Safe Haskell	Safe-Inferred
Language	Haskell2010

Distribution.Compat.Time

Synopsis

newtype ModTime = ModTime Word64
getModTime :: FilePath -> IO ModTime
getFileAge :: FilePath -> IO Double
getCurTime :: IO ModTime
posixSecondsToModTime :: Int64 -> ModTime
calibrateMtimeChangeDelay :: IO (Int, Int)

Documentation

newtype ModTime Source #

An opaque type representing a file's modification time, represented internally as a 64-bit unsigned integer in the Windows UTC format.

Constructors

ModTime Word64

Instances

Instances details

Structured ModTime #
Instance details Defined in Distribution.Compat.Time Methods structure :: Proxy ModTime -> Structure Source # structureHash' :: Tagged ModTime MD5
Bounded ModTime #
Instance details Defined in Distribution.Compat.Time Methods minBound :: ModTime Source # maxBound :: ModTime Source #
Generic ModTime #
Instance details Defined in Distribution.Compat.Time Associated Types type Rep ModTime :: Type -> Type Source # Methods from :: ModTime -> Rep ModTime x Source # to :: Rep ModTime x -> ModTime Source #
Read ModTime #
Instance details Defined in Distribution.Compat.Time Methods readsPrec :: Int -> ReadS ModTime Source # readList :: ReadS [ModTime] Source # readPrec :: ReadPrec ModTime Source # readListPrec :: ReadPrec [ModTime] Source #
Show ModTime #
Instance details Defined in Distribution.Compat.Time Methods showsPrec :: Int -> ModTime -> ShowS Source # show :: ModTime -> String Source # showList :: [ModTime] -> ShowS Source #
Binary ModTime #
Instance details Defined in Distribution.Compat.Time Methods put :: ModTime -> Put Source # get :: Get ModTime Source # putList :: [ModTime] -> Put Source #
Eq ModTime #
Instance details Defined in Distribution.Compat.Time Methods (==) :: ModTime -> ModTime -> Bool # (/=) :: ModTime -> ModTime -> Bool #
Ord ModTime #
Instance details Defined in Distribution.Compat.Time Methods compare :: ModTime -> ModTime -> Ordering # (<) :: ModTime -> ModTime -> Bool # (<=) :: ModTime -> ModTime -> Bool # (>) :: ModTime -> ModTime -> Bool # (>=) :: ModTime -> ModTime -> Bool # max :: ModTime -> ModTime -> ModTime # min :: ModTime -> ModTime -> ModTime #
type Rep ModTime #
Instance details Defined in Distribution.Compat.Time type Rep ModTime = D1 ('MetaData "ModTime" "Distribution.Compat.Time" "Cabal-3.5.0.0" 'True) (C1 ('MetaCons "ModTime" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Word64)))

getModTime :: FilePath -> IO ModTime Source #

Return modification time of the given file. Works around the low clock resolution problem that getModificationTime has on GHC < 7.8.

This is a modified version of the code originally written for Shake by Neil Mitchell. See module Development.Shake.FileInfo.

getFileAge :: FilePath -> IO Double Source #

Return age of given file in days.

getCurTime :: IO ModTime Source #

Return the current time as ModTime.

posixSecondsToModTime :: Int64 -> ModTime Source #

Convert POSIX seconds to ModTime.

calibrateMtimeChangeDelay :: IO (Int, Int) Source #

Based on code written by Neil Mitchell for Shake. See sleepFileTimeCalibrate in Type. Returns a pair of microsecond values: first, the maximum delay seen, and the recommended delay to use before testing for file modification change. The returned delay is never smaller than 10 ms, but never larger than 1 second.