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Module Timerfd

Signature

module Clock : sig .. end
Clock used to mark the progress of a timer.
module Flags : sig .. end
type t = private Core.Core_unix.File_descr.t
val t_of_sexp : Sexplib.Sexp.t -> t
val sexp_of_t : t -> Sexplib.Sexp.t
val compare : t -> t -> int
val __bin_read_t__ : (int -> t) Core_kernel.Std.Bin_prot.Read.reader
val to_file_descr : t -> Core.Core_unix.File_descr.t
val create : (?flags:Flags.t -> Clock.t -> t) Core_kernel.Std.Or_error.t

create ?flags clock creates a new timer file descriptor. With Linux 2.6.26 or earlier flags must be empty.

val set_at : t -> Core_kernel.Std.Time_ns.t -> unit

set_at t at and set_after t span set t to fire once, at at or after span. set_after treats span <= 0 as span = 1ns; unlike the underlying system call, timerfd_settime, it does not clear the timer if span = 0. To clear a timerfd, use Timerfd.clear.

set_repeating ?after t interval sets t to fire every interval starting after after (default is interval), raising if interval <= 0.

val set_after : t -> Core_kernel.Std.Time_ns.Span.t -> unit
val set_repeating : ?after:Core_kernel.Std.Time_ns.Span.t -> t -> Core_kernel.Std.Time_ns.Span.t -> unit
val clear : t -> unit

clear t causes t to not fire any more.

type repeat = {
fire_after
: Core_kernel.Std.Time_ns.Span.t ;
interval
: Core_kernel.Std.Time_ns.Span.t ;
}
val get : t -> [
| `Not_armed
| `Fire_after of Core_kernel.Std.Time_ns.Span.t
| `Repeat of repeat
]

get t returns the current state of the timer t.