package picos

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Pico scheduler framework

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-0.3.0.tbz

sha256=544804c0bde4b29764f82f04e7defed7c06bc43e5a6ce3f7fdc326cb54a7f066

sha512=4c93427e477fb52374a554a8b9c4c92836a9b5899161275d1473269ab526a1f59177209140631ed763a55be375855dea12f076e18bf4124522414986c0e257be

doc/picos.select/Picos_select/Intr/index.html

Module `Picos_select.Intr`Source

A mechanism to interrupt blocking Unix IO operations.

⚠️ The mechanism uses a signal which should not be used for other purposes.

⚠️ Beware that signal handling in OCaml 5.0.0 is known to be broken and several fixes were included in OCaml 5.1.0.

Sourcetype t

Represents an optional interrupt request.

Sourceval nothing : t

A constant for a no request. clr nothing does nothing.

Sourceval req : seconds:float -> t

req ~seconds requests an interrupt in the form of a signal delivered to the thread that made the request within the specified number of seconds. Blocking Unix IO calls typically raise an error with the Unix.EINTR error code when they are interrupted by a signal. Regardless of whether the signal gets triggered or a system call gets interrupted, the request must be cleared exactly once!

⚠️ Due to limitations of the OCaml system modules and unlike with typical timeout mechanisms, the interrupt may also be triggered sooner.

Sourceval clr : t -> unit

clr req either cancels or acknowledges the interrupt request. Every req must be cleared exactly once!