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|
(***********************************************************************)
(* *)
(* 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. *)
(* *)
(***********************************************************************)
(* Torture test - lots of GC *)
let finished = ref false;;
let gc_thread () =
while not !finished do
(* print_string "gc"; print_newline(); *)
Gc.minor();
Thread.yield()
done
let stdin_thread () =
while not !finished do
print_string ">"; flush stdout;
let s = read_line() in
print_string " >>> "; print_string s; print_newline()
done
let writer_thread (oc, size) =
while not !finished do
(* print_string "writer "; print_int size; print_newline(); *)
let buff = String.make size 'a' in
Unix.write oc buff 0 size
done;
let buff = String.make size 'b' in
Unix.write oc buff 0 size
let reader_thread (ic, size) =
while true do
(* print_string "reader "; print_int size; print_newline(); *)
let buff = String.create size in
let n = Unix.read ic buff 0 size in
(* print_string "reader "; print_int n; print_newline(); *)
for i = 0 to n-1 do
if buff.[i] = 'b' then raise Exit
else if buff.[i] <> 'a' then prerr_endline "error in reader_thread"
done
done
let main() =
let t1 = Thread.create gc_thread () in
let (out1, in1) = Unix.pipe() in
let t2 = Thread.create writer_thread (in1, 4096) in
let t3 = Thread.create reader_thread (out1, 4096) in
let (out2, in2) = Unix.pipe() in
let t4 = Thread.create writer_thread (in2, 16) in
let t5 = Thread.create reader_thread (out2, 16) in
try
stdin_thread()
with _ ->
finished := true;
List.iter Thread.join [t1; t2; t3; t4; t5]
let _ = main()
|
