76 lines
2.4 KiB
OCaml
76 lines
2.4 KiB
OCaml
(***********************************************************************)
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(* *)
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(* Objective Caml *)
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(* *)
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(* Xavier Leroy and Pascal Cuoq, projet Cristal, INRIA Rocquencourt *)
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(* *)
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(* Copyright 1996 Institut National de Recherche en Informatique et *)
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(* en Automatique. All rights reserved. This file is distributed *)
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(* under the terms of the GNU Library General Public License. *)
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(* *)
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(***********************************************************************)
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(* $Id$ *)
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(* User-level threads *)
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type t
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external thread_initialize : unit -> unit = "caml_thread_initialize"
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external thread_new : (unit -> unit) -> t = "caml_thread_new"
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external yield : unit -> unit = "caml_thread_yield"
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external self : unit -> t = "caml_thread_self"
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external id : t -> int = "caml_thread_id"
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external join : t -> unit = "caml_thread_join"
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(* For new, make sure the function passed to thread_new never
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raises an exception. *)
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exception Thread_exit
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let create fn arg =
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thread_new
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(fun () ->
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try
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fn arg; ()
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with Thread_exit -> ()
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| exn ->
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Printf.eprintf "Uncaught exception in thread %d: %s\n"
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(id(self())) (Printexc.to_string exn);
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flush stderr)
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let exit () = raise Thread_exit
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(* Thread.kill is currently not implemented due to problems with
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cleanup handlers on several platforms *)
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let kill th = invalid_arg "Thread.kill: not implemented"
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(* Preemption *)
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let preempt signal = yield()
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(* Initialization of the scheduler *)
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let _ =
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ignore(Sys.signal Sys.sigvtalrm (Sys.Signal_handle preempt));
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thread_initialize()
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(* Wait functions *)
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let delay time = ignore(Unix.select [] [] [] time)
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let wait_read fd = ()
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let wait_write fd = ()
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let wait_timed_read fd d =
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match Unix.select [fd] [] [] d with ([], _, _) -> false | (_, _, _) -> true
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let wait_timed_write fd d =
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match Unix.select [] [fd] [] d with (_, [], _) -> false | (_, _, _) -> true
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let select = Unix.select
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let wait_pid p = Unix.waitpid [] p
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external wait_signal : int list -> int = "caml_wait_signal"
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