Scheduler

Documentation

class Scheduler s where

Represents a queue of IO actions which can be executed in FIFO order.

Methods

schedule :: s -> SchedulerIO s () -> IO Disposable

Schedules an action on the scheduler. Returns a disposable which can be used to cancel it.

Instances

Scheduler BackgroundScheduler

Scheduler MainScheduler

data SchedulerIO s a

An IO computation that must be performed in a scheduler of type s.

Instances

Scheduler s => Monad (SchedulerIO s)

Functor (SchedulerIO s)

Scheduler s => Applicative (SchedulerIO s)

Scheduler s => MonadIO (SchedulerIO s)

Show v => Show (SchedulerIO BackgroundScheduler v)

Show v => Show (SchedulerIO MainScheduler v)

Unsafely executes a SchedulerIO action and shows the result. This is for DEBUGGING PURPOSES ONLY.

getCurrentScheduler :: Scheduler s => SchedulerIO s s

Returns the scheduler that the calling code is executing on.

data BackgroundScheduler

A scheduler which runs enqueued actions in a dedicated background thread.

Instances

Scheduler BackgroundScheduler

Show v => Show (SchedulerIO BackgroundScheduler v)

newScheduler :: IO BackgroundScheduler

Creates a new background scheduler.