Data.Time.Clock.System
| Safe Haskell | Safe-Inferred |
|---|---|
| Language | Haskell2010 |
Description
Fast access to the system clock.
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
| Eq SystemTime | |
Defined in Data.Time.Clock.Internal.SystemTime | |
| Ord SystemTime | |
Defined in Data.Time.Clock.Internal.SystemTime Methodscompare :: SystemTime -> SystemTime -> Ordering (<) :: SystemTime -> SystemTime -> Bool (<=) :: SystemTime -> SystemTime -> Bool (>) :: SystemTime -> SystemTime -> Bool (>=) :: SystemTime -> SystemTime -> Bool max :: SystemTime -> SystemTime -> SystemTime min :: SystemTime -> SystemTime -> SystemTime | |
| Show SystemTime | |
Defined in Data.Time.Clock.Internal.SystemTime MethodsshowsPrec :: Int -> SystemTime -> ShowS Source show :: SystemTime -> String Source showList :: [SystemTime] -> ShowS Source | |
| NFData SystemTime | |
Defined in Data.Time.Clock.Internal.SystemTime Methodsrnf :: SystemTime -> () Source | |
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/8.10.2/docs/html/libraries/time-1.9.3/Data-Time-Clock-System.html