORef memory leak]

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5926#comment:3>
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