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haskell / 9 / libraries / time-1.12.2 / data-time-clock-system.html

Data.Time.Clock.System

Safe Haskell Safe
Language Haskell2010

Description

Fast access to the system clock.

systemEpochDay :: Day Source

The day of the epoch of SystemTime, 1970-01-01

data SystemTime Source

SystemTime is time returned by system clock functions. Its semantics depends on the clock function, but the epoch is typically the beginning of 1970. Note that systemNanoseconds of 1E9 to 2E9-1 can be used to represent leap seconds.

Constructors

MkSystemTime

Fields
Instances
Instances details
Data SystemTime Source
Instance details

Defined in Data.Time.Clock.Internal.SystemTime

Methods

gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> SystemTime -> c SystemTime Source

gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c SystemTime Source

toConstr :: SystemTime -> Constr Source

dataTypeOf :: SystemTime -> DataType Source

dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c SystemTime) Source

dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c SystemTime) Source

gmapT :: (forall b. Data b => b -> b) -> SystemTime -> SystemTime Source

gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> SystemTime -> r Source

gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> SystemTime -> r Source

gmapQ :: (forall d. Data d => d -> u) -> SystemTime -> [u] Source

gmapQi :: Int -> (forall d. Data d => d -> u) -> SystemTime -> u Source

gmapM :: Monad m => (forall d. Data d => d -> m d) -> SystemTime -> m SystemTime Source

gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> SystemTime -> m SystemTime Source

gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> SystemTime -> m SystemTime Source
Show SystemTime Source
Instance details

Defined in Data.Time.Clock.Internal.SystemTime

Methods

showsPrec :: Int -> SystemTime -> ShowS Source

show :: SystemTime -> String Source

showList :: [SystemTime] -> ShowS Source
NFData SystemTime Source
Instance details

Defined in Data.Time.Clock.Internal.SystemTime

Methods

rnf :: SystemTime -> () Source
Eq SystemTime Source
Instance details

Defined in Data.Time.Clock.Internal.SystemTime

Methods

(==) :: SystemTime -> SystemTime -> Bool

(/=) :: SystemTime -> SystemTime -> Bool
Ord SystemTime Source
Instance details

Defined in Data.Time.Clock.Internal.SystemTime

Methods

compare :: SystemTime -> SystemTime -> Ordering

(<) :: SystemTime -> SystemTime -> Bool

(<=) :: SystemTime -> SystemTime -> Bool

(>) :: SystemTime -> SystemTime -> Bool

(>=) :: SystemTime -> SystemTime -> Bool

max :: SystemTime -> SystemTime -> SystemTime

min :: SystemTime -> SystemTime -> SystemTime

truncateSystemTimeLeapSecond :: SystemTime -> SystemTime Source

Map leap-second values to the start of the following second. The resulting systemNanoseconds will always be in the range 0 to 1E9-1.

getSystemTime :: IO SystemTime Source

Get the system time, epoch start of 1970 UTC, leap-seconds ignored. getSystemTime is typically much faster than getCurrentTime.

systemToUTCTime :: SystemTime -> UTCTime Source

Convert SystemTime to UTCTime, matching zero SystemTime to midnight of systemEpochDay UTC.

utcToSystemTime :: UTCTime -> SystemTime Source

Convert UTCTime to SystemTime, matching zero SystemTime to midnight of systemEpochDay UTC.

systemToTAITime :: SystemTime -> AbsoluteTime Source

Convert SystemTime to AbsoluteTime, matching zero SystemTime to midnight of systemEpochDay TAI.

© The University of Glasgow and others
Licensed under a BSD-style license (see top of the page).
https://downloads.haskell.org/~ghc/9.4.2/docs/libraries/time-1.12.2/Data-Time-Clock-System.html