package picos

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Pico scheduler interface

Install

Dune Dependency

github.com Readme Changelog ISC License Edit opam file Versions (5)

Authors

V

Vesa Karvonen <vesa.a.j.k@gmail.com>

Maintainers

V

Vesa Karvonen <vesa.a.j.k@gmail.com>

Sources

picos-0.4.0.tbz

sha256=343a8b4759239ca0c107145b8e2cc94c14625fecc0b0887d3c40a9ab7537b8da

sha512=db22b0a5b3adc603c0e815c9011c779f892b9ace76be018b2198d3e24a7d96727c999701025fe5a5fd07d0b452cb7286fc50c939aba0e4dce809941e9ebc12a6

doc/picos.mpscq/Picos_mpscq/index.html

Module `Picos_mpscq`Source

Lock-free multi-producer, single-consumer queue.

🏎️ This data structure is optimized for use as a non-work-stealing scheduler's ready queue.

API

Sourcetype !'a t

A multi-producer, single-consumer queue.

Sourceval create : unit -> 'a t

create () returns a new empty multi-producer, single-consumer queue.

Interface for producers

ℹ️ The operations in this section can be called by both any number of producers and the single owner / consumer of the queue.

Sourceval push : 'a t -> 'a -> unit

push queue value adds the value to the tail of the queue.

Sourceval push_head : 'a t -> 'a -> unit

push_head queue value adds the value to the head of the queue.

Interface for the owner / consumer

⚠️ The operations in this section should only be called by the single owner / consumer of the queue.

Sourceexception Empty

Raised by pop_exn in case it finds the queue empty.

Sourceval pop_exn : 'a t -> 'a

pop_exn queue tries to remove the value at the head of the queue. Returns the removed value or raises Empty in case the queue was empty.

raises Empty
in case the queue was empty.

Sourceval pop_all : 'a t -> 'a Seq.t

pop_all queue removes all values from the queue and returns them as a sequence.

Examples

An example top-level session:

  # let q : int Picos_mpscq.t =
      Picos_mpscq.create ()
  val q : int Picos_mpscq.t = <abstr>

  # Picos_mpscq.push q 42
  - : unit = ()

  # Picos_mpscq.push_head q 76
  - : unit = ()

  # Picos_mpscq.push q 101
  - : unit = ()

  # Picos_mpscq.pop_exn q
  - : int = 76

  # Picos_mpscq.pop_all q |> List.of_seq
  - : int list = [42; 101]

On This Page

API
1. Interface for producers
2. Interface for the owner / consumer
Examples