35 lines
1 KiB
OCaml
35 lines
1 KiB
OCaml
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(* From lwt/src/unix/lwt_main.ml *)
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let rec run t =
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(* Wakeup paused threads now. *)
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Lwt.wakeup_paused ();
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match Lwt.poll t with
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| Some x -> x
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| None ->
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(* Call enter hooks. *)
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Mirage_runtime.run_enter_iter_hooks ();
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(* Do the main loop call. *)
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Lwt_engine.iter (Lwt.paused_count () = 0);
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(* Wakeup paused threads again. *)
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Lwt.wakeup_paused ();
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(* Call leave hooks. *)
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Mirage_runtime.run_leave_iter_hooks ();
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run t
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(* If the platform doesn't have SIGPIPE, then Sys.set_signal will
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raise an Invalid_argument exception. If the signal does not exist
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then we don't need to ignore it, so it's safe to continue. *)
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let ignore_sigpipe () =
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try Sys.(set_signal sigpipe Signal_ignore) with Invalid_argument _ -> ()
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(* Main runloop, which registers a callback so it can be invoked
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when timeouts expire. Thus, the program may only call this function
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once and once only. *)
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let run t =
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ignore_sigpipe ();
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run t
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let () =
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at_exit (fun () ->
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Lwt.abandon_wakeups ();
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run (Mirage_runtime.run_exit_hooks ()))
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