module Make_unreliable: 
functor (M : MCLOCK) -> 
functor (MT : MTICK) -> WATCHER_FUN 

Unreliable, monotonic, clock tick watchers.

Make_unreliable has the following properties. Given a watcher w:

• If there is no Tick.LIFECYCLE.suspend event while Tick.WATCHER.waiting w is true. The value of Tick.WATCHER.linger_ns w is an accurate and exact wall-clock time span.
• Watcher triggers being functions they are not persisted and do not survive a Tick.LIFECYCLE.poweroff event.

These properties are typically sufficient for watching small timeouts in protocol implementations.

type t 

type trigger = t -> unit 

include Tick.WATCHER