WasiClock

2 types2 values2 functions

The host's clocks, read in nanoseconds. realtime tells the time of day; monotonic measures how long something took, since it never goes backwards.

start = WasiClock.now(WasiClock.monotonic)?

At a glance

@Clock
Which of the host's clocks to read.
Result
Shorthand for [Ok(a) | Err(e)], the variant this module's fallible functions return.
realtime
Wall-clock time: nanoseconds since the Unix epoch, which the host may move.
monotonic
A clock that never goes backwards, from an unspecified origin: for measuring how long something took, not for telling the time.
now
Nanoseconds.
resolution
The clock's tick length, in nanoseconds.

type @Clock

Which of the host's clocks to read. Opaque: only this module builds one.

Result(a, e) = [Ok(a) | Err(e)]

Shorthand for [Ok(a) | Err(e)], the variant this module's fallible functions return.

@Clockpure

Wall-clock time: nanoseconds since the Unix epoch, which the host may move.

@Clockpure

A clock that never goes backwards, from an unspecified origin: for measuring how long something took, not for telling the time.

(@Clock) -> Result(Int, [ClockUnavailable | e])impure

Nanoseconds. now(realtime) is wall-clock time since the Unix epoch; now(monotonic) counts from an unspecified origin and never goes backwards.

(@Clock) -> Result(Int, [ClockUnavailable | e])impure

The clock's tick length, in nanoseconds.