Module Async_kernel.Handler

A continuation that captures the current Async execution context.

It can be scheduled for future invocation by installing it in a deferred.

type 'a t

val create : ('a ‑> unit) ‑> 'a t

create k creates a handler by coupling the continuation k together with the evaluation context that is current at the time create is called. Whenever this handler is later invoked, it will happen in this saved evaluation context.

val prepend : 'a t ‑> f:('b ‑> 'a) ‑> 'b t

prepend h ~f pre-composes the handler with the function f

val filter : 'a t ‑> f:('a ‑> bool) ‑> 'a t

filter h ~f makes the eventual execution of the handler h on a value v dependent on whether predicate f holds of v

val install : 'a t ‑> 'a Deferred.t ‑> unit ‑> unit

install h d behaves like upon except that it also returns a uninstall function that, when called, uninstalls the handler

val schedule : 'a t ‑> 'a ‑> unit

schedule h v schedules the handler h to run at some point in the future by being called on value v