#14810: Define MVar "This function is atomic only if there are no other producers for this MVar." -------------------------------------+------------------------------------- Reporter: akfp | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: libraries/base | Version: 8.2.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Documentation | Unknown/Multiple bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by akfp): The sentence might need to link to the section: "In particular, the "bigger" functions in this module (readMVar, swapMVar, withMVar, modifyMVar_ and modifyMVar) are simply the composition of a takeMVar followed by a putMVar with exception safety. These only have atomicity guarantees if all other threads perform a takeMVar before a putMVar as well; otherwise, they may block." or that section needs to define "producer". -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14810#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler