package octez-internal-libs

  1. Overview
  2. Docs
package octez-internal-libs
Legend:
Library
Module
Module type
Parameter
Class
Class type
include module type of struct include Mtime end

Monotonic time spans

type span = Mtime.span

The type for non-negative monotonic time spans. They represent the difference between two monotonic clock readings. If the platform's clock has nanosecond resolution the representation guarantees that the function Mtime_clock.elapsed can measure up to approximatively 584 Julian year spans before silently rolling over (unlikely since this is in a single program run).

module Span = Mtime.Span

Monotonic time spans.

Monotonic timestamps

Note. Only use timestamps if you need inter-process time correlation, otherwise prefer Mtime_clock.elapsed and counters.

type t = Mtime.t

The type for monotonic timestamps relative to an indeterminate system-wide event (e.g. last startup). Their absolute value has no meaning but can be used for inter-process time correlation.

val to_uint64_ns : t -> int64

to_uint64_ns t is t as an unsigned 64-bit integer nanosecond timestamp. The absolute value is meaningless.

val of_uint64_ns : int64 -> t

to_uint64_ns t is t is an unsigned 64-bit integer nanosecond timestamp as a timestamp.

Warning. Timestamps returned by this function should only be used with other timestamp values that are know to come from the same operating system run.

val min_stamp : t

min_stamp is the earliest timestamp.

val max_stamp : t

max_stamp is the latest timestamp.

Predicates

val equal : t -> t -> bool

equal t t' is true iff t and t' are equal.

val compare : t -> t -> int

compare t t' orders timestamps by increasing time.

val is_earlier : t -> than:t -> bool

is_earlier t ~than is true iff t occurred before than.

val is_later : t -> than:t -> bool

is_later t ~than is true iff t occurred after than.

Arithmetic

val span : t -> t -> span

span t t' is the span between t and t' regardless of the order between t and t'.

val add_span : t -> span -> t option

add_span t s is the timestamp s units later than t or None if the result overflows.

val sub_span : t -> span -> t option

sub_span t s is the timestamp s units earlier than t or None if the result underflows.

Formatting

val pp : Format.formatter -> t -> unit

pp formats t as an unsigned 64-bit integer nanosecond timestamp. Note that the absolute value is meaningless.

val dump : Format.formatter -> t -> unit

dump ppf t formats an unspecified raw representation of t on ppf.

val span_to_s : Mtime.span -> float
val span_to_us : Mtime.span -> float
OCaml

Innovation. Community. Security.

GitHub Discord Twitter Peertube RSS
About
Changelog Releases Industrial Users Academic Users Why OCaml
Ecosystem
Packages Community Events OCaml Planet Jobs
Resources
Install OCaml Get Started Platform Tools Language Manual Standard Library API Books Exercises Papers OCaml Playground Logo
Policies
Carbon Footprint Governance Privacy Code of Conduct