git-annex/Annex/LockPool.hs
Joey Hess b6d46c212e git-annex (5.20140402) unstable; urgency=medium
* unannex, uninit: Avoid committing after every file is unannexed,
    for massive speedup.
  * --notify-finish switch will cause desktop notifications after each
    file upload/download/drop completes
    (using the dbus Desktop Notifications Specification)
  * --notify-start switch will show desktop notifications when each
    file upload/download starts.
  * webapp: Automatically install Nautilus integration scripts
    to get and drop files.
  * tahoe: Pass -d parameter before subcommand; putting it after
    the subcommand no longer works with tahoe-lafs version 1.10.
    (Thanks, Alberto Berti)
  * forget --drop-dead: Avoid removing the dead remote from the trust.log,
    so that if git remotes for it still exist anywhere, git annex info
    will still know it's dead and not show it.
  * git-annex-shell: Make configlist automatically initialize
    a remote git repository, as long as a git-annex branch has
    been pushed to it, to simplify setup of remote git repositories,
    including via gitolite.
  * add --include-dotfiles: New option, perhaps useful for backups.
  * Version 5.20140227 broke creation of glacier repositories,
    not including the datacenter and vault in their configuration.
    This bug is fixed, but glacier repositories set up with the broken
    version of git-annex need to have the datacenter and vault set
    in order to be usable. This can be done using git annex enableremote
    to add the missing settings. For details, see
    http://git-annex.branchable.com/bugs/problems_with_glacier/
  * Added required content configuration.
  * assistant: Improve ssh authorized keys line generated in local pairing
    or for a remote ssh server to set environment variables in an
    alternative way that works with the non-POSIX fish shell, as well
    as POSIX shells.

# imported from the archive
2014-04-02 21:42:53 +01:00

60 lines
1.3 KiB
Haskell

{- git-annex lock pool
-
- Copyright 2012, 2014 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
{-# LANGUAGE CPP #-}
module Annex.LockPool where
import Common.Annex
import Annex
import Types.LockPool
import qualified Data.Map as M
#ifndef mingw32_HOST_OS
import Annex.Perms
#else
import Utility.WinLock
#endif
{- Create a specified lock file, and takes a shared lock. -}
lockFile :: FilePath -> Annex ()
lockFile file = go =<< fromPool file
where
go (Just _) = noop -- already locked
go Nothing = do
#ifndef mingw32_HOST_OS
mode <- annexFileMode
lockhandle <- liftIO $ noUmask mode $
openFd file ReadOnly (Just mode) defaultFileFlags
liftIO $ waitToSetLock lockhandle (ReadLock, AbsoluteSeek, 0, 0)
#else
lockhandle <- liftIO $ waitToLock $ lockShared file
#endif
changePool $ M.insert file lockhandle
unlockFile :: FilePath -> Annex ()
unlockFile file = maybe noop go =<< fromPool file
where
go lockhandle = do
#ifndef mingw32_HOST_OS
liftIO $ closeFd lockhandle
#else
liftIO $ dropLock lockhandle
#endif
changePool $ M.delete file
getPool :: Annex LockPool
getPool = getState lockpool
fromPool :: FilePath -> Annex (Maybe LockHandle)
fromPool file = M.lookup file <$> getPool
changePool :: (LockPool -> LockPool) -> Annex ()
changePool a = do
m <- getPool
changeState $ \s -> s { lockpool = a m }