| Safe Haskell | None |
|---|---|
| Language | Haskell2010 |
System.Clock
Description
High-resolution, realtime clock and timer functions for Posix systems. This module is being developed according to IEEE Std 1003.1-2008: http://www.opengroup.org/onlinepubs/9699919799/ , http://www.opengroup.org/onlinepubs/9699919799/functions/clock_getres.html#
Synopsis
-
data
Clock
- = Monotonic
- | Realtime
- | ProcessCPUTime
- | ThreadCPUTime
- | MonotonicRaw
- data TimeSpec = TimeSpec { }
- getTime :: Clock -> IO TimeSpec
- getRes :: Clock -> IO TimeSpec
- fromNanoSecs :: Integer -> TimeSpec
- toNanoSecs :: TimeSpec -> Integer
- diffTimeSpec :: TimeSpec -> TimeSpec -> TimeSpec
- timeSpecAsNanoSecs :: TimeSpec -> Integer
- normalize :: TimeSpec -> TimeSpec
- s2ns :: Num a => a
Documentation
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
|
| Realtime |
The identifier of the system-wide clock measuring real time. For this
clock, the value returned by
|
| ProcessCPUTime |
The identifier of the CPU-time clock associated with the calling
process. For this clock, the value returned by
|
| ThreadCPUTime |
The identifier of the CPU-time clock associated with the calling OS
thread. For this clock, the value returned by
|
| MonotonicRaw |
(since Linux 2.6.28, macOS 10.12)
Similar to
|
Instances
TimeSpec structure
Instances
getTime :: Clock -> IO TimeSpec Source #
The
getTime
function shall return the current value for the
specified clock.
getRes :: Clock -> IO TimeSpec Source #
The
getRes
function shall return the resolution of any clock.
Clock resolutions are implementation-defined and cannot be set
by a process.
fromNanoSecs :: Integer -> TimeSpec Source #
TimeSpec from nano seconds.
toNanoSecs :: TimeSpec -> Integer Source #
TimeSpec to nano seconds.
timeSpecAsNanoSecs :: TimeSpec -> Integer Source #
Deprecated: Use toNanoSecs instead! Replaced timeSpecAsNanoSecs with the same signature TimeSpec -> Integer
TimeSpec as nano seconds.