eio 0.15 · OCaml Package

This library is used to write event traces using OCaml's runtime events infrastructure.

type id = int

type obj_ty =

val obj_ty_to_string : obj_ty -> string

type cc_ty =

val cc_ty_to_string : cc_ty -> string

val create_fiber : (id * id) Runtime_events.User.t

val create_cc : (id * cc_ty) Runtime_events.User.t

val create_obj : (id * obj_ty) Runtime_events.User.t

val log : string Runtime_events.User.t

val enter_span : string Runtime_events.User.t

val exit_span : unit Runtime_events.User.t

val name : (id * string) Runtime_events.User.t

val suspend_fiber : string Runtime_events.User.t

val exit_cc : unit Runtime_events.User.t

val exit_fiber : id Runtime_events.User.t

val error : (id * exn) Runtime_events.User.t

val fiber : id Runtime_events.User.t

val get : id Runtime_events.User.t

val try_get : id Runtime_events.User.t

val put : id Runtime_events.User.t

val suspend_domain : Runtime_events.Type.span Runtime_events.User.t

val domain_spawn : id Runtime_events.User.t

type event = [

| `Create of id * [ `Fiber_in of id | `Cc of cc_ty | `Obj of obj_ty ]
| `Fiber of id
(*
The given fiber is now running.
*)
| `Name of id * string
(*
Names a promise, stream, etc.
*)
| `Log of string
(*
The running fiber logs a message.
*)
| `Enter_span of string
(*
The running fiber enters a traced section.
*)
| `Exit_span
(*
The running fiber leaves the current traced section.
*)
| `Get of id
(*
The running fiber gets a value from a promise, stream, acquires a lock, etc.
*)
| `Try_get of id
(*
The running fiber wants to get, but must wait.
*)
| `Put of id
(*
The running fiber resolves a promise, adds to a stream, releases a lock etc.
*)
| `Error of id * string
(*
A CC fails with the given error.
*)
| `Exit_cc
(*
The current CC ends.
*)
| `Exit_fiber of id
(*
The running fiber ends.
*)
| `Suspend_domain of Runtime_events.Type.span
(*
The domain asks the OS to wait for events.
*)
| `Suspend_fiber of string
(*
The running fiber is suspended (until resumed by `Fiber).
*)
| `Domain_spawn of id
(*
The current domain was spawned by fiber id.
*)

]

val pp_event : Stdlib.Format.formatter -> event -> unit

pp_event formats an event as a human-readable string

val add_callbacks : 
  (int -> Runtime_events.Timestamp.t -> event -> unit) ->
  Runtime_events.Callbacks.t ->
  Runtime_events.Callbacks.t

add_callbacks fn x adds event handler fn to x.

When an Eio event is processed, it calls fn ring_id ts event.

package eio