#2808: createDirectoryIfMissing should be atomic
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Reporter: EricKow | Owner: igloo
Type: merge | Status: reopened
Priority: normal | Milestone: 6.10.2
Component: libraries/directory | Version: 6.10.1
Severity: normal | Resolution:
Keywords: | Difficulty: Unknown
Testcase: | Os: Unknown/Multiple
Architecture: Unknown/Multiple |
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Comment (by simonmar):
Dropping some notes here so I don't forget over the holidays:
* This new version fails `createDirectory001`, because the dir gets
removed
between `createDirectory` and `doesDirectoryExist`, resulting in a
isAlreadyExists exception being thrown. We could do better here by
calling `System.Posix.getFileStatus` if available. (ToDo: what about
Windows?)
* the test should check for two threads both doing
`createDirectoryIfExists; cleanup` too.
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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2808#comment:9>
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