ghc-lukko

This package provides access to platform dependent file locking APIs:

Open file descriptor locking on Linux ("Lukko.OFD")  'flock' locking on unix
platforms ("Lukko.FLock")  Windows locking 'LockFileEx' ("Lukko.Windows") 
No-op locking, which throws exceptions ("Lukko.NoOp")  "Lukko" module exports
the best option for the target platform with uniform API.

There are alternative file locking packages:

"GHC.IO.Handle.Lock" in 'base >= 4.10' is good enough for most use cases.
However, uses only 'Handle's so these locks cannot be used for intra-process
locking. (You should use e.g. 'MVar' in addition).

<https://hackage.haskell.org/package/filelock filelock> doesn't support OFD
locking.


/Lukko/ means lock in Finnish.
Submodules "Lukko.OFD", "Lukko.Windows" etc are available based on following
conditions.
' if os(windows) cpp-options: -DHAS_WINDOWS_LOCK
elif (os(linux) && flag(ofd-locking)) cpp-options: -DHAS_OFD_LOCKING
cpp-options: -DHAS_FLOCK
elif !(os(solaris) || os(aix)) cpp-options: -DHAS_FLOCK '
"Lukko.FLock" is available on not (Windows or Solaris or AIX).
"Lukko.NoOp" is always available.

          

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License: GPL-2.0-or-later AND BSD-3-Clause
URL: https://hackage.haskell.org/package/lukko