Safe Haskell	None
Language	Haskell2010

System.Clock.Seconds

Synopsis

data Clock
- = Monotonic
- | Realtime
- | ProcessCPUTime
- | ThreadCPUTime
newtype Seconds = Seconds {
- toTimeSpec :: TimeSpec
}
getTime :: Clock -> IO Seconds
getRes :: Clock -> IO Seconds
fromNanoSecs :: Integer -> Seconds
toNanoSecs :: Seconds -> Integer
diffTimeSpec :: Seconds -> Seconds -> Seconds

Documentation

data Clock #

Clock types. A clock may be system-wide (that is, visible to all processes) or per-process (measuring time that is meaningful only within a process). All implementations shall support Realtime.

Constructors

Monotonic	The identifier for the system-wide monotonic clock, which is defined as a clock measuring real time, whose value cannot be set via `clock_settime` and which cannot have negative clock jumps. The maximum possible clock jump shall be implementation defined. For this clock, the value returned by `getTime` represents the amount of time (in seconds and nanoseconds) since an unspecified point in the past (for example, system start-up time, or the Epoch). This point does not change after system start-up time. Note that the absolute value of the monotonic clock is meaningless (because its origin is arbitrary), and thus there is no need to set it. Furthermore, realtime applications can rely on the fact that the value of this clock is never set. (Identical to `Boottime` since Linux 4.17, see https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d6ed449afdb38f89a7b38ec50e367559e1b8f71f) `CLOCK_MONOTONIC` (macOS - `SYSTEM_CLOCK`)
Realtime	The identifier of the system-wide clock measuring real time. For this clock, the value returned by `getTime` represents the amount of time (in seconds and nanoseconds) since the Epoch. `CLOCK_REALTIME` (macOS - `CALENDAR_CLOCK`, Windows - `GetSystemTimeAsFileTime`)
ProcessCPUTime	The identifier of the CPU-time clock associated with the calling process. For this clock, the value returned by `getTime` represents the amount of execution time of the current process.
ThreadCPUTime	The identifier of the CPU-time clock associated with the calling OS thread. For this clock, the value returned by `getTime` represents the amount of execution time of the current OS thread.

Instances

Instances details

Enum Clock #

Instance details

Defined in System.Clock

Methods

succ :: Clock -> Clock #

pred :: Clock -> Clock #

toEnum :: Int -> Clock #

fromEnum :: Clock -> Int #

enumFrom :: Clock -> [Clock] #

enumFromThen :: Clock -> Clock -> [Clock] #

enumFromTo :: Clock -> Clock -> [Clock] #

enumFromThenTo :: Clock -> Clock -> Clock -> [Clock] #

Generic Clock #

Instance details

Defined in System.Clock

Associated Types

type Rep Clock

Instance details

Defined in System.Clock

type Rep Clock = D1 ('MetaData "Clock" "System.Clock" "clock-0.8.4-1Iyz9hRU5kCEtgkYfkMm3v" 'False) ((C1 ('MetaCons "Monotonic" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "Realtime" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "ProcessCPUTime" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "ThreadCPUTime" 'PrefixI 'False) (U1 :: Type -> Type)))

Methods

from :: Clock -> Rep Clock x #

to :: Rep Clock x -> Clock #

Read Clock #

Instance details

Defined in System.Clock

Methods

readsPrec :: Int -> ReadS Clock #

readList :: ReadS [Clock] #

readPrec :: ReadPrec Clock #

readListPrec :: ReadPrec [Clock] #

Show Clock #

Instance details

Defined in System.Clock

Methods

showsPrec :: Int -> Clock -> ShowS #

show :: Clock -> String #

showList :: [Clock] -> ShowS #

Eq Clock #

Instance details

Defined in System.Clock

Methods

(==) :: Clock -> Clock -> Bool #

(/=) :: Clock -> Clock -> Bool #

type Rep Clock #

Instance details

Defined in System.Clock

type Rep Clock = D1 ('MetaData "Clock" "System.Clock" "clock-0.8.4-1Iyz9hRU5kCEtgkYfkMm3v" 'False) ((C1 ('MetaCons "Monotonic" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "Realtime" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "ProcessCPUTime" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "ThreadCPUTime" 'PrefixI 'False) (U1 :: Type -> Type)))

newtype Seconds #

Constructors

Seconds
Fields toTimeSpec :: TimeSpec

Instances

Instances details

Storable Seconds #

Instance details

Defined in System.Clock.Seconds

Methods

sizeOf :: Seconds -> Int #

alignment :: Seconds -> Int #

peekElemOff :: Ptr Seconds -> Int -> IO Seconds #

pokeElemOff :: Ptr Seconds -> Int -> Seconds -> IO () #

peekByteOff :: Ptr b -> Int -> IO Seconds #

pokeByteOff :: Ptr b -> Int -> Seconds -> IO () #

peek :: Ptr Seconds -> IO Seconds #

poke :: Ptr Seconds -> Seconds -> IO () #

Bounded Seconds #

Instance details

Defined in System.Clock.Seconds

Methods

minBound :: Seconds #

maxBound :: Seconds #

Enum Seconds #

Instance details

Defined in System.Clock.Seconds

Methods

succ :: Seconds -> Seconds #

pred :: Seconds -> Seconds #

toEnum :: Int -> Seconds #

fromEnum :: Seconds -> Int #

enumFrom :: Seconds -> [Seconds] #

enumFromThen :: Seconds -> Seconds -> [Seconds] #

enumFromTo :: Seconds -> Seconds -> [Seconds] #

enumFromThenTo :: Seconds -> Seconds -> Seconds -> [Seconds] #

Generic Seconds #

Instance details

Defined in System.Clock.Seconds

Associated Types

type Rep Seconds
Instance details Defined in System.Clock.Seconds type Rep Seconds = D1 ('MetaData "Seconds" "System.Clock.Seconds" "clock-0.8.4-1Iyz9hRU5kCEtgkYfkMm3v" 'True) (C1 ('MetaCons "Seconds" 'PrefixI 'True) (S1 ('MetaSel ('Just "toTimeSpec") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 TimeSpec)))