341269e035
* assistant, watcher: .gitignore files and other git ignores are now
honored, when git 1.8.4 or newer is installed.
(Thanks, Adam Spiers, for getting the necessary support into git for this.)
* importfeed: Ignores transient problems with feeds. Only exits nonzero
when a feed has repeatedly had a problems for at least 1 day.
* importfeed: Fix handling of dots in extensions.
* Windows: Added support for encrypted special remotes.
* Windows: Fixed permissions problem that prevented removing files
from directory special remote. Directory special remotes now fully usable.
# imported from the archive
56 lines
1.3 KiB
Haskell
56 lines
1.3 KiB
Haskell
{- git-annex lock pool
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-
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- Copyright 2012 Joey Hess <joey@kitenet.net>
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-
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- Licensed under the GNU GPL version 3 or higher.
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-}
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{-# LANGUAGE CPP #-}
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module Annex.LockPool where
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import qualified Data.Map as M
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import System.Posix.Types (Fd)
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import Common.Annex
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import Annex
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#ifndef mingw32_HOST_OS
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import Annex.Perms
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#endif
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{- Create a specified lock file, and takes a shared lock. -}
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lockFile :: FilePath -> Annex ()
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lockFile file = go =<< fromPool file
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where
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go (Just _) = noop -- already locked
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go Nothing = do
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#ifndef mingw32_HOST_OS
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mode <- annexFileMode
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fd <- liftIO $ noUmask mode $
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openFd file ReadOnly (Just mode) defaultFileFlags
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liftIO $ waitToSetLock fd (ReadLock, AbsoluteSeek, 0, 0)
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#else
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liftIO $ writeFile file ""
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let fd = 0
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#endif
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changePool $ M.insert file fd
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unlockFile :: FilePath -> Annex ()
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unlockFile file = maybe noop go =<< fromPool file
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where
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go fd = do
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#ifndef mingw32_HOST_OS
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liftIO $ closeFd fd
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#endif
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changePool $ M.delete file
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getPool :: Annex (M.Map FilePath Fd)
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getPool = getState lockpool
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fromPool :: FilePath -> Annex (Maybe Fd)
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fromPool file = M.lookup file <$> getPool
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changePool :: (M.Map FilePath Fd -> M.Map FilePath Fd) -> Annex ()
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changePool a = do
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m <- getPool
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changeState $ \s -> s { lockpool = a m }
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