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clarify comment and remove broken link

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There are archives of MC Knowledgebase, which google will find, I don't
want to try to keep a link to an archive working since MS is no longer
providing it.
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Joey Hess 2022-08-01 13:53:36 -04:00
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7
Utility/LockFile/Windows.hs
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@ -48,11 +48,12 @@ lockExclusive = openLock fILE_SHARE_NONE
-
- Will fail if the file is already open with an incompatible ShareMode.
- Note that this may happen if an unrelated process, such as a virus
- scanner, even looks at the file. See http://support.microsoft.com/kb/316609
- scanner, even looks at the file. See Microsoft KnowledgeBase article 316609
-
- Note that createFile busy-waits to try to avoid failing when some other
- process briefly has a file open. But that would make checking locks
- much more expensive, so is not done here. Thus, the use of c_CreateFile.
- process briefly has a file open. But that would make this busy-wait
- whenever the file is actually locked, for a rather long period of time.
- Thus, the use of c_CreateFile.
-
- Also, passing Nothing for SECURITY_ATTRIBUTES ensures that the lock file
- is not inherited by any child process.