blob: b3d1025dbb65e92a571536f8028d1b50078fbaac (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
(***********************************************************************)
(* *)
(* OCaml *)
(* *)
(* Xavier Leroy, projet Cristal, INRIA Rocquencourt *)
(* *)
(* Copyright 1996 Institut National de Recherche en Informatique et *)
(* en Automatique. All rights reserved. This file is distributed *)
(* under the terms of the Q Public License version 1.0. *)
(* *)
(***********************************************************************)
open Event
type 'a buffer_channel = {
input: 'a channel;
output: 'a channel;
thread: Thread.t;
}
let new_buffer_channel() =
let ic = new_channel() in
let oc = new_channel() in
let rec buffer_process front rear =
match (front, rear) with
| (["EOF"], []) -> Thread.exit ()
| ([], []) -> buffer_process [sync(receive ic)] []
| (hd::tl, _) ->
select [
wrap (receive ic) (fun x -> buffer_process front (x::rear));
wrap (send oc hd) (fun () -> buffer_process tl rear)
]
| ([], _) -> buffer_process (List.rev rear) [] in
let t = Thread.create (buffer_process []) [] in
{ input = ic; output = oc; thread = t }
let buffer_send bc data =
sync(send bc.input data)
let buffer_receive bc =
receive bc.output
(* Test *)
let box = new_buffer_channel()
let ch = new_channel()
let f () =
buffer_send box "un";
buffer_send box "deux";
sync (send ch 3)
let g () =
print_int (sync(receive ch)); print_newline();
print_string (sync(buffer_receive box)); print_newline();
print_string (sync(buffer_receive box)); print_newline()
let _ =
let t = Thread.create f () in
g();
buffer_send box "EOF";
Thread.join box.thread;
Thread.join t
|
