This library provides a timer wheel data structure for
O(1) registering IO actions to fire after a given amount of time
O(1) canceling registered actions
It is similar to TimerManager from GHC.Event, but can scale much better
under concurrent access patterns.
An unreleased version of this library has a backpack-based signature for
selecting from a variety of different data structures used internally.
However, until backpack has broader support on Hackage, and in Haddocks,
etc, I decided to just hard-code something decent (a priority search queue).
This makes the O(1) claims above a bit of a lie, as these rely on using a
linked list data structure internally.
Changes
Changelog
All notable changes to this project will be documented in this file.
destroy function, for reaping the background thread
recurring_ function
Changed
If the timer wheel reaper thread crashes, it will propagate the exception to
the thread that spawned it
new may now throw InvalidTimerWheelConfig
The cancel action returned by register is now memoized, which fixes a bug
involving trying to cancel a recurring timer twice. The second call used to
spin forever and peg a CPU
