From: "Jeffrey Loren Shaw" <shawjef3@msu.edu>
To: Jacques Garrigue <garrigue@math.nagoya-u.ac.jp>
Cc: caml-list@inria.fr
Subject: Re: [Caml-list] crash under macos x but not win32
Date: Mon, 09 Apr 2007 23:56:47 -0400 [thread overview]
Message-ID: <E1Hb7TL-0003FH-Ab@sys29.mail.msu.edu> (raw)
In-Reply-To: <20070410.100759.08076654.garrigue@math.nagoya-u.ac.jp>
Jacques Garrigue,
Thanks for your reply! Inspired by your use of Timer.set in Tkthreads, I
decided to use a library I keep handy for queued communication between
threads. Using it frees me of having to type sync, async, etc a lot. The
only major improvement now would be to make it so that you don't have to
poll the queue. I don't know how to do that right now.
type 'a qm =
{q : 'a Queue.t;
m : Mutex.t;
c : Condition.t;
}
let createqm () =
{q = Queue.create ();
m = Mutex.create ();
c = Condition.create ();
}
let addtoq qm a =
Mutex.lock qm.m;
Queue.push a qm.q;
Condition.signal qm.c;
Mutex.unlock qm.m
let getfromq_noblock qm =
if Mutex.try_lock qm.m then
if Queue.is_empty qm.q then
(
Mutex.unlock qm.m;
None
)
else
let r = Some (Queue.pop qm.q) in
Mutex.unlock qm.m;
r
else
None
let testthree () =
let top = openTk () in
let l = Label.create top in
let lconfig s () = Label.configure ~text:s l in
let qm = createqm () in
let loopfun () =
ignore
(
Thread.create
(fun () ->
for i=0 to 5 do
Thread.delay 1.;
addtoq qm (lconfig (string_of_int i))
done
)
()
)
in
let b = Button.create ~text:"Run the test" ~command:loopfun top in
let rec watcher () =
Timer.set
~ms:10
~callback:
(fun () ->
match getfromq_noblock qm with
None -> watcher ()
| Some f -> f (); watcher ()
)
in
watcher ();
pack [l];
pack [b];
mainLoop ();
exit 0;;
testthree ()
next prev parent reply other threads:[~2007-04-10 3:56 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-10 0:19 Jeffrey Loren Shaw
2007-04-10 1:07 ` [Caml-list] " Jacques Garrigue
2007-04-10 2:08 ` skaller
2007-04-10 2:41 ` Jacques Garrigue
2007-04-10 3:56 ` Jeffrey Loren Shaw [this message]
2007-04-10 4:15 ` Jacques Garrigue
2007-04-10 5:52 ` skaller
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