#4001: Implement an atomic readMVar -------------------------------------------+-------------------------------- Reporter: simonmar | Owner: ezyang Type: task | Status: new Priority: low | Milestone: 7.6.2 Component: Runtime System | Version: 6.12.2 Keywords: | Os: Unknown/Multiple Architecture: Unknown/Multiple | Failure: None/Unknown Difficulty: Moderate (less than a day) | Testcase: Blockedby: | Blocking: Related: | -------------------------------------------+-------------------------------- Comment(by ezyang): It occurs to me that there is a problem with the current implementation, which is that we may do an unbounded amount of work while the spinlock for an MVar is taken out. Probably the right thing to do is arrange for the closure to be unlocked before we start spinning up threads. -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/4001#comment:12 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler