#5865: threadDelay is disrupted by system clock changes
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Reporter: joeyadams | Owner: pcapriotti
Type: bug | Status: patch
Priority: high | Milestone: 7.4.2
Component: Runtime System | Version: 7.4.1
Keywords: | Os: Unknown/Multiple
Architecture: Unknown/Multiple | Failure: Incorrect result at runtime
Difficulty: Unknown | Testcase:
Blockedby: | Blocking:
Related: |
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Comment(by joeyadams):
I don't think the Win32 patch is thread-safe. If two OS threads call
threadDelay simultaneously, it's possible for {{{static}}} variables like
{{{static HsWord64 previous_count}}} to be invalidated by concurrent
updates, since the assignment isn't guaranteed to be atomic (to my
knowledge).
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5865#comment:18>
GHC <http://www.haskell.org/ghc/>
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