package lwt

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Promises and event-driven I/O

Install 

dune-project
 Dependency

github.com Readme MIT License Edit opam file Versions (27)

Authors

  1. J
    Jérôme Vouillon
  2. J
    Jérémie Dimino

Maintainers

  1. Anton Bachin

Sources

4.4.0.tar.gz
sha256=749bfda935744ee2954a7c03dd6c1a523f2100a2818592dbf6eaf6d6a9798bbc
md5=8bfc70c2944020fa08dd04877747f5f9

doc/lwt.unix/Lwt_throttle/Make/index.html

Module Lwt_throttle.Make

Parameters

Signature

type key = H.t
type t
val create : rate:int -> max:int -> n:int -> t

Creates a rate limiter.

  • parameter rate

    Maximum number of promise resolutions per second, per channel.

  • parameter max

    Maximum number of pending promises allowed at once, over all channels.

  • parameter n

    Initial size of the internal channel hash table. This should be approximately the number of different channels that will be used.

val wait : t -> key -> bool Lwt.t

Lwt_throttle.wait limiter channel returns a new promise associated with the given rate limiter and channel.

If the maximum number of pending promises for limiter has not been reached, the promise starts pending. It will be resolved with true at some future time, such that the rate limit of limiter is not exceeded, with respect to other promises in the same channel.

If the maximum number of pending promises has been reached, the returned promise is already resolved with false.