You can set up a timer to call a function at a specified future time or after a certain length of idleness.
Emacs cannot run timers at any arbitrary point in a program; it can run them only when Emacs could accept output from a subprocess: namely, while waiting or inside certain primitive functions such as sit-for or read-event which _can_ wait. Therefore, a timer's execution may be delayed if Emacs is busy. However, the time of execution is very precise if Emacs is idle.
(Info-goto-node "(elisp)Timers")
include Value.Subtypetype t = private Value.tWe expose private value for free identity conversions when the value is nested in some covariant type, e.g. (symbols : Symbol.t list :> Value.t list) rather than List.map symbols ~f:Symbol.to_value.
val sexp_of_t : t -> Ppx_sexp_conv_lib.Sexp.teq t1 t2 = Value.eq (to_value t1) (to_value t2), i.e. eq checks whether the Emacs values underlying t1 and t2 are physically equal. This is different than phys_equal t1 t2, because we don't always wrap eq Emacs values in phys_equal OCaml values. I.e. phys_equal t1 t2 implies eq t1 t2, but not the converse.
val of_value_exn : Ecaml__.Value0.t -> tval to_value : t -> Ecaml__.Value0.tval type_ : t Value.Type.tval all_scheduled : unit -> t list(describe-variable 'timer-list)
val is_scheduled : t -> boolval run_after :
?repeat:Core_kernel.Time_ns.Span.t ->
Core_kernel.Time_ns.Span.t ->
(unit -> unit) ->
t(describe-function 'run-at-time) (Info-goto-node "(elisp)Timers")
val run_after_i :
?repeat:Core_kernel.Time_ns.Span.t ->
Core_kernel.Time_ns.Span.t ->
(unit -> unit) ->
unitrun_after_i s f = ignore (run_after s f)
val cancel : t -> unit(describe-function 'cancel-timer) (Info-goto-node "(elisp)Timers")
val sit_for : ?redisplay:bool -> Core_kernel.Time_ns.Span.t -> unit(describe-function 'sit-for) (Info-goto-node "(elisp)Waiting")
val sleep_for : Core_kernel.Time_ns.Span.t -> unit(describe-function 'sleep-for) (Info-goto-node "(elisp)Waiting")