79 lines
2.3 KiB
Plaintext
79 lines
2.3 KiB
Plaintext
(***********************************************************************)
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(* *)
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(* Caml Special Light *)
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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 1995 Institut National de Recherche en Informatique et *)
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(* Automatique. Distributed only by permission. *)
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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 exit : unit -> unit = "caml_thread_exit"
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external join : t -> unit = "caml_thread_join"
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external detach : t -> unit = "caml_thread_detach"
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external kill : t -> unit = "caml_thread_kill"
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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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let create fn arg =
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thread_new
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(fun () ->
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try
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Printexc.print fn arg; exit()
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with x ->
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flush stdout; flush stderr; exit())
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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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#ifdef WIN32
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#define PREEMPT_SIGNAL 1
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#else
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#define PREEMPT_SIGNAL Sys.sigvtalrm
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#endif
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let _ =
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Sys.signal PREEMPT_SIGNAL (Sys.Signal_handle preempt);
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thread_initialize()
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(* Wait functions *)
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#ifdef WIN32
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external delay: float -> unit = "caml_thread_delay"
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#else
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let delay time = Unix.select [] [] [] time; ()
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#endif
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let wait_read fd = ()
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let wait_write fd = ()
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#ifdef WIN32
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let wait_timed_read fd delay = true
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let wait_timed_write fd delay = true
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#else
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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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#endif
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let wait_pid p = Unix.waitpid [] p
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