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Diffstat (limited to 'libraries/base/GHC/IO/Handle/Lock/Common.hs')
| -rw-r--r-- | libraries/base/GHC/IO/Handle/Lock/Common.hs | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/libraries/base/GHC/IO/Handle/Lock/Common.hs b/libraries/base/GHC/IO/Handle/Lock/Common.hs new file mode 100644 index 0000000000..b85e0916ab --- /dev/null +++ b/libraries/base/GHC/IO/Handle/Lock/Common.hs @@ -0,0 +1,21 @@ +{-# LANGUAGE NoImplicitPrelude #-} + +-- | Things common to all file locking implementations. +module GHC.IO.Handle.Lock.Common + ( FileLockingNotSupported(..) + , LockMode(..) + ) where + +import GHC.Exception +import GHC.Show + +-- | Exception thrown by 'hLock' on non-Windows platforms that don't support +-- 'flock'. +data FileLockingNotSupported = FileLockingNotSupported + deriving Show -- ^ @since 4.10.0.0 + +-- ^ @since 4.10.0.0 +instance Exception FileLockingNotSupported + +-- | Indicates a mode in which a file should be locked. +data LockMode = SharedLock | ExclusiveLock |