Safe Haskell	None
Language	Haskell2010

Distribution.Compat.Time

Synopsis

newtype ModTime = ModTime Word64
getModTime :: FilePath -> NoCallStackIO ModTime
getFileAge :: FilePath -> NoCallStackIO Double
getCurTime :: NoCallStackIO 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

Bounded ModTime Source #
Instance details Defined in Distribution.Compat.Time Methods minBound :: ModTime Source # maxBound :: ModTime Source #
Eq ModTime Source #
Instance details Defined in Distribution.Compat.Time Methods (==) :: ModTime -> ModTime -> Bool Source # (/=) :: ModTime -> ModTime -> Bool Source #
Ord ModTime Source #
Instance details Defined in Distribution.Compat.Time Methods compare :: ModTime -> ModTime -> Ordering Source # (<) :: ModTime -> ModTime -> Bool Source # (<=) :: ModTime -> ModTime -> Bool Source # (>) :: ModTime -> ModTime -> Bool Source # (>=) :: ModTime -> ModTime -> Bool Source # max :: ModTime -> ModTime -> ModTime Source # min :: ModTime -> ModTime -> ModTime Source #
Read ModTime Source #
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 Source #
Instance details Defined in Distribution.Compat.Time Methods showsPrec :: Int -> ModTime -> ShowS Source # show :: ModTime -> String Source # showList :: [ ModTime ] -> ShowS Source #
Generic ModTime Source #
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 #
Binary ModTime Source #
Instance details Defined in Distribution.Compat.Time Methods put :: ModTime -> Put Source # get :: Get ModTime Source # putList :: [ ModTime ] -> Put Source #
Structured ModTime Source #
Instance details Defined in Distribution.Compat.Time Methods structure :: Proxy ModTime -> Structure Source # structureHash' :: Tagged ModTime MD5
type Rep ModTime Source #
Instance details Defined in Distribution.Compat.Time type Rep ModTime = D1 (' MetaData "ModTime" "Distribution.Compat.Time" "Cabal-3.2.1.0-3w1fQQbNnuQ5xlFGwVXcPy" ' True ) ( C1 (' MetaCons "ModTime" ' PrefixI ' False ) ( S1 (' MetaSel (' Nothing :: Maybe Symbol ) ' NoSourceUnpackedness ' NoSourceStrictness ' DecidedLazy ) ( Rec0 Word64 )))

getModTime :: FilePath -> NoCallStackIO 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 -> NoCallStackIO Double Source #

Return age of given file in days.

getCurTime :: NoCallStackIO 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.